Podcast
Questions and Answers
The speed (rpm) of the motor is:
The speed (rpm) of the motor is:
- 33
- 3400 (correct)
- 568
- 3276
BJT will amplify in which region?
BJT will amplify in which region?
- Passive Region
- Saturation Region
- Active Region (correct)
- Ohmic Region
Which of the following is related to observation in a measuring instrument?
Which of the following is related to observation in a measuring instrument?
- Accuracy (correct)
- Precision (correct)
- Reproducibility (correct)
If we need to transmit 4 bits, what is the maximum number of ways it can be transmitted?
If we need to transmit 4 bits, what is the maximum number of ways it can be transmitted?
When using a Zener Diode in regulator circuits, the output shape will be affected by:
When using a Zener Diode in regulator circuits, the output shape will be affected by:
The motor used in traveling cranes is:
The motor used in traveling cranes is:
Which of the following is not the transmission voltage in Qatar?
Which of the following is not the transmission voltage in Qatar?
Which of the transmission voltage is not applied in Qatar Electrical Specifications?
Which of the transmission voltage is not applied in Qatar Electrical Specifications?
Which of the following is not true concerning integration tests?
Which of the following is not true concerning integration tests?
The forward pass in project network calculation determines the:
The forward pass in project network calculation determines the:
The single-phase motor generally used with household ceiling fans is:
The single-phase motor generally used with household ceiling fans is:
The peak reverse voltage applied to the diode would be:
The peak reverse voltage applied to the diode would be:
Which item is the property of circuit breakers?
Which item is the property of circuit breakers?
The voltage measured between Corner B and ground is most nearly:
The voltage measured between Corner B and ground is most nearly:
The magnitude of the line current (ampere) in phase C is most nearly:
The magnitude of the line current (ampere) in phase C is most nearly:
Which one is the harmonic source?
Which one is the harmonic source?
A low-pass filter is used to:
A low-pass filter is used to:
A 3-phase, 60-Hz induction motor has a nameplate speed of 1600 rpm. This motor has how many poles?
A 3-phase, 60-Hz induction motor has a nameplate speed of 1600 rpm. This motor has how many poles?
Which of the following is a name for a set of indices and values?
Which of the following is a name for a set of indices and values?
The spinning reserve is the:
The spinning reserve is the:
Which one of the following is not correct based on Ohm’s Law?
Which one of the following is not correct based on Ohm’s Law?
The room amplifier in a wireless system amplifies:
The room amplifier in a wireless system amplifies:
Harmonic currents present in a power system may cause:
Harmonic currents present in a power system may cause:
What does the Kz term represent in the wind load formula?
What does the Kz term represent in the wind load formula?
The OP-AMP circuit shown performs the function of:
The OP-AMP circuit shown performs the function of:
What is the best economical way to start a single-phase motor?
What is the best economical way to start a single-phase motor?
Strength of materials refers to:
Strength of materials refers to:
For which of the following circuit elements is superposition valid?
For which of the following circuit elements is superposition valid?
What is the difference between EPROM and EEPROM?
What is the difference between EPROM and EEPROM?
Why is steel used in concrete structures?
Why is steel used in concrete structures?
For a 12 AWG wire, we should use circuit breaker rating:
For a 12 AWG wire, we should use circuit breaker rating:
If fuse rate = 8 Ampere, what does this mean?
If fuse rate = 8 Ampere, what does this mean?
CMOS Inverter is superior to the R-Pull up inverter due to:
CMOS Inverter is superior to the R-Pull up inverter due to:
The delay time for a series of activities that would not affect project timing is called:
The delay time for a series of activities that would not affect project timing is called:
Which one of the following does not describe ceramic?
Which one of the following does not describe ceramic?
The device used for measuring potential difference is known as:
The device used for measuring potential difference is known as:
Which of the following systems uses Assembly language?
Which of the following systems uses Assembly language?
What is the unit of conductance?
What is the unit of conductance?
Which of the following is not classified as a direct cost?
Which of the following is not classified as a direct cost?
What is the term for the process of decomposing deliverables into smaller, more manageable components?
What is the term for the process of decomposing deliverables into smaller, more manageable components?
The heat loss inside a straight conductor is 60J upon applying current I for 5s. If the resistance of the conductor is decreased to half, and the same current is applied for 5s, what will be the heat dissipation?
The heat loss inside a straight conductor is 60J upon applying current I for 5s. If the resistance of the conductor is decreased to half, and the same current is applied for 5s, what will be the heat dissipation?
Why do we use a power factor correction device to:
Why do we use a power factor correction device to:
Rotor of an induction motor is rotating at synchronous speed, what is the torque?
Rotor of an induction motor is rotating at synchronous speed, what is the torque?
The underground cable is laid in a marine environment at system voltage A. What shall be the design of the cable insulation?
The underground cable is laid in a marine environment at system voltage A. What shall be the design of the cable insulation?
Cable length is 1000m, time of returning signal is 9.43µsec. What is the speed of wave in the cable?
Cable length is 1000m, time of returning signal is 9.43µsec. What is the speed of wave in the cable?
An antenna has an effective aperture of 10m². What additional information is required to determine the amplifier power?
An antenna has an effective aperture of 10m². What additional information is required to determine the amplifier power?
10HP single phase motor, 0.8 PF, 240V, Efficiency = 0.6, what is the current?
10HP single phase motor, 0.8 PF, 240V, Efficiency = 0.6, what is the current?
Which of the following is not an opportunity to do the project?
Which of the following is not an opportunity to do the project?
For the shown block diagram, what is the dumping ratio O/P / I/P = U/R where S = 1?
For the shown block diagram, what is the dumping ratio O/P / I/P = U/R where S = 1?
An alternator is operating at __________ for capacitive loads.
An alternator is operating at __________ for capacitive loads.
The activity on node networks shown below describes a project consisting of 8 tasks A-H. Each node indicates duration in weeks relationship are finish-to-start. The minimum time to complete the project is?
The activity on node networks shown below describes a project consisting of 8 tasks A-H. Each node indicates duration in weeks relationship are finish-to-start. The minimum time to complete the project is?
A super heterodyne AM receiver within an intermediate frequency (IF) of 455 kHz is to be tuned to listen to a station at 540 kHz. What tuning frequency is used in the local oscillator?
A super heterodyne AM receiver within an intermediate frequency (IF) of 455 kHz is to be tuned to listen to a station at 540 kHz. What tuning frequency is used in the local oscillator?
For which of the following topologies can 10BaseT not be used without additional hardware conversion?
For which of the following topologies can 10BaseT not be used without additional hardware conversion?
High voltage windings of a transformer have _________ resistivity than the low voltage side.
High voltage windings of a transformer have _________ resistivity than the low voltage side.
ACR of a conductor with 7 steel wires and 25 aluminum wires can be specified as:
ACR of a conductor with 7 steel wires and 25 aluminum wires can be specified as:
The output D in the circuit is:
The output D in the circuit is:
Cable length is 1000m, time of returning signal is 9.43µsec what is speed of wave in the cable?
Cable length is 1000m, time of returning signal is 9.43µsec what is speed of wave in the cable?
The equivalent circuit of an induction machine at no load is the same as that of the transformer but with:
The equivalent circuit of an induction machine at no load is the same as that of the transformer but with:
Which of these is not a rule of interaction?
Which of these is not a rule of interaction?
Within the battery, conventional current flow is:
Within the battery, conventional current flow is:
Activity on arrow needs to use dummy activities to avoid precedence problem that can happen due to:
Activity on arrow needs to use dummy activities to avoid precedence problem that can happen due to:
What is the average value of signal v(t) = 5 sin377t?
What is the average value of signal v(t) = 5 sin377t?
A 3 phase transformer, 25MVA, 66-12.47kV, delta-wye connected, 8 percent impedance. On the 100 MVA, per unit impedance is most nearly:
A 3 phase transformer, 25MVA, 66-12.47kV, delta-wye connected, 8 percent impedance. On the 100 MVA, per unit impedance is most nearly:
A DC Voltmeter with coil resistance 150Ω is to be measured with sensitivity of 10,000Ω/V and the voltage Range 0-100V. What type and magnitude of resistance required?
A DC Voltmeter with coil resistance 150Ω is to be measured with sensitivity of 10,000Ω/V and the voltage Range 0-100V. What type and magnitude of resistance required?
The offset of a particular segment varies from:
The offset of a particular segment varies from:
The power gain of 30dB is equivalent to which amplification factor?
The power gain of 30dB is equivalent to which amplification factor?
The power factor of an alternator depends on:
The power factor of an alternator depends on:
Fluorescent light flickers due to:
Fluorescent light flickers due to:
Which of the following theorem is used for frequency?
Which of the following theorem is used for frequency?
Which of the following can represent an activity on a project network?
Which of the following can represent an activity on a project network?
The Accreditation Board for Engineering and Technology (ABET) is an accrediting agency for:
The Accreditation Board for Engineering and Technology (ABET) is an accrediting agency for:
A cyclic redundancy check (CRC) generator is based on what operation?
A cyclic redundancy check (CRC) generator is based on what operation?
First step of scope planning starts with:
First step of scope planning starts with:
The term Fast Track means:
The term Fast Track means:
In the figure:
In the figure:
Cascade amplifier is used to reduce load effect; the output impedance will be:
Cascade amplifier is used to reduce load effect; the output impedance will be:
Output of Cascade amplifier is:
Output of Cascade amplifier is:
The CPU architecture shown in the figure below is best described as:
The CPU architecture shown in the figure below is best described as:
Incandescent lamp will work normally with best efficiency at the power factor is:
Incandescent lamp will work normally with best efficiency at the power factor is:
HRC Fuse means High Rupturing Capacity?
HRC Fuse means High Rupturing Capacity?
System means group of elements making a function?
System means group of elements making a function?
A certain communication channel has a signal to noise ratio of 7 and a bandwidth of 10kHz. What is the channel capacity?
A certain communication channel has a signal to noise ratio of 7 and a bandwidth of 10kHz. What is the channel capacity?
Software maintenance activities can be classified into several maintenance types. Which of the following is not a software maintenance type?
Software maintenance activities can be classified into several maintenance types. Which of the following is not a software maintenance type?
An industrial plant is served by a 12470-v delta/480-v grounded-wye transformer. The high voltage side of the transformer is served from a 12470-v wye-connected distribution line that has a grounded neutral. The best protection of the transformer against lightning strikes on the 12470-v line will result from surge arrester connection of:
An industrial plant is served by a 12470-v delta/480-v grounded-wye transformer. The high voltage side of the transformer is served from a 12470-v wye-connected distribution line that has a grounded neutral. The best protection of the transformer against lightning strikes on the 12470-v line will result from surge arrester connection of:
The primary difference between a programmable logic array designated 16R8 and one designated 20R8 is that the 20R8 has:
The primary difference between a programmable logic array designated 16R8 and one designated 20R8 is that the 20R8 has:
What type of bond guarantees that if a contractor goes broke on a project, the surety will pay the necessary amount to complete the job?
What type of bond guarantees that if a contractor goes broke on a project, the surety will pay the necessary amount to complete the job?
The one-line diagram below represents three single-phase transformers connected in a delta-wye arrangement and rated for the line to line voltages indicated. The turns ratio of the individual single-phase transformer is mostly nearly:
The one-line diagram below represents three single-phase transformers connected in a delta-wye arrangement and rated for the line to line voltages indicated. The turns ratio of the individual single-phase transformer is mostly nearly:
An engineer chooses open collector output TTL technology to provide sufficient current to drive a device. The circuit shown is implemented with a 7405 package and corresponds to which logic function (assume that a logic 0 corresponds to 0V)?
An engineer chooses open collector output TTL technology to provide sufficient current to drive a device. The circuit shown is implemented with a 7405 package and corresponds to which logic function (assume that a logic 0 corresponds to 0V)?
Which of the following junction nodes are forward biased?
Which of the following junction nodes are forward biased?
Which of the following best describes the sequential steps in an Object-Oriented design?
Which of the following best describes the sequential steps in an Object-Oriented design?
Increasing the current withdrawn from a battery has what effect on the battery capacity and why?
Increasing the current withdrawn from a battery has what effect on the battery capacity and why?
The only load on a 3-phase, 4-wire system is placed between phase B and phase C. The phase to phase voltage is 13.2kV. The load is 500kVA at 0.85 lagging power factor. The magnitude of the line current (amperes) in phase C is most nearly:
The only load on a 3-phase, 4-wire system is placed between phase B and phase C. The phase to phase voltage is 13.2kV. The load is 500kVA at 0.85 lagging power factor. The magnitude of the line current (amperes) in phase C is most nearly:
A BJT is used to amplify in:
A BJT is used to amplify in:
An over excited alternator is operating at:
An over excited alternator is operating at:
Which of the following statements best describes how a power transformer’s total losses vary with kVA load?
Which of the following statements best describes how a power transformer’s total losses vary with kVA load?
A power plant uses a turbine-driven synchronous generator rated 3-phase, 150MVA, 13.8kV, 0.85 lagging power factor. At all the rated conditions, the power output (MW) is most nearly:
A power plant uses a turbine-driven synchronous generator rated 3-phase, 150MVA, 13.8kV, 0.85 lagging power factor. At all the rated conditions, the power output (MW) is most nearly:
The main cause for transformer humming is:
The main cause for transformer humming is:
A synchronous motor working on a leading power factor but not driving any mechanical load is known as:
A synchronous motor working on a leading power factor but not driving any mechanical load is known as:
Field programmable gate arrays (FPGAs) and other array logic devices normally contain numerous flip-flops. These flip-flops are generally of the type:
Field programmable gate arrays (FPGAs) and other array logic devices normally contain numerous flip-flops. These flip-flops are generally of the type:
The minimum standard wire gauge of earth wire is:
The minimum standard wire gauge of earth wire is:
With respect to relational record-based data models at the user level, a relation is represented in a:
With respect to relational record-based data models at the user level, a relation is represented in a:
Which of the following choices is not one of the stages of a project life cycle?
Which of the following choices is not one of the stages of a project life cycle?
Out of the following, which is the best example of a project?
Out of the following, which is the best example of a project?
For the 4-wire RTD circuit shown, which of the following would cause the greatest measurement error in Vsense?
For the 4-wire RTD circuit shown, which of the following would cause the greatest measurement error in Vsense?
Which of the following parallel resistances will have the highest value of equivalent resistance?
Which of the following parallel resistances will have the highest value of equivalent resistance?
100 resistors of 100 ohm each connected in parallel. What is the equivalent resistance?
100 resistors of 100 ohm each connected in parallel. What is the equivalent resistance?
A 3-phase capacitor rated at 240V and 110 kVAR has been proposed for correcting the power factor of a 3-phase induction motor operating at 280 V. The reactive power (kVAR) that will be provided by the capacitor is most nearly:
A 3-phase capacitor rated at 240V and 110 kVAR has been proposed for correcting the power factor of a 3-phase induction motor operating at 280 V. The reactive power (kVAR) that will be provided by the capacitor is most nearly:
A series of fuel cells is connected to produce a no-load voltage of 230V at a rated voltage of 300V. The cells provide 2.0MW to a DC-AC converter. Assuming the cells can be modeled as a standard battery, what is the total internal resistance of the fuel cells?
A series of fuel cells is connected to produce a no-load voltage of 230V at a rated voltage of 300V. The cells provide 2.0MW to a DC-AC converter. Assuming the cells can be modeled as a standard battery, what is the total internal resistance of the fuel cells?
Permanent magnet has a relative permeability that is _________ magnetic material:
Permanent magnet has a relative permeability that is _________ magnetic material:
For effective earthing, which of the following mixture is preferred for filling around the earth electrode?
For effective earthing, which of the following mixture is preferred for filling around the earth electrode?
A discrete silicon semiconductor diode is forward biased at 0.75V, what is the approximate current?
A discrete silicon semiconductor diode is forward biased at 0.75V, what is the approximate current?
For last switching of an NMOS R-pull up inverter (W/L) should be:
For last switching of an NMOS R-pull up inverter (W/L) should be:
The voltage regulation of an alternator is ___________ for capacitive loads.
The voltage regulation of an alternator is ___________ for capacitive loads.
The first step of project scope definition is to:
The first step of project scope definition is to:
While machine in operation, the slip of the synchronous machine is:
While machine in operation, the slip of the synchronous machine is:
If the induction motor speed at no-load is 745 RPM, what is the speed of the motor?
If the induction motor speed at no-load is 745 RPM, what is the speed of the motor?
Synchronous speed for a motor of 1600 RPM, 60hz, calculate number of poles.
Synchronous speed for a motor of 1600 RPM, 60hz, calculate number of poles.
BJT will act as a switch in which region:
BJT will act as a switch in which region:
What is pipe-lining?
What is pipe-lining?
A room with a floor area of 50ft x 30ft and a ceiling height of 10ft has luminaires suspended 2ft from the ceiling. Assuming a working plane of 30in and a required illumination level of 50fc, the net luminous flux (lumens) using fixtures with a coefficient of utilization of 0.78 is most nearly:
A room with a floor area of 50ft x 30ft and a ceiling height of 10ft has luminaires suspended 2ft from the ceiling. Assuming a working plane of 30in and a required illumination level of 50fc, the net luminous flux (lumens) using fixtures with a coefficient of utilization of 0.78 is most nearly:
An alternator is said to be over excited when it is operating at:
An alternator is said to be over excited when it is operating at:
A synchronous motor is said to be over excited when it is operating at:
A synchronous motor is said to be over excited when it is operating at:
A micro antenna is:
A micro antenna is:
What is the primary use for fast track scheduling?
What is the primary use for fast track scheduling?
In Harvard Architecture:
In Harvard Architecture:
The direction of the force acting on a moving charge placed in a magnetic field is:
The direction of the force acting on a moving charge placed in a magnetic field is:
The unit of conductance is:
The unit of conductance is:
ABET stands for Accreditation Board for Engineering and Technology.
ABET stands for Accreditation Board for Engineering and Technology.
For the circuit shown, the phase shift of the transfer function V/Vo at very high frequencies is:
For the circuit shown, the phase shift of the transfer function V/Vo at very high frequencies is:
The third harmonic of the Fourier series for the waveform in the figure has a frequency (Hz) of:
The third harmonic of the Fourier series for the waveform in the figure has a frequency (Hz) of:
The wire placed on the top of a transmission line is a:
The wire placed on the top of a transmission line is a:
Consider the three-stages r-f amplifier configuration. The total noise figure (dB) is most nearly:
Consider the three-stages r-f amplifier configuration. The total noise figure (dB) is most nearly:
Of the following engineering disciplines, who would be BEST suited to design and operate an automobile factory?
Of the following engineering disciplines, who would be BEST suited to design and operate an automobile factory?
Which of the following describes the leakage flux?
Which of the following describes the leakage flux?
Fast Tracking in Project means?
Fast Tracking in Project means?
We have three resistances of values 2Ω, 3Ω, and 6Ω. Which of the following combinations will give an effective resistance of 4Ω?
We have three resistances of values 2Ω, 3Ω, and 6Ω. Which of the following combinations will give an effective resistance of 4Ω?
This question investigates the performance of the temperature sensor. The operation amplifier (op amp) is ideal. At 100°C, the maximum output voltage at Vo/Vs due to the tolerances in Rz is most nearly:
This question investigates the performance of the temperature sensor. The operation amplifier (op amp) is ideal. At 100°C, the maximum output voltage at Vo/Vs due to the tolerances in Rz is most nearly:
The condition for successful parallel operation of transformers is:
The condition for successful parallel operation of transformers is:
The output of a NOR gate is HIGH if __________.
The output of a NOR gate is HIGH if __________.
Digital telecommunication equipment provides connection-oriented AND/OR connectionless service, connection-oriented service is provided by:
Digital telecommunication equipment provides connection-oriented AND/OR connectionless service, connection-oriented service is provided by:
Commercial AM Modulation technique is:
Commercial AM Modulation technique is:
For last switching of an NMOS R-pull-up inverter (W/L) should be:
For last switching of an NMOS R-pull-up inverter (W/L) should be:
A real-time kernel is considered a 'bare bones' real-time operating system. At a minimum, a kernel should provide:
A real-time kernel is considered a 'bare bones' real-time operating system. At a minimum, a kernel should provide:
A certain communication signal uses a bandwidth BW of 2kHz. What is the classification of this signal?
A certain communication signal uses a bandwidth BW of 2kHz. What is the classification of this signal?
In an induction motor, no load the slip is generally:
In an induction motor, no load the slip is generally:
Minimum voltage regulation occurs when the power factor of the load is:
Minimum voltage regulation occurs when the power factor of the load is:
In medium-sized induction motors, the slip is generally around:
In medium-sized induction motors, the slip is generally around:
The manufacturing company gets materials from 2 suppliers X & Y. If X delays the procurement of materials by 2 days and the company takes 10 days to obtain the material, what shall be the delays (days) for product completion?
The manufacturing company gets materials from 2 suppliers X & Y. If X delays the procurement of materials by 2 days and the company takes 10 days to obtain the material, what shall be the delays (days) for product completion?
If an alternator is over excited:
If an alternator is over excited:
The input impedance of a cascade amplifier will:
The input impedance of a cascade amplifier will:
The rotor of an induction motor is rotating at synchronous speed. What is the torque?
The rotor of an induction motor is rotating at synchronous speed. What is the torque?
What does the power factor stand for?
What does the power factor stand for?
What is the minimum gauge size of the earthing cable?
What is the minimum gauge size of the earthing cable?
To get rid of DC offset, use?
To get rid of DC offset, use?
For forward biasing:
For forward biasing:
Transformer resistivity:
Transformer resistivity:
Amplifier working with good gain in:
Amplifier working with good gain in:
What is MOSFET?
What is MOSFET?
To minimize loading effect, use?
To minimize loading effect, use?
An alternator connected on no load condition affects the efficiency due to:
An alternator connected on no load condition affects the efficiency due to:
Transformer saturation:
Transformer saturation:
What will be the output impedance of a cascade amplifier to minimize the loading effect?
What will be the output impedance of a cascade amplifier to minimize the loading effect?
An Uninterruptible Power System has to be connected to the network by:
An Uninterruptible Power System has to be connected to the network by:
What is the purpose of the neutral line in a 3-phase power system?
What is the purpose of the neutral line in a 3-phase power system?
An engineer received a new scope of work which is not included in the original scope. What action does he have to take?
An engineer received a new scope of work which is not included in the original scope. What action does he have to take?
An active filter will:
An active filter will:
Embedded systems should have the best:
Embedded systems should have the best:
If the gain of an amplifier is 10 and has negative feedback of 9%, what will be the gain if the feedback is removed?
If the gain of an amplifier is 10 and has negative feedback of 9%, what will be the gain if the feedback is removed?
Humming of a transformer is due to:
Humming of a transformer is due to:
I = 5 Cos wt + 2 Cos wt, R = 3 Ohms. Find the wattage:
I = 5 Cos wt + 2 Cos wt, R = 3 Ohms. Find the wattage:
A 1000m cable is terminated with a short circuit at the far end. The first reflected wave appears 9.43µs after the incident wave. The actual velocity in the cable divided by the speed of light is: Vp = 2L/To
A 1000m cable is terminated with a short circuit at the far end. The first reflected wave appears 9.43µs after the incident wave. The actual velocity in the cable divided by the speed of light is: Vp = 2L/To
High voltage winding of a transformer has ________ resistivity than the low voltage side.
High voltage winding of a transformer has ________ resistivity than the low voltage side.
Three 30µF capacitors are connected in star (Y) form between the terminals A, B, C and a junction point N as shown in the figure. The capacitance (µF) between terminals A and B is most nearly:
Three 30µF capacitors are connected in star (Y) form between the terminals A, B, C and a junction point N as shown in the figure. The capacitance (µF) between terminals A and B is most nearly:
The output D in the circuit is:
The output D in the circuit is:
Power consumption in the advanced embedded system is:
Power consumption in the advanced embedded system is:
Calculate the Vout:
Calculate the Vout:
Harmonics in a system is mainly due to:
Harmonics in a system is mainly due to:
Main objective of transmission system:
Main objective of transmission system:
Which of the following parallel resistance will have the highest value of the equivalent resistance?
Which of the following parallel resistance will have the highest value of the equivalent resistance?
In the receiver of a wireless system, we must amplify the received signal using:
In the receiver of a wireless system, we must amplify the received signal using:
An overcurrent relay is used to protect a circuit with a maximum 3-phase fault current of 8000A. Primary A 400:5 current transformer ratio and a 5A relay tap setting are selected. If the total secondary burden on the current transformer for the maximum fault condition is 1:10Ω, the excitation voltage (V) that must be developed by the current transformer is most nearly:
An overcurrent relay is used to protect a circuit with a maximum 3-phase fault current of 8000A. Primary A 400:5 current transformer ratio and a 5A relay tap setting are selected. If the total secondary burden on the current transformer for the maximum fault condition is 1:10Ω, the excitation voltage (V) that must be developed by the current transformer is most nearly:
In the 3-phase system, the neutral is:
In the 3-phase system, the neutral is:
Which circuit breaker is used at the distribution level?
Which circuit breaker is used at the distribution level?
Open circuit test on a transformer is conducted to obtain:
Open circuit test on a transformer is conducted to obtain:
The electric flux passing out through a closed surface is equal to:
The electric flux passing out through a closed surface is equal to:
The output is to be maintained at 24V, while the input varies from 120V to 126V with a load current ranging from 0A to 5A. What is the minimum power of the supply resistor?
The output is to be maintained at 24V, while the input varies from 120V to 126V with a load current ranging from 0A to 5A. What is the minimum power of the supply resistor?
On the question above, what is the minimum diode power rating that can be used?
On the question above, what is the minimum diode power rating that can be used?
On the question above, what is the required supply resistance to ensure proper operation of the Zener regulator circuit?
On the question above, what is the required supply resistance to ensure proper operation of the Zener regulator circuit?
On the question above, what is the maximum Zener current?
On the question above, what is the maximum Zener current?
Find the total float of activity D for the project:
Find the total float of activity D for the project:
The self-discharge rate of a lead-acid battery is least dependent on which of the following factors?
The self-discharge rate of a lead-acid battery is least dependent on which of the following factors?
The minimum standard wire gauge of earth wire is:
The minimum standard wire gauge of earth wire is:
The unit of current is:
The unit of current is:
The most economical method of starting a single-phase motor is:
The most economical method of starting a single-phase motor is:
In the circuit shown, which resistor(s) is (are) redundant?
In the circuit shown, which resistor(s) is (are) redundant?
A copper cable used in a plain old telephone service line has a loss of 1.5 dB/km. What is the approximate loss experienced if the user is located 1.5km from a central office?
A copper cable used in a plain old telephone service line has a loss of 1.5 dB/km. What is the approximate loss experienced if the user is located 1.5km from a central office?
A lossy transmission line is used to connect a transmitter to an antenna. If the VSWR measured at the antenna end of the transmission line is 1.5, which of the following statements is correct?
A lossy transmission line is used to connect a transmitter to an antenna. If the VSWR measured at the antenna end of the transmission line is 1.5, which of the following statements is correct?
Which of the following characteristics is not typical of a project manager?
Which of the following characteristics is not typical of a project manager?
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be:
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be:
A de current of 50A is flowing in an isolated wire. The magnitude of the magnetic field intensity, H (A/m) 10cm from the center of the wire is: H= I/2Ï€r
A de current of 50A is flowing in an isolated wire. The magnitude of the magnetic field intensity, H (A/m) 10cm from the center of the wire is: H= I/2Ï€r
Which type of braking is used in an induction motor?
Which type of braking is used in an induction motor?
What is the common or usual method to ensure that the final set of construction documents satisfies the client's program and design goals?
What is the common or usual method to ensure that the final set of construction documents satisfies the client's program and design goals?
In a cascade amplifier, to reduce the loading effect at the output, the output impedance of the last stage should be:
In a cascade amplifier, to reduce the loading effect at the output, the output impedance of the last stage should be:
In a cascade amplifier, to reduce the loading effect at the input, the input impedance of the first stage should be:
In a cascade amplifier, to reduce the loading effect at the input, the input impedance of the first stage should be:
In which of the following circuits will the voltage source produce the most current:
In which of the following circuits will the voltage source produce the most current:
Which of the following theorem is used for frequency?
Which of the following theorem is used for frequency?
The main cause of transformer humming is:
The main cause of transformer humming is:
If the induction motor speed at no-load is 745 RPM, what is the speed of the motor?
If the induction motor speed at no-load is 745 RPM, what is the speed of the motor?
Synchronous speed for a motor of 1600 RPM at 60Hz. Calculate the number of poles.
Synchronous speed for a motor of 1600 RPM at 60Hz. Calculate the number of poles.
At what region of operation is the base emitter junction forward biased and the base collector junction reverse biased for BJT?
At what region of operation is the base emitter junction forward biased and the base collector junction reverse biased for BJT?
Flashcards are hidden until you start studying
Study Notes
Electrical and Electronic Engineering Key Concepts
- An alternator is considered over-excited when operating at leading power factor.
- A synchronous motor is over-excited at leading power factor as well.
- Micro antennas are characterized as short antennas, typically used in compact designs.
- Fast track scheduling aims to prevent future cost increases during construction projects.
- Harvard Architecture maintains separated code and data memory spaces, enhancing efficiency.
- Force on a moving charge in a magnetic field acts perpendicular to both the charge's motion and the magnetic field.
- Conductance is measured in mho, which is the inverse of resistance.
- ABET signifies the Accreditation Board for Engineering and Technology, which is true.
- Phase shift in transfer function at high frequencies can be around -90°.
- Harmonics in a waveform are related to frequency, with the third harmonic often not existing in certain scenarios.
Transformers and Electrical Components
- High-voltage windings in transformers generally have higher resistivity than low-voltage windings.
- Leakage flux in transformers refers to flux that is unlinked with either the primary or secondary circuitry.
- For transformers to operate in parallel effectively, conditions include correct polarity and equal per unit impedance.
- Voltage regulation in electrical systems is minimized at unity power factor.
- Induction motors exhibit a very low slip at no load, typically less than 1%.
- Efficient operation of a parallel transformer connection requires identical voltage ratings and frequency.
Circuitry and Signals
- The output of a NOR gate results in HIGH only when all inputs are LOW.
- Digital telecommunication equipment uses ATM for connection-oriented services.
- AM modulation techniques used commercially are often DSB-LC, which stands for Double Sideband Amplitude Modulation.
- In cascading amplifiers, to reduce loading effects, the output impedance should be low, while input impedance should be high.
General Engineering Concepts
- Engineers adjusting to new scopes of work must inform supervisors before proceeding.
- Uninterruptible Power Systems connect parallel to feed power during critical times.
- Ground wires serve as a return path for fault currents, ensuring safety.
- The minimum size for earthing cables typically aligns with a wire gauge of 10 SWG or larger.
- Self-discharge rates of lead-acid batteries are least influenced by nominal voltage.
Current and Voltage in Circuits
- The unit of current is the Ampere, a fundamental measure in electrical systems.
- Power factor correction devices are implemented primarily to improve power factor metrics.
- For calculating wattage: use the formula P = I²R, adjusting for the specific configuration of the circuit.
- Effective resistance in parallel combinations favors the lowest resistance path, affecting overall circuit performance.
Miscellaneous Technical Insights
- The 'Zener diode' mainly serves for voltage regulation within circuits.
- Heat loss in conductors is closely related to current and resistance, expressed as P = I²R.
- Induction motors can employ different braking methods, including dynamic and regenerative braking.
- In project management, client reviews are essential to ensure compliance with design goals.
- The speed of signals in cables can be calculated using the relationship between time and length, often using fractional representations of the speed of light.
This summary captures fundamental concepts and questions relevant to electrical and electronic engineering, suitable for quick revision and understanding.### Tuning and Frequency
- For the super heterodyne AM receiver listening to a station at 540 kHz with an intermediate frequency (IF) of 455 kHz, the local oscillator tuning frequency is 995 kHz.
Network Topologies
- 10BaseT cannot be used without additional hardware conversion in the Bus topology, unlike Star, Tree, or Point to Point.
Transformer Properties
- The high voltage winding of a transformer has higher resistivity compared to the low voltage side.
- ACR (Aluminum Conductor with Steel Reinforcement) can be specified as 7/25 for 7 steel wires and 25 aluminum wires.
- The equivalent circuit of an induction machine at no load resembles that of a transformer with an open-circuited secondary.
Project Management
- Dummy activities are required to avoid precedence problems, particularly in parallel, burst, or merged activities.
- The average value of the signal described by v(t) = 5 sin(377t) is approximately 3.2V.
Electrical and Electronic Concepts
- The power gain of 30 dB corresponds to an amplification factor of 1000.
- The power factor of an alternator is influenced by the connected load, rotor speed, and core losses.
- Fluorescent lights flicker primarily due to low frequency.
Software Engineering and Testing
- Adaptive, corrective, and perfective maintenance are common software maintenance types; customer-initiated maintenance is not included.
- Integration testing combines separately tested modules to ensure they function correctly together, using either top-down or bottom-up approaches.
Electrical Measurements and Circuit Analysis
- Measurement of cable signal return time gives a wave speed in the cable close to 0.75, calculated from a 1000m length and 9.43µsec time return.
- The output D in a circuit could be expressed as A·(B + C), (A + B)·(B + C), AB + BC, or (A + B)·CB based on logic gate configurations.
Power and Efficiency
- The capacity of a communication channel with a 7 signal-to-noise ratio and 10 kHz bandwidth is about 30000 bps.
- Power output from a turbine-driven synchronous generator rated 150 MVA and 0.85 power factor is approximately 128 MW.
Operational Parameters
- The slip of a synchronous machine when operational is zero.
- The luminous flux needed for adequate lighting in a specific room is calculated to approximately 96000 lumens using a utilization factor of 0.78.
Diode Characteristics
- The current through a silicon diode biased at 0.75V is approximated to be around 3.0 mA.
General Engineering Principles
- A 3-phase transformer with a delta-wye connection provides a turns ratio near 4.8.
- An over-excited alternator operates at a leading power factor.
Energy and Electromagnetic Theory
- The relative permeability of a permanent magnet is higher than that of non-magnetic materials.
- The dynamic resistance of a Zener diode affects output characteristics in regulation applications.
Practical Applications
- Electric motors used in cranes typically include DC compound motors or AC induction motors.
- The minimum standard wire gauge for earth wire is 8 SWG to ensure safety and efficacy in grounding systems.
These notes offer concise yet comprehensive highlights of the studied concepts, suitable for revision and deeper understanding within electrical and electronic engineering fields.### Harmonics and Loads
- Harmonic sources include variable impedance loads, saturable magnetic loads, and power electronic based loads; all contribute harmonics to power systems.
- Harmonic currents can lead to excessive heating, malfunctioning of control circuits, and resonance effects.
Filters
- A low-pass filter is designed to stop high frequencies while passing low frequencies.
- High pass filters stop low frequencies, band pass filters allow a specific range of frequencies, and band stop filters target specific frequency ranges.
Induction Motors
- A 3-phase, 60-Hz induction motor running at 1600 rpm has 4 poles, determined by synchronous speed calculations.
Projects and Management
- Upon project initiation, crucial steps include establishing a reporting process, defining project scope, and developing a project charter.
Electrical Engineering Concepts
- Spinning reserve refers to generating capacity connected to the grid, ready to take on load as needed.
- The voltage gain without feedback in an amplifier with 9% negative feedback and a gain of 10 is approximately 11.1.
- The minimum standard wire gauge for earth wire is 16 SWG.
Circuit Elements and Components
- Resistors in series and parallel yield different total resistances; example calculation shows the combination of resistances to achieve specific total resistance values.
- Ground fault protection schemes utilize resistors to limit ground current and maintain potential differences.
Data Structures and Analysis
- An array is a set of indices and values, while stacks and queues are different ways to manage data.
- Kirchhoff's law is commonly used for analyzing circuits with multiple sources.
Amplifiers
- Inverting amplifiers have high input impedance while non-inverting amplifiers have similarly designed input impedances.
- Output impedance for both types of amplifiers varies according to their configuration.
Power Systems and Performance
- The performance of a power system can be affected by external and internal circuit conditions; studies such as power-flow analysis involve defining slack and control buses.
- Harmonic effects are crucial, requiring careful management to prevent equipment failure.
Communication Systems
- Frequency Division Multiplexing (FDM) in optical communication is termed Wavelength Division Multiplexing (WDM).
- Transmitters operating at specific frequencies require calculations to convert power output into decibel measurements.
Engineering Ethics and Practices
- Ethics encompass codes of behavior derived from various societal constructs and impact personal and professional decision-making.
Project Scheduling and Reliability
- Project scheduling involves breaking down tasks and estimating the resources required for each.
- Reliability calculations involve considering various factors and their interaction within the system; reliability within circuits can be expressed in probability terms.
Advanced Technologies
- Digital Signal Processors (DSPs) design specifically for high-speed operations are essential in applications such as FFT for oscilloscopes.
- CMOS technology offers advantages over traditional inverters, particularly in minimizing power consumption and maximizing efficiency.
Conclusion
- Understanding these engineering concepts, their applications, and implications is crucial for successful project management, effective circuit design, and efficient power system operations.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
