Podcast
Questions and Answers
The room amplifier in a wireless system amplifies:
The room amplifier in a wireless system amplifies:
- The modulated signal only
- The encoded and modulated signal (correct)
- The received signal
- The baseband signals
Harmonic currents present in a power system may cause:
Harmonic currents present in a power system may cause:
- Excessive heating
- Malfunctioning of the control and regulating circuits
- Resonance
- All of the above (correct)
What does the Kz term represent in the wind load formula Lsi = 0.613v² m/s KzGRF / CfAm²?
What does the Kz term represent in the wind load formula Lsi = 0.613v² m/s KzGRF / CfAm²?
- Force Coefficient
- Wind Speed
- Velocity Pressure Coefficient
- Guest Response Factor (correct)
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?
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?
If fuse rated = 8 Ampere, what does that mean?
If fuse rated = 8 Ampere, what does that 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 the project timing is called:
The delay time for a series of activities that would not affect the 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 is not part of Scope Management?
Which is not part of Scope Management?
The final step in the definition of a work breakdown structure is to:
The final step in the definition of a work breakdown structure is to:
During transformer saturation:
During transformer saturation:
Which material has high thermal and electrical conductivity?
Which material has high thermal and electrical conductivity?
The power factor of an alternator depends on:
The power factor of an alternator depends on:
If an induction motor speed at no-load is 745 RPM, what is the speed of the motor?
If an induction motor speed at no-load is 745 RPM, what is the speed of the motor?
Which transmission voltage is not applicable in Qatar?
Which transmission voltage is not applicable in Qatar?
The assembly language is usually used for programming:
The assembly language is usually used for programming:
What is the unit of conductance?
What is the unit of conductance?
The term sustainability refers to:
The term sustainability refers to:
Which of the following would not be classified as a direct cost?
Which of the following would not be classified as a direct cost?
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 power factor correction devices?
Why do we use power factor correction devices?
If the rotor of an induction motor is rotating at synchronous speed, what is the torque?
If the rotor of an induction motor is rotating at synchronous speed, what is the torque?
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?
For a 10HP single-phase motor, 0.8 PF, 240V, Efficiency = 0.6, what is the current?
For a 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?
An alternator is operating at __________ for capacitive loads.
An alternator is operating at __________ for capacitive loads.
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 transformers have _________ resistivity than the low voltage side.
High voltage windings of transformers 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:
Which of the following is not a rule of interaction?
Which of the following is not a rule of interaction?
Within the battery, conventional current flow is:
Within the battery, conventional current flow is:
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?
A BJT is used to amplify in:
A BJT is used to amplify in:
The voltage regulation of an alternator is ___________ for capacitive loads.
The voltage regulation of an alternator is ___________ for capacitive loads.
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?
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?
What is the equivalent resistance of 100 resistors of 100 ohm each connected in parallel?
What is the equivalent resistance of 100 resistors of 100 ohm each connected in parallel?
A motor is equipped with an optical shaft encoder to measure motor speed.
A motor is equipped with an optical shaft encoder to measure motor speed.
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:
What is the speed (rpm) of the motor if 372 pulses are counted in an RTI interval of 32.768 ms?
What is the speed (rpm) of the motor if 372 pulses are counted in an RTI interval of 32.768 ms?
BJT will amplify in which region?
BJT will amplify in which 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?
What is the maximum number of ways a digital signal can be transmitted if we need to transmit 4 bits?
What is the maximum number of ways a digital signal can be transmitted if we need to transmit 4 bits?
When using Zener Diode in regulator circuits, the output shape is affected by:
When using Zener Diode in regulator circuits, the output shape is affected by:
Which motor is generally used in traveling cranes?
Which motor is generally used in traveling cranes?
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 voltages is not applied in Qatar Electrical Specifications?
Which of the transmission voltages is not applied in Qatar Electrical Specifications?
In integration testing, which statement is not true?
In integration testing, which statement is not true?
The single-phase motor generally used with household ceiling fans is:
The single-phase motor generally used with household ceiling fans is:
If the source voltage is $v = 100 \sin(377t)$, the peak reverse voltage applied to the diode would be:
If the source voltage is $v = 100 \sin(377t)$, the peak reverse voltage applied to the diode would be:
Which of the following are properties of fuses rather than circuit breakers?
Which of the following are properties of fuses rather than 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 in the following list?
Which one is the harmonic source in the following list?
A low-pass filter is used to:
A low-pass filter is used to:
A 3-phase, 60-Hz induction motor with a nameplate speed of 1600 rpm has how many poles?
A 3-phase, 60-Hz induction motor with a nameplate speed of 1600 rpm 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?
Your boss has just approved the initiation of a project to celebrate Qatar National Day. What should Sadia, the project manager, do?
Your boss has just approved the initiation of a project to celebrate Qatar National Day. What should Sadia, the project manager, do?
The spinning reserve is defined as:
The spinning reserve is defined as:
Two resistances R1 and R2 give a combined resistance of 4.5 ohms when in series and 1 ohm when in parallel. The resistances are:
Two resistances R1 and R2 give a combined resistance of 4.5 ohms when in series and 1 ohm when in parallel. The resistances are:
An underground system built for a military marine system requires insulation for which voltage level?
An underground system built for a military marine system requires insulation for which voltage level?
The voltage gain of an amplifier with 9% negative feedback is 10. What is the voltage gain without feedback?
The voltage gain of an amplifier with 9% negative feedback is 10. What is the voltage gain without feedback?
In block plots, what type is represented?
In block plots, what type is represented?
Which terminal represents the control input of a BJT?
Which terminal represents the control input of a BJT?
What is the minimum standard wire gauge of earth wire?
What is the minimum standard wire gauge of earth wire?
An activity in a project network can be represented by which of the following?
An activity in a project network can be represented by which of the following?
Harmonics in a system is mainly due to:
Harmonics in a system is mainly due to:
Which is the analysis technique to determine the effect of multi-sources?
Which is the analysis technique to determine the effect of multi-sources?
What is meant by ethics?
What is meant by ethics?
What voltage V across a 50-U resistor in the figure?
What voltage V across a 50-U resistor in the figure?
The collector region of a transistor is doped how?
The collector region of a transistor is doped how?
A transmitter operating at 23.6GHz has a power output of 20nW. The received power is located 8 miles from the transmitter.
A transmitter operating at 23.6GHz has a power output of 20nW. The received power is located 8 miles from the transmitter.
Which phase in transmission is used for?
Which phase in transmission is used for?
In HDL based digital systems, the arithmetic multiplication function which design solution to this challenge do not include:
In HDL based digital systems, the arithmetic multiplication function which design solution to this challenge do not include:
An OP-AMP based inverting amplifier; the INPUT impedance is:
An OP-AMP based inverting amplifier; the INPUT impedance is:
An OP-AMP based Non-inverting amplifier; the INPUT impedance is:
An OP-AMP based Non-inverting amplifier; the INPUT impedance is:
An OP-AMP based Inverting amplifier; the OUTPUT impedance is:
An OP-AMP based Inverting amplifier; the OUTPUT impedance is:
An OP-AMP based Non-inverting amplifier; the OUTPUT impedance is:
An OP-AMP based Non-inverting amplifier; the OUTPUT impedance is:
What is the common circuit breaker used in the distribution level?
What is the common circuit breaker used in the distribution level?
When comparing BJT and MOSFET transistors, which statement is correct?
When comparing BJT and MOSFET transistors, which statement is correct?
Which of the engineering characteristics can best explain the concept?
Which of the engineering characteristics can best explain the concept?
Which of the following characteristics of a data network is never correct of a packet switched network?
Which of the following characteristics of a data network is never correct of a packet switched network?
According to the Nyquist Sampling Theorem, for no aliasing in the sampled signal, the highest frequency in the signal must be:
According to the Nyquist Sampling Theorem, for no aliasing in the sampled signal, the highest frequency in the signal must be:
If the signal is power doubled at a given transmitter, what is the decibel increase?
If the signal is power doubled at a given transmitter, what is the decibel increase?
In optical communication, Frequency Division Multiplexing (FDM) is called?
In optical communication, Frequency Division Multiplexing (FDM) is called?
TQM stands for:
TQM stands for:
Intersymbol interference is eliminated by applying which of the following?
Intersymbol interference is eliminated by applying which of the following?
Which is liquid in the following substances?
Which is liquid in the following substances?
The power factor of an alternator is obtained from its:
The power factor of an alternator is obtained from its:
What is the combination of reliability of both circuit components R1 and R2 if R1 = 0.92 ohms and R2 = 0.85 ohms?
What is the combination of reliability of both circuit components R1 and R2 if R1 = 0.92 ohms and R2 = 0.85 ohms?
If variable resistance R is connected across a source of voltage V, which curve represents the relationship between I and R as R is varied?
If variable resistance R is connected across a source of voltage V, which curve represents the relationship between I and R as R is varied?
Which of the following statements is true considering the interdisciplinary nature of engineering projects?
Which of the following statements is true considering the interdisciplinary nature of engineering projects?
In a 50Hz induction machine, if the no-load speed is 2900 RPM, what is the slip frequency?
In a 50Hz induction machine, if the no-load speed is 2900 RPM, what is the slip frequency?
The I/P side of the GSM network should contain:
The I/P side of the GSM network should contain:
Power consumption in Advanced Embedded can be reduced by using:
Power consumption in Advanced Embedded can be reduced by using:
Which of the following regression models is not considered a linear regression for predicting Y in terms of X?
Which of the following regression models is not considered a linear regression for predicting Y in terms of X?
Which device is faster and consumes less power in large scale projects?
Which device is faster and consumes less power in large scale projects?
Figure 1.5.1 asks what is the purpose of Block B?
Figure 1.5.1 asks what is the purpose of Block B?
In terms of hierarchical breakdown of Work Breakdown Structure (WBS), what is the highest element?
In terms of hierarchical breakdown of Work Breakdown Structure (WBS), what is the highest element?
What is the lowest element in the hierarchical breakdown of WBS?
What is the lowest element in the hierarchical breakdown of WBS?
A Digital Signal Processor (DSP) performing FFT for a digital oscilloscope should utilize which ALU architecture?
A Digital Signal Processor (DSP) performing FFT for a digital oscilloscope should utilize which ALU architecture?
The fan out of a logic gate is defined as:
The fan out of a logic gate is defined as:
The process of splitting a project into tasks and estimating time and resources is called:
The process of splitting a project into tasks and estimating time and resources is called:
A large scale integrated (LSI) circuit described here is best termed what?
A large scale integrated (LSI) circuit described here is best termed what?
A 3-phase distribution line conductor configuration is as follows:
A 3-phase distribution line conductor configuration is as follows:
In a ground fault protection scheme, the purpose of R is to:
In a ground fault protection scheme, the purpose of R is to:
What are the early and late start times of activity D for the project?
What are the early and late start times of activity D for the project?
Which figure represents the relationship between voltage and current in accordance with Ohm's Law?
Which figure represents the relationship between voltage and current in accordance with Ohm's Law?
Which estimate listed would occur last in the project timeline?
Which estimate listed would occur last in the project timeline?
What is the transfer function Y/R for the block diagram shown below?
What is the transfer function Y/R for the block diagram shown below?
In figure 1, the values of the transformed source and resistor in a circuit are most nearly:
In figure 1, the values of the transformed source and resistor in a circuit are 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.
The phase shift of the transfer function V/Vo at very high frequencies is:
The phase shift of the transfer function V/Vo at very high frequencies is:
The third harmonic of the Fourier series for the waveform has a frequency (Hz) of:
The third harmonic of the Fourier series for the waveform 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:
For the circuit shown phase shift of the transfer function V/Vo at very high frequencies is:
For the circuit shown phase shift of the transfer function V/Vo at very high frequencies is:
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 2, 3, and 6. Which of the following combinations will give an effective resistance of 4?
We have three resistances of values 2, 3, and 6. Which of the following combinations will give an effective resistance of 4?
At 100°C, the maximum output voltage at Vo/Vs due to the tolerances in Rz is most nearly:
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:
At a minimum, a kernel should provide:
At a minimum, a kernel should provide:
A certain communication signal uses a bandwidth BW of 2 kHz. What is the classification of this signal?
A certain communication signal uses a bandwidth BW of 2 kHz. 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 Torque?
The rotor of an induction motor is rotating at synchronous speed. What is 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:
An amplifier working with good gain is in:
An amplifier working with good gain is in:
What is MOSFET?
What is MOSFET?
To minimize loading effect use?
To minimize loading effect use?
An alternator connected on no-load condition, what affects the efficiency?
An alternator connected on no-load condition, what affects the efficiency?
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?
Uninterruptible Power System has to be connected to the network by:
Uninterruptible Power System has to be connected to the network by:
What is the purpose of the neutral line in the 3-phase power system?
What is the purpose of the neutral line in the 3-phase power system?
An engineer received a new scope of work which is not included in the original scope. What action should he take?
An engineer received a new scope of work which is not included in the original scope. What action should he take?
An active filter will:
An active filter will:
Embedded system should have the best:
Embedded system should have the best:
If the gain of an amplifier is 10 and has 9% negative feedback, what will be the gain if the feedback is removed?
If the gain of an amplifier is 10 and has 9% negative feedback, what will be the gain if the feedback is removed?
Humming of a transformer is due to:
Humming of a transformer is due to:
Determine the wattage for I = 5 Cos wt + 2 Cos wt, R = 3 Ohms:
Determine the wattage for I = 5 Cos wt + 2 Cos wt, R = 3 Ohms:
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:
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:
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. The capacitance (µF) between terminals A and B is most nearly:
Three 30µF capacitors are connected in star (Y) form. 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 the transmission system:
Main objective of the 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 1:10, what is the excitation voltage (V) that must be developed by the current transformer?
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 1:10, what is the excitation voltage (V) that must be developed by the current transformer?
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. Assuming ideal conditions, 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. Assuming ideal conditions, 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 statement 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 statement 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 DC 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/2r
A DC 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/2r
Which type of braking is used in an induction motor?
Which type of braking is used in an induction motor?
What is the common method to ensure that the final set of construction documents satisfy the client's program and design goals?
What is the common method to ensure that the final set of construction documents satisfy 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 running at 1600 RPM, 60 Hz, calculate number of poles.
Synchronous speed for a motor running at 1600 RPM, 60 Hz, calculate 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?
What is the role of the Zener diode?
What is the role of the Zener diode?
Study Notes
Alternators and Synchronous Motors
- An alternator is over excited when it operates at a leading power factor.
- A synchronous motor is also over excited in a leading power factor condition.
Antennas and Scheduling
- Micro antenna refers to a short antenna.
- Fast track scheduling aims to avoid future cost increases.
Harvard Architecture
- Harvard Architecture features separate spaces for code and data.
Force on Moving Charge
- The force acting on a moving charge in a magnetic field is perpendicular to the magnetic field.
Electrical Units
- The unit of conductance is the mho.
- ABET stands for the Accreditation Board for Engineering and Technology.
Transfer Functions and Harmonics
- High-frequency transfer function phase shift can be -90°.
- The third harmonic corresponds to a frequency of 750 Hz.
Electrical Wiring and Components
- A wire on top of a transmission line is typically a phase wire.
- Identical voltage and frequency ratings are crucial for parallel operation of transformers.
Project Management
- Fast tracking in projects means starting before design completion.
- A mechanical engineer is most suited to design and operate an automobile factory.
Amplifiers and Noise Figures
- Total noise figure of a cascaded RF amplifier stages can be estimated using the appropriate formulas.
- Input and output impedance considerations are crucial in cascade amplifiers to minimize loading effects.
Induction Motors
- In an induction motor at no load, the slip is generally less than 1%.
- Torque is zero when the rotor is at synchronous speed.
Power Factor and Electricity Standards
- Power factor represents the cosine of the angle between voltage and current.
- Minimum gauge size for earthing cable is 8.
Filtering and Signal Properties
- To eliminate DC offset, a high-pass filter should be used.
- A low-noise amplifier is necessary to amplify received signals in wireless systems.
Relay Protection and Circuit Breakers
- An overcurrent relay safeguards circuits with a defined maximum fault current.
- Air circuit breakers are typically used at the distribution level.
Losses and Environmental Factors
- Open circuit tests on transformers evaluate core loss.
- Self-discharge rates of lead-acid batteries depend least on nominal voltage.
Electrical Theory and Components
- The voltage gain in amplifiers with feedback can be calculated based on negative feedback percentages.
- The speed of wave propagation in a cable relates directly to cable length and signal return time.
Induction Motor and Braking
- Multiple methods including regenerative, dynamic, and plugging can be applied for braking induction motors.
Zener Diodes and Heat Loss
- Zener diodes mainly serve voltage regulation.
- Heat dissipation in conductors follows Joule's law and varies with resistance changes.
Harmonics and System Efficiency
- Harmonics arise due to variable impedance loads and power electronics in a system.
- Primary objectives of transmission systems include reliability and voltage regulation.
Resistor Configurations and Current Production
- Parallel resistances produce different equivalent resistance values, impacting current distribution.
Practical Applications and Design Calculations
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Power requirements for Zener regulator circuits must account for load conditions.
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For inductive loads, motor torque characteristics change significantly when operating at synchronous speeds.### Questions and Answers
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The tuning frequency of a local oscillator for a superheterodyne AM receiver with an IF of 455 kHz, tuned to 540 kHz, is 995 kHz.
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10BaseT cannot be used without additional hardware conversion in a Point to Point topology.
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High voltage windings of a transformer have higher resistivity than the low voltage side.
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The ACR of a conductor with 7 steel wires and 25 aluminum wires is specified as 7/25.
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In the given circuit, the output D can be expressed as AB + AC.
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The speed of a wave in a cable with a length of 1000m and a returning signal time of 9.43µsec is approximately 0.75.
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The no-load equivalent circuit of an induction machine resembles that of a transformer with an open-circuited secondary.
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The power gain of 30dB corresponds to an amplification factor of 1000.
Electrical and Electronic Concepts
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The power factor of an alternator is influenced by the rotor speed, core losses, load connected, and armature losses.
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Fluorescent light flickers primarily due to low frequency.
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Frequency representation in activity on a project network can be shown using an arrow or a node.
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ABET is an accrediting agency for engineering education programs.
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A cyclic redundancy check (CRC) generator utilizes modulo 2 division.
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Project scope planning begins with defining objectives and customer requirements.
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Fast Track refers to construction starting before design completion.
Electrical Calculations and Measurements
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For a no-load synchronous motor operating at a slip of zero, it's functioning efficiently with no significant losses.
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The channel capacity for a communication channel with a signal-to-noise ratio of 7 and a bandwidth of 10 kHz is approximately 30000 bps.
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The greatest measurement error in Vsense for a 4-wire RTD circuit can be caused by increasing lead resistance.
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The equivalent resistance of 100 resistors of 100 ohms each connected in parallel is 1 ohm.
Component Characteristics and Functionality
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The main cause of transformer humming is vibration in core lamination.
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An overexcited alternator operates at a leading power factor.
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The forward bias condition of diodes is determined by the voltage at the anode compared to the cathode.
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The minimum standard wire gauge for earth wire is 20 SWG.
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The type of bond ensuring project completion if a contractor fails is a performance bond.
Project Management and Power Systems
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The forward pass in project network calculation determines the earliest start and end times of activities.
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A split phase or capacitor start single-phase motor is commonly used in household ceiling fans.
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A phase-to-ground voltage in a grounded delta load can be calculated from phase-to-phase voltage.
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The reactive power absorbed by a capacitor serving a 3-phase induction motor can be calculated using the power formula.
Technical Principles and Standards
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A synchronous motor functioning with no mechanical load is referred to as a synchronous condenser.
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The voltage regulation of an alternator is negative for capacitive loads.
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The primary difference between two programmable logic arrays is the number of input pins, as designated by their nomenclature.
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In the context of digital signals, the maximum number of ways to transmit 4 bits is 16.
Miscellaneous
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The relative permeability of a permanent magnet is typically higher than other magnetic materials.
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The best mixture for filling around an earth electrode for effective earthing includes a lime-sand mixture.
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High rupturing capacity (HRC) means fuses can withstand high fault currents without breaking.
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A digital signal requiring modulation for transmission can be calculated using bit techniques.### Electronics and Electrical Engineering Concepts
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Low-pass filters allow low frequencies to pass while blocking high frequencies.
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Induction motors can be characterized by the number of poles; a 60-Hz motor with 1600 RPM operates with 4 poles.
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Arrays serve as a collection of indices and values in programming.
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Project management involves establishing reporting processes, scoping projects, and developing project charters.
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Spinning reserve refers to generating capacity that is ready to take on load.
Circuit Analysis and Components
- Combined resistance in series is different from parallel configurations; understanding calculation methods is key.
- Fault analysis for underground systems must assess insulation voltage levels appropriately.
- Amplifier voltage gain can be affected by negative feedback; understanding this relationship is crucial.
Project Management and Estimation
- The Work Breakdown Structure (WBS) defines task hierarchies in project management, with deliverables at the top and work packages at the bottom.
- Effective project scheduling requires dividing tasks and estimating resources accurately.
Electrical Characteristics and Laws
- Harmonic currents are primarily caused by variable loads and power electronics.
- Ohm’s Law relates current, voltage, and resistance in simple circuits.
- The fan-out of a logic gate is defined as the number of gates connected to its output.
Advanced Topics in Engineering
- Digital Signal Processing (DSP) is essential in systems requiring fast and power-efficient processing.
- The Nyquist Sampling Theorem prevents aliasing by ensuring that the highest frequency in a signal is less than half the sampling frequency.
- Total Quality Management (TQM) emphasizes the systemic approach to quality in engineering and production.
Practical Applications and Maintenance
- Understanding power factor and excitation in alternators can affect load management in electrical systems.
- Different materials have varying thermal and electrical conductivity; metals typically outperform ceramics in conductivity.
- Assessments of circuits require knowledge of components such as OP-AMPs and their input/output impedances.
Financial Management in Projects
- Payback period calculations are essential for understanding the profitability of investment projects; net annual profits should be evaluated against desired rates of return.
- Risk management should account for the reliability of circuit components and their effect on overall system performance.
Safety and Standards
- Familiarity with wire gauge standards is crucial for electrical installations to prevent overloading.
- Ground fault protection schemes design safety features in electrical circuits to maintain safety during faults.
Miscellaneous Concepts
- Analysis techniques like Kirchhoff's Law and the Superposition Principle are vital for solving complex circuit problems.
- Reliability of circuit components should be assessed holistically when designing systems.
This compilation covers essential concepts vital for engineering examinations and provides a structured insight into various topics relevant to electronics and electrical engineering principles.
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Test your knowledge of electrical and electronic engineering concepts with this reviewer material. The quiz covers topics such as alternators, synchronous motors, and micro antennas. Perfect for engineering students preparing for exams or reviews.
