Explore topic-wise MCQs in Control Systems.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.

1.

The open loop transfer function of a plant is given as, G(s) =1/s^2-1. If the plant is operated in unity feedback configuration, then the lead compensator that can stabilize the control system is:

A. 10(s-1)/(s+2)
B. 10(s+4)/(s+2)
C. 10(s+2)/(s+10)
D. 10(s+2)/(s+10)
Answer» B. 10(s+4)/(s+2)
Discussion
2.

A composite R-C network yielded the following transfer function when calculated from its components:T(s) = 1+21s+20s2/1+11s+10s2. This network can be used as which one of the following?

A. Phase lead compensator
B. Phase lag compensator
C. Lag lead compensator
D. None of the mentioned
Answer» B. Phase lag compensator
Discussion
3.

Consider the following systems:System 1: G(s) =1/ (2s+1) and System 2: G(s) =1/ (5s+1)The true statement regarding the system is:

A. Bandwidth of the system 1 is greater than the bandwidth of the system 2
B. Bandwidth of the system 1 is lower than the bandwidth of the system 2
C. Bandwidth of both the systems are same
D. Bandwidth of both the systems are infinite
Answer» B. Bandwidth of the system 1 is lower than the bandwidth of the system 2
Discussion
4.

Operations performed by electronic controllers:

A. Flexible operations
B. High torque high speed operations
C. Fire and explosion proof operation
D. All of the mentioned
Answer» B. High torque high speed operations
Discussion
5.

Operations performed by hydraulic controllers:

A. Flexible operations
B. High torque high speed operations
C. Fire and explosion proof operation
D. All of the mentioned
Answer» C. Fire and explosion proof operation
Discussion
6.

A_COMPOSITE_R-C_NETWORK_YIELDED_THE_FOLLOWING_TRANSFER_FUNCTION_WHEN_CALCULATED_FROM_ITS_COMPONENTS:?$

A. = 1+21s+20s<sup>2</sup>/1+11s+10s<sup>2</sup>. This network can be used as which one of the following?
B. Phase lead compensator
C. Phase lag compensator
D. Lag lead compensator
Answer» B. Phase lead compensator
Discussion
7.

The open loop transfer function of a plant is given as, G(s) =1/s^2-1. If the plant is operated in unity feedback configuration, then the lead compensator that can stabilize the control system is:$

A. 10(s-1)/(s+2)
B. 10(s+4)/(s+2)
C. 10(s+2)/(s+10)
D. 10(s+2)/(s+10)
Answer» B. 10(s+4)/(s+2)
Discussion
8.

What is the effect of phase lag compensation on the performance of a servo system?

A. For a given relative stability, the velocity constant is increased
B. For a given relative stability, the velocity constant is decreased
C. The bandwidth of the system is increased
D. The time response is made faster
Answer» B. For a given relative stability, the velocity constant is decreased
Discussion
9.

With regard to the filtering capacity the lead compensator and lag compensator are respectively:

A. Low pass and high pass filter
B. High pass and low pass filter
C. Both high pass filter
D. Both low pass filters
Answer» C. Both high pass filter
Discussion
10.

Consider the following systems:

A. =1/ (2s+1) and System 2: G(s) =1/ (5s+1)
B.
C. Bandwidth of the system 1 is greater than the bandwidth of the system 2
Answer» B.
Discussion
11.

The compensator G(s) =5(1+0.3s)/1+0.1s would provide a maximum phase shift of:

A. 20°
B. 30°
C. 45°
D. 60°
Answer» C. 45¬¨¬®‚Äö√†√ª
Discussion
12.

Operations performed by pneumatic controllers:

A. Flexible operations
B. High torque high speed operations
C. Fire and explosion proof operation
D. All of the mentioned
Answer» D. All of the mentioned
Discussion
13.

Which of the following is not the correct reason to select feedback compensation over cascaded one?

A. No amplification is required as the energy transfer is from higher to lower level.
B. Suitable devices are not available for compensation(series)
C. It is economical
D. Provides greater stiffness against load disturbances
Answer» D. Provides greater stiffness against load disturbances
Discussion