Explore topic-wise MCQs in Electrical Engineering.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

In closed loop control system, with positive value of feedback gain the overall gain of the system will

A. decrease
B. increase
C. be unaffected
D. any of the above
Answer» B. increase
Discussion
2.

A control system in which the control action is somehow dependent on the output is known as

A. Closed loop system
B. Semiclosed loop system
C. Open system
D. None of the above
Answer» B. Semiclosed loop system
Discussion
3.

A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

A. Clutch
B. Eyes
C. Needle of the speedometer
D. Steering wheel
Answer» D. Steering wheel
Discussion
4.

By which of the following the control action is determined when a man walks along a path ?

A. Brain
B. Hands
C. Legs
D. Eyes
Answer» E.
Discussion
5.

As a result of introduction of negative feedback which of the following will not decrease ?

A. Band width
B. Overall gain
C. Distortion
D. Instability
Answer» B. Overall gain
Discussion
6.

When the initial conditions of a system are specified to be zero it implies that the system is

A. at rest without any energy stored in it
B. working normally with reference input
C. working normally with zero reference input
D. at rest but stores energy
Answer» E.
Discussion
7.

The transfer function technique is considered as inadequate under which of the following conditions ?

A. Systems having complexities and non-linearities
B. Systems having stability problems
C. Systems having multiple input dis turbances
D. All of the above
Answer» E.
Discussion
8.

Due to which of the following reasons excessive bond width in control systems should be avoided ?

A. It leads to slow speed of response
B. It leads to low relative stability
C. Noise is proportional to band width
D. None of the above
Answer» D. None of the above
Discussion
9.

A signal other than the reference input that tends to affect the value of controlled variable is known as

A. disturbance
B. command
C. control element
D. reference input
Answer» B. command
Discussion
10.

Which of the following is the best method for determining the stability and transient response ?

A. Root locus
B. Bode plot
C. Nyquist plot
D. None of the above
Answer» B. Bode plot
Discussion
11.

On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

A. Frequency
B. Loop gain
C. Forward gain
D. All of the above
Answer» E.
Discussion
12.

Static error co-efficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.

A. acceleration
B. velocity
C. position
D. all of the above
Answer» E.
Discussion
13.

Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

A. The system is relatively stable
B. The system is highly stable
C. The system is highly oscillatory
D. None of the above
Answer» D. None of the above
Discussion
14.

The temperature, under thermal and electrical system analogy, is considered analogous to

A. voltage
B. current
C. capacitance
D. charge
Answer» B. current
Discussion
15.

Velocity error constant of a system is measured when the input to the system is unit _______ function.

A. parabolic
B. ramp
C. impulse
D. step
Answer» C. impulse
Discussion
16.

If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is

A. not necessarily stable
B. stable
C. unstable
D. always unstable
Answer» B. stable
Discussion
17.

In order to increase the damping of a badly underdamped system which of following compensators may be used ?

A. Phase-lead
B. Phase-lag
C. Both (a) and (b)
D. Either (a) and (b)
Answer» B. Phase-lag
Discussion