Questions and Answers
Two resistances R1 and R2 give combined resistance of 4.5 ohms when in series and 1 ohm when in parallel. The resistances are:
An underground system is built for a military marine system with a normal voltage level. A following fault analysis design the insulation is most nearly the voltage level for which the insulation on the distribution system is designed?
The voltage gain of an amplifier with 9% negative feedback is 10. What is the voltage gain without feedback?
What type of filter is represented in the block plot shown below?
Signup and view all the answers
Which terminal represents the control input of a BJT?
Signup and view all the answers
What is the minimum standard wire gauge of earth wire?
Signup and view all the answers
An activity in a project network can be represented by which of the following?
Signup and view all the answers
Harmonics in a system is mainly due to?
Signup and view all the answers
What is the analysis technique to determine the effect of multi-sources?
Signup and view all the answers
What is meant by Ethics?
Signup and view all the answers
Referring to the figure the voltage V across till: 50-U resistor is:
Signup and view all the answers
The collector region of a transistor is doped how?
Signup and view all the answers
A transmitter operating at 23.6GHz has a power output of 20nW. The receiver is located 8 miles from the transmitter (in dB) is?
Signup and view all the answers
First line in Transmission is used for?
Signup and view all the answers
In HDL based digital systems, the arithmetic multiplication function is difficult to synthesize. Design solutions to this challenge do not include?
Signup and view all the answers
An OP-AMP based inverting amplifier; the INPUT impedance is:
Signup and view all the answers
An OP-AMP based Non-inverting amplifier; the INPUT impedance is:
Signup and view all the answers
An OP-AMP based inverting amplifier; the OUTPUT impedance is:
Signup and view all the answers
An OP-AMP based Non-inverting amplifier; the OUTPUT impedance is:
Signup and view all the answers
An OP-AMP based Non-inverting amplifier; the OUTPUT resistance is:
Signup and view all the answers
Which circuit breaker is commonly used in distribution level?
Signup and view all the answers
In general, when comparing BJT and MOSFET transistors, three main differences:
Signup and view all the answers
Which engineering characteristic can best explain the following concept? Base your decision on reason rather than emotion.
Signup and view all the answers
Which of the following characteristics of a data network is never correct for a packet switched network?
Signup and view all the answers
According to the Nyquist Sampling Theorem, a sufficient condition for there to be no aliasing in the sampled signal is that the highest frequency in the signal must be:
Signup and view all the answers
If the signal power is doubled at a given transmitter, what is the decibel increase?
Signup and view all the answers
In optical communication, Frequency Division Multiplexing (FDM) is called?
Signup and view all the answers
TQM stands for?
Signup and view all the answers
Intersymbol interference is eliminated by applying which of the following?
Signup and view all the answers
Which is liquid in the following substances?
Signup and view all the answers
The power factor of an alternator is obtained from its?
Signup and view all the answers
Two circuit components of reliability R1 = 0.92 ohms and R2 = 0.85 ohms. If anyone of the circuit components fails, what is the combination of reliability of both components?
Signup and view all the answers
A variable resistance R is connected across a source of voltage V, if the value of the resistance R is gradually varied, the relationship between I and R will be represented by which curve?
Signup and view all the answers
Considering the interdisciplinary nature of engineering projects, which of the following is true?
Signup and view all the answers
In a 50Hz induction machine, if the no-load speed is 2900 RPM, what is the slip frequency?
Signup and view all the answers
The I/P side of the GSM network should contain?
Signup and view all the answers
Power consumption in Advanced Embedded systems can be reduced by using?
Signup and view all the answers
Which of the following regression models is not considered to be a linear regression model for predicting Y in terms of X?
A. Y=bo + b1x1 , d. Y=bo + b1x1^b2 ,, Ans is D
Signup and view all the answers
Which device is faster and consumes less power in large scale projects?
Signup and view all the answers
In Fig 1.5.1, what is the purpose of Block B?
Signup and view all the answers
The highest element in the hierarchical breakdown of the WBS is:
Signup and view all the answers
The lowest element in the hierarchical breakdown of the WBS is:
Signup and view all the answers
A Digital Signal Processor (DSP) is designed to perform FFT operations for a digital oscilloscope that utilizes a 12-bit A/D converter. What is the most cost-effective ALU architecture for this CPU?
Signup and view all the answers
The fan-out of a logic gate is?
Signup and view all the answers
Splitting a project into tasks and estimating the time and resources required to complete each task is called?
Signup and view all the answers
A large scale integrated (LSI) circuit is shown in the figure below. What is the best description of the circuit?
Signup and view all the answers
A 3-phase distribution line conductor configuration is as follows?
Signup and view all the answers
The circuit shown is a ground fault protection scheme. The purpose of R is to:
Signup and view all the answers
Find the early and late start of activity D for the project:
Signup and view all the answers
In which figure is the relationship between voltage and current in accordance with Ohm's Law?
Signup and view all the answers
Which of the estimates listed would occur last in the project timeline?
Signup and view all the answers
The transfer function Y/R for the block diagram shown below is:
Signup and view all the answers
Figure 1 represents equivalent transformations of the components in Figure 2. What are the values of the transformed source and resistor in Figure 1?
Signup and view all the answers
The power factor of an alternator depends on:
Signup and view all the answers
Fluorescent light flickers due to:
Signup and view all the answers
Which of the following theorem is used for frequency?
Signup and view all the answers
Which of the following can represent an activity on a project network?
Signup and view all the answers
The Accreditation Board for Engineer and Technology (ABET) is an accrediting agency for:
Signup and view all the answers
A cyclic redundancy check (CRC) generator is based on what operation?
Signup and view all the answers
First step of scope planning starts with:
Signup and view all the answers
The term Fast Track means:
Signup and view all the answers
Cascade amplifier is used to reduce load effect; the output impedance will be:
Signup and view all the answers
Output of Cascade amplifier is:
Signup and view all the answers
The CPU architecture shown in the figure below is best described as:
Signup and view all the answers
Incandescent lamp will work normally with best efficiency at the power factor is:
Signup and view all the answers
HRC Fuse means High Rupturing Capacity?
Signup and view all the answers
System means group of elements making a function?
Signup and view all the answers
A certain communication channel has a signal to noise ratio of 7 and a bandwidth of 10 kHz. What is the channel capacity?
Signup and view all the answers
Software maintenance activities can be classified into several maintenance types. Which of the following is not a software maintenance type?
Signup and view all the answers
An industrial plant is served by a 12470-v delta/480-v grounded-wye transformer. The best protection of the transformer against lightning strikes on the 12470-v line will result from surge arrester connection of:
Signup and view all the answers
The primary difference between a programmable logic array designated 16R8 and one designated 20R8 is that the 20R8 has:
Signup and view all the answers
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?
Signup and view all the answers
Which statement is true regarding the turns ratio of individual single-phase transformers connected in a delta-wye arrangement rated for the line-to-line voltages indicated?
Signup and view all the answers
An engineer chooses open collector output TTL technology to provide sufficient current to drive a device. What logic function corresponds to the circuit shown implemented with a 7405 package?
Signup and view all the answers
Which of the following junction nodes are forward biased?
Signup and view all the answers
Which of the following best describes the sequential steps in an Object-Oriented design?
Signup and view all the answers
Increasing the current withdrawn from a battery has what effect on the battery capacity and why?
Signup and view all the answers
The only load on a 3-phase, 4-wire system is placed between phase B and phase C. The phase-to-phase voltage is 13.2 kV. The load is 500 kVA at 0.85 lagging power factor. The magnitude of the line current (amperes) in phase C is most nearly:
Signup and view all the answers
A BJT is used to amplify in:
Signup and view all the answers
An over excited alternator is operating at:
Signup and view all the answers
Which of the following statements best describe how a power transformer’s total losses vary with kVA load?
Signup and view all the answers
A power plant uses a turbine-driven synchronous generator rated 3-phase, 150 MVA, 13.8 kV, 0.85 lagging power factor. What is the power output (MW) most nearly?
Signup and view all the answers
The main cause for transformer humming is:
Signup and view all the answers
A synchronous motor working on a leading power factor but not driving any mechanical load is known as:
Signup and view all the answers
Field programmable gate arrays (FPGAs) and other array logic devices normally contain numerous flip-flops. These flip-flops are generally of the type:
Signup and view all the answers
The minimum standard wire gauge of earth wire is:
Signup and view all the answers
With respect to relational record-based data models at the user level, a relation is represented in a:
Signup and view all the answers
Which of the following choices is not one of the stages of a project life cycle?
Signup and view all the answers
Out of the following which is the best example of a project?
Signup and view all the answers
For the 4-wire RTD circuit shown, which of the following would cause the greatest measurement error in Vsense?
Signup and view all the answers
Which of the following parallel resistances will have the highest value of equivalent resistance?
Signup and view all the answers
100 resistors of 100 ohm each connected in parallel. What is the equivalent resistance?
Signup and view all the answers
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:
Signup and view all the answers
A series of fuel cells is connected to produce a no-load voltage of 230V at a rated voltage of 300V. Assuming the cell can be modeled as a standard battery, what is the total internal resistance of the fuel cells:
Signup and view all the answers
Permanent magnet has a relative permeability that is __________ magnetic material:
Signup and view all the answers
For effective earthing, which of the following mixture is preferred for filling around the earth electrode?
Signup and view all the answers
A discrete silicon semiconductor diode is forward biased at 0.75V. What is the approximate current?
Signup and view all the answers
For last switching of an NMOS R-pull up inverter (W/L) should be:
Signup and view all the answers
The voltage regulation of an alternator is ___________ for capacitive loads.
Signup and view all the answers
The first step of project scope definition is to:
Signup and view all the answers
While machine in operation, the slip of the synchronous machine is:
Signup and view all the answers
If the induction motor speed at no-load is 745 RPM, what would be the synchronous speed of the motor?
Signup and view all the answers
Synchronous speed for a motor at 1600 RPM with a frequency of 60Hz, calculate number of poles.
Signup and view all the answers
BJT will act as a switch in which region:
Signup and view all the answers
What is pipelining?
Signup and view all the answers
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:
Signup and view all the answers
A motor is equipped with an optical shaft encoder to measure motor speed. The optical encoder provides 200 pulses per motor revolution. The microcontroller counts 372 pulses in an RTI interval of 32.768ms. What is the speed (rpm) of the motor?
Signup and view all the answers
BJT will amplify in which region?
Signup and view all the answers
Which of the following relates to observation in a measuring instrument?
Signup and view all the answers
A digital signal needs to be modulated and transmitted. If we need to transmit 4 bits, what is the maximum number of ways it can be transmitted?
Signup and view all the answers
When using a Zener diode in regulator circuits, the output shape will be affected by:
Signup and view all the answers
The motor used in a traveling crane is:
Signup and view all the answers
Which of the following is not the transmission voltage in Qatar?
Signup and view all the answers
Which of the transmission voltage is not applied in Qatar Electrical Specifications?
Signup and view all the answers
An important step in the software lifecycle is testing. One type of testing is integration testing. Which of the following is not true concerning integration tests?
Signup and view all the answers
The forward pass in project network calculation determines the:
Signup and view all the answers
The single-phase motor generally used with household ceiling fans is:
Signup and view all the answers
The source voltage in the circuit shown is v = 100sin(377t), the peak reverse voltage applied to the diode would be:
Signup and view all the answers
All of the following are properties of fuses rather than circuit breakers, with one exception; which item is the property of circuit breakers?
Signup and view all the answers
A phase, 3-wire ungrounded, 13.2kV (phase-to-phase) wye-connected source is connected to a balanced delta load that is grounded on corner A. The voltage measured between Corner B and ground is most nearly:
Signup and view all the answers
The only load on a 3-phase, 4-wire system is placed between phase B and phase C. The phase-to-phase voltage is 13.2 kV. The load is 500 kVA at 0.85 lagging power factor. The magnitude of the line current (ampere) in phase C is most nearly:
Signup and view all the answers
Which one is the harmonic source in the following list?
Signup and view all the answers
A low-pass filter is used to:
Signup and view all the answers
A 3-phase, 60-Hz induction motor has a nameplate speed of 1600 rpm. How many poles does this motor have?
Signup and view all the answers
Which of the following is a name for a set of indices and values?
Signup and view all the answers
Your boss has just approved the initiation of a project to celebrate Qatar National Day. As the project manager, what should you do?
Signup and view all the answers
The spinning reserve is the:
Signup and view all the answers
Two resistances R1 and R2 give combined resistance of 4.5 ohms when in series and 1 ohm when in parallel. What are R1 and R2?
Signup and view all the answers
Study Notes
Power Factor and Alternators
- Power factor of an alternator is influenced by rotor speed, core losses, load, and armature losses.
- An over-excited alternator operates at a leading power factor.
Flicker in Fluorescent Lights
- Fluorescent light flickering occurs due to low frequency.
Theorems and Frequency
- Shannon Theorem is applicable for frequency-related calculations.
Project Management Aspects
- Activities in a project network can be represented by arrows and nodes.
- The first step for scope planning involves defining objectives and customer requirements.
- Fast Track refers to overlapping design and construction phases.
Capacitors and Inductors
- A 3-phase capacitor rated at 240V and 110 kVAR provides reactive power corrective measures.
- A cascading amplifier reduces load effects by offering low output impedance.
Electrical Components
- HRC stands for High Rupturing Capacity in fuse terminology.
- Zener Diode output shape is influenced by its dynamic resistance and input current.
Voltage and Current Calculations
- A communication channel with a signal-to-noise ratio of 7 and bandwidth of 10 kHz has a calculated channel capacity of 30,000 bps.
- Line current in a 3-phase system can be derived from load and voltage measurements.
Software Maintenance and Life Cycle
- Types of software maintenance include adaptive, corrective, and perfective maintenance.
- Integration testing ensures that separately tested parts of a software function together correctly.
Resistor Configurations
- In a parallel arrangement, 10 kΩ and 25 kΩ resistors yield the highest equivalent resistance.
- Combining 100 resistors of 100 ohms in parallel results in 1 ohm equivalent resistance.
Transformer Operations
- Transformer humming primarily arises from vibrations in the core lamination.
- Voltage regulation of an alternator is positive for capacitive loads.
Signal Processing
- A low-pass filter is designed to stop high frequencies while allowing low frequencies to pass.
- Harmonics in electrical systems are primarily generated by variable impedance loads and power electronic devices.
BJT Operations
- BJTs amplify current primarily in the active region and act as switches in the saturation region.
Project Lifecycle Stages
- Common stages in a project lifecycle include concept, initiation, planning, execution, and delivery/closure.
Miscellaneous Electrical Concepts
- The source voltage in certain circuits determines peak reverse voltage affecting diodes.
- The effective grounding of electrical systems depends on the choice of filling material around electrodes.
Current and Power in Induction Motors
- Induction motor speed is influenced by load and frequency, with typical operating ranges outlined for different configurations.
General Electrical Knowledge
- Permanent magnets have higher relative permeability than other magnetic materials.
- The minimum standard wire gauge for grounding wire applications is essential for safety, with 8 SWG being more effective than lower gauges.
Calculations and Measurements
- Various calculations such as voltage gain in amplifiers and internal resistance in circuits help in understanding system performance.
- Measurements using optical encoders and microcontrollers can yield precise motor speeds based on pulse count and timing intervals.
Ethics in Engineering
- Ethics encompass behavior codes, societal rules, and standards of right and wrong in engineering practices.
Conclusions
- The material covers diverse engineering concepts essential for exams and practical applications, reinforcing critical knowledge areas for electrical/electronic engineering students.### Transistor Collector Region
- The collector region of a transistor is typically doped Heavily to improve its conductivity.
Transmitter Power Output
- A transmitter operating at 23.6 GHz with a power output of 20 nW located 8 miles away results in a receiver power level of approximately 124 dB.
Transmission Lines
- The first line in transmission serves the purpose of ground.
HDL-Based Digital Systems
- Arithmetic multiplication in HDL systems is challenging; hardware-intensive simultaneous generation of partial products is not a recommended solution.
OP-AMP Inverting Amplifier Input Impedance
- The input impedance of an OP-AMP based inverting amplifier is considered Infinity.
OP-AMP Non-Inverting Amplifier Input Impedance
- The input impedance of an OP-AMP based non-inverting amplifier is also about Infinity.
OP-AMP Inverting Amplifier Output Impedance
- Output impedance for an OP-AMP based inverting amplifier is Zero.
OP-AMP Non-Inverting Amplifier Output Impedance
- The output impedance of an OP-AMP based non-inverting amplifier measures around Zero.
Non-Inverting Amplifier Output Resistance
- In an OP-AMP non-inverting setup, the output resistance is classified as Zero.
Circuit Breakers
- The most commonly used circuit breaker at the distribution level is the Air Circuit Breaker.
BJT vs. MOSFET Transistors
- BJT devices are more dependent on geometry.
- MOSFETs can achieve higher amplification.
- MOSFETs dissipate no power at the input due to zero input current.
Engineering Characteristics
- The best fit for decisions based on reasoning is Logical Thinking.
Packet Switched Network Characteristics
- A packet switched network does not contain only information bits in packets; it includes source and destination addresses, information, and error control bits.
Nyquist Sampling Theorem
- To avoid aliasing, the highest frequency in a signal must be less than half the sampling frequency.
Power Doubling in Decibels
- Doubling a signal's power results in a 3 dB increase.
Optical Communication FDM
- Frequency Division Multiplexing (FDM) is referred to as Wavelength Division Multiplexing (WDM) in optical communication.
Total Quality Management
- TQM represents Total Quality Management.
Intersymbol Interference
- Elimination of intersymbol interference is done using the Nyquist Criterion.
Liquid Substances
- Mercury (Hg) is the only liquid amongst the listed substances at room temperature.
Alternator Power Factor
- The power factor of an alternator is influenced by its Load.
Reliability of Circuit Components
- Combined reliability of circuit components R1 and R2 when one fails is 0.99.
Variable Resistance and Current Relationship
- The relationship between current (I) and resistance (R) forms a curved graph when resistance changes.
Interdisciplinary Engineering Projects
- Engineers should be well trained in multiple engineering fields to adapt to interdisciplinary projects.
Induction Machine No Load Speed
- With a no-load speed of 2900 RPM, the slip frequency in a 50 Hz induction machine is 1.33 Hz.
GSM Network I/P Side
- The I/P side of the GSM network typically includes a Band Pass Filter.
Reducing Power Consumption
- Power consumption in advanced embedded systems can be reduced through Parallelizing.
Linear Regression Models
- Not all listed regression models are considered linear.
Fast and Low Power Devices
- ASIC (Application Specific Integrated Circuit) devices are faster and consume less power in large scale projects.
Block B Purpose
- In a block diagram, Block B could function as an IF Amplifier.
Highest Element in WBS
- The highest element in the hierarchical breakdown of the Work Breakdown Structure (WBS) is The Project.
Lowest Element in WBS
- The lowest element in the WBS is a Work Package.
DSP for FFT Operations
- The most cost-effective ALU architecture for DSP in a digital oscilloscope using a 12-bit A/D converter is a Fixed point multiplier with a 16-bit data path.
Logic Gate Fan Out
- Fan out of a logic gate refers to the number of gates connected to its output.
Project Task Estimation
- Breaking projects into tasks and estimating time/resources required is known as Project Scheduling.
LSI Circuit Description
- A large scale integrated circuit may best be described as a Phase Locked Loop.
3-Phase Distribution Line
- The conductor configuration for a 3-phase distribution line is 4.0.
Ground Fault Protection Scheme Purpose
- The purpose of resistance (R) in a ground fault scheme includes limiting the ground current and preventing damage.
Activity Start Timing
- Early Start (ES) and Late Start (LS) of activity D in a project can be ES = 22, LS = 24.
Relationship of Voltage and Current per Ohm's Law
- The correct figure illustrating the relationship of voltage and current according to Ohm's Law can be identified as Figure A.
Last Estimate in Project Timeline
- The last estimate in the project timeline is a Bid Estimate.
Transfer Function
- The transfer function Y/R for a given block diagram can be determined correctly as per the specifics mentioned.
Equivalent Transformations in Figures
- The transformed values of the source and resistor in equivalent transformations can be expressed as specifics based on calculations.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on electrical and electronic engineering concepts with this comprehensive reviewer material. This quiz covers various topics including power factors, fluorescent lighting, and key theorems in frequency analysis. Perfect for students preparing for exams or revising key principles.