Q. Which controller is typically used to eliminate steady-state error in a system?
A.
Proportional controller
B.
Integral controller
C.
Derivative controller
D.
PID controller
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Solution
An integral controller is used to eliminate steady-state error by integrating the error over time.
Correct Answer:
B
— Integral controller
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Q. Which controller is used to eliminate steady-state error in a system?
A.
Proportional controller
B.
Integral controller
C.
Derivative controller
D.
PID controller
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Solution
An integral controller is specifically designed to eliminate steady-state error by integrating the error over time.
Correct Answer:
B
— Integral controller
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Q. Which device is used to protect electrical equipment from overcurrent?
A.
Fuse
B.
Inductor
C.
Capacitor
D.
Transformer
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Solution
Fuses are protective devices that melt and break the circuit when the current exceeds a certain level, protecting equipment from overcurrent.
Correct Answer:
A
— Fuse
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Q. Which factor does NOT influence the bearing capacity of a foundation?
A.
Soil type
B.
Foundation depth
C.
Soil moisture content
D.
Foundation color
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Solution
Foundation color does not influence the bearing capacity; factors like soil type and moisture content do.
Correct Answer:
D
— Foundation color
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Q. Which factor is NOT typically considered in the design of transmission lines?
A.
Environmental impact
B.
Load demand
C.
Aesthetic appearance
D.
Local weather patterns
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Solution
While environmental impact, load demand, and local weather patterns are critical in transmission line design, aesthetic appearance is generally not a primary consideration.
Correct Answer:
C
— Aesthetic appearance
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Q. Which generation method is most commonly associated with the use of geothermal energy?
A.
Binary cycle power plants
B.
Photovoltaic cells
C.
Wind turbines
D.
Nuclear reactors
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Solution
Binary cycle power plants are a common method of generating electricity from geothermal energy, utilizing heat from the Earth to produce steam.
Correct Answer:
A
— Binary cycle power plants
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Q. Which of the following configurations can be used to create a differential amplifier?
A.
Inverting and non-inverting amplifiers
B.
Only inverting amplifiers
C.
Only non-inverting amplifiers
D.
Voltage followers
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Solution
A differential amplifier can be created using both inverting and non-inverting amplifier configurations.
Correct Answer:
A
— Inverting and non-inverting amplifiers
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Q. Which of the following configurations can be used to create a summing amplifier?
A.
Inverting amplifier
B.
Non-inverting amplifier
C.
Voltage follower
D.
Differential amplifier
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Solution
A summing amplifier can be created using an inverting amplifier configuration.
Correct Answer:
A
— Inverting amplifier
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Q. Which of the following describes a closed-loop control system?
A.
Output is independent of input.
B.
Feedback is used to compare output with input.
C.
No feedback is used.
D.
Only feedforward control is applied.
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Solution
A closed-loop control system uses feedback to compare the output with the desired input, allowing for adjustments.
Correct Answer:
B
— Feedback is used to compare output with input.
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Q. Which of the following factors affects the performance of a transmission line?
A.
Line length
B.
Conductor material
C.
Temperature
D.
All of the above
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Solution
The performance of a transmission line is influenced by multiple factors including line length, conductor material, and temperature.
Correct Answer:
D
— All of the above
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Q. Which of the following factors does NOT affect the consolidation rate of soil?
A.
Soil type
B.
Loading rate
C.
Pore water pressure
D.
Soil color
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Solution
Soil color does not affect the consolidation rate; factors like soil type, loading rate, and pore water pressure do.
Correct Answer:
D
— Soil color
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Q. Which of the following factors does NOT affect the performance of a transmission line?
A.
Line length
B.
Voltage level
C.
Weather conditions
D.
Type of transformer used
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Solution
The type of transformer used does not directly affect the performance of the transmission line itself.
Correct Answer:
D
— Type of transformer used
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Q. Which of the following factors does NOT affect the resistance of a transmission line?
A.
Material of the conductor
B.
Length of the line
C.
Temperature of the environment
D.
Voltage level of the line
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Solution
The resistance of a transmission line is affected by the material, length, and temperature, but not by the voltage level.
Correct Answer:
D
— Voltage level of the line
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Q. Which of the following indicates a stable system in a Bode plot?
A.
The gain margin is positive.
B.
The phase margin is negative.
C.
The gain increases without bound.
D.
The phase crosses -180 degrees.
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Solution
A stable system in a Bode plot is indicated by a positive gain margin, which means the system can tolerate some increase in gain before becoming unstable.
Correct Answer:
A
— The gain margin is positive.
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Q. Which of the following indicates a stable system in the context of Bode plots?
A.
The gain margin is negative.
B.
The phase margin is positive.
C.
The gain increases indefinitely.
D.
The phase crosses -180 degrees at a low frequency.
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Solution
A positive phase margin indicates that the system is stable, as it shows how much phase shift can be tolerated before instability occurs.
Correct Answer:
B
— The phase margin is positive.
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Q. Which of the following indicates a stable system in the root locus plot?
A.
All poles are in the right half-plane.
B.
All poles are in the left half-plane.
C.
Poles are on the imaginary axis.
D.
Poles are outside the unit circle.
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Solution
A stable system has all its poles located in the left half-plane of the complex plane.
Correct Answer:
B
— All poles are in the left half-plane.
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Q. Which of the following indicates an underdamped system in a second-order transfer function?
A.
Damping ratio less than 0.
B.
Damping ratio equal to 0.
C.
Damping ratio between 0 and 1.
D.
Damping ratio greater than 1.
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Solution
An underdamped system has a damping ratio between 0 and 1, resulting in oscillatory behavior.
Correct Answer:
C
— Damping ratio between 0 and 1.
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Q. Which of the following indicates that a system is stable?
A.
All poles of the transfer function are in the right half of the s-plane.
B.
All poles of the transfer function are in the left half of the s-plane.
C.
Poles are on the imaginary axis.
D.
Poles are complex with positive real parts.
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Solution
A system is stable if all poles of its transfer function are located in the left half of the s-plane.
Correct Answer:
B
— All poles of the transfer function are in the left half of the s-plane.
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Q. Which of the following is a characteristic of a closed-loop control system?
A.
It does not require a reference input.
B.
It uses feedback to compare the output with the desired input.
C.
It is always faster than an open-loop system.
D.
It cannot handle disturbances.
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Solution
A closed-loop control system uses feedback to compare the actual output with the desired input, allowing for adjustments.
Correct Answer:
B
— It uses feedback to compare the output with the desired input.
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Q. Which of the following is a characteristic of a FET?
A.
Current-controlled device
B.
Voltage-controlled device
C.
Requires biasing for operation
D.
Has a high input current
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Solution
FETs (Field Effect Transistors) are voltage-controlled devices, which means they control current flow based on the voltage applied to the gate.
Correct Answer:
B
— Voltage-controlled device
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Q. Which of the following is a characteristic of a JFET?
A.
It is voltage-controlled
B.
It is current-controlled
C.
It has a gate current
D.
It operates in the saturation region only
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Solution
A JFET (Junction Field Effect Transistor) is a voltage-controlled device, meaning the output current is controlled by the voltage applied to the gate.
Correct Answer:
A
— It is voltage-controlled
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Q. Which of the following is a characteristic of a MOSFET?
A.
Requires a continuous current to operate
B.
Has a gate that is insulated from the channel
C.
Is always on when powered
D.
Has low input impedance
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Solution
A MOSFET has a gate that is insulated from the channel, allowing for high input impedance.
Correct Answer:
B
— Has a gate that is insulated from the channel
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Q. Which of the following is a characteristic of a second-order underdamped system?
A.
No oscillations
B.
Oscillations with decreasing amplitude
C.
Oscillations with constant amplitude
D.
Instantaneous response
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Solution
A second-order underdamped system exhibits oscillations that gradually decrease in amplitude over time.
Correct Answer:
B
— Oscillations with decreasing amplitude
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Q. Which of the following is a characteristic of a stable system?
A.
All poles are in the right half of the s-plane.
B.
All poles are in the left half of the s-plane.
C.
Poles are on the imaginary axis.
D.
Poles can be anywhere in the s-plane.
Show solution
Solution
A stable system has all its poles located in the left half of the s-plane, ensuring that the system response decays over time.
Correct Answer:
B
— All poles are in the left half of the s-plane.
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Q. Which of the following is a characteristic of an open-loop control system?
A.
It requires feedback.
B.
It is less complex than closed-loop systems.
C.
It is always stable.
D.
It can automatically correct errors.
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Solution
Open-loop systems do not use feedback, making them generally less complex than closed-loop systems.
Correct Answer:
B
— It is less complex than closed-loop systems.
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Q. Which of the following is a characteristic of MOSFETs?
A.
They are current-controlled devices
B.
They have high input impedance
C.
They require a biasing current
D.
They are less sensitive to temperature changes
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Solution
MOSFETs are known for their high input impedance, making them suitable for various applications.
Correct Answer:
B
— They have high input impedance
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Q. Which of the following is a common application of a distribution transformer?
A.
Power generation
B.
Voltage stepping in transmission lines
C.
Supplying power to residential areas
D.
Industrial power supply
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Solution
Distribution transformers are commonly used to supply power to residential areas by stepping down the voltage from the transmission lines.
Correct Answer:
C
— Supplying power to residential areas
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Q. Which of the following is a common application of open-loop control systems?
A.
Temperature control in a furnace.
B.
Cruise control in vehicles.
C.
Washing machines on a fixed cycle.
D.
Robotic arms with sensors.
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Solution
Washing machines often operate on a fixed cycle without feedback, making them a typical example of an open-loop control system.
Correct Answer:
C
— Washing machines on a fixed cycle.
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Q. Which of the following is a common application of solar power generation?
A.
Pumped storage
B.
Photovoltaic systems
C.
Geothermal heating
D.
Nuclear fission
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Solution
Photovoltaic systems are commonly used to convert sunlight directly into electricity in solar power generation.
Correct Answer:
B
— Photovoltaic systems
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Q. Which of the following is a common application of transformers?
A.
Voltage regulation in power systems
B.
Signal amplification in audio systems
C.
Energy storage in batteries
D.
Frequency conversion in inverters
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Solution
Transformers are commonly used for voltage regulation in power systems to ensure stable voltage levels.
Correct Answer:
A
— Voltage regulation in power systems
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