Control System Engineering MCQs | Page - 1

M

Mr. Dubey • 100.64K Points
Coach

Q. What is the algebraic sum of the reference input and feedback?

• (A) error signal
• (B) error detector
• (C) controlled system
• (D) controlled output

Show Answer Discuss Share

Correct : Option (A)

Explanation:

in the block diagram of a basic control system we see that the reference input is passed through error detector or comparator. the signal which leaves the same is the algebraic sum of reference input and feedback as the feedback wire is connected to the detector, so we call it error

M

Mr. Dubey • 100.64K Points
Coach

Q. Feedback control systems are referred to as closed loop systems.

• (A) true
• (B) false
• (C) ---
• (D) ---

Show Answer Discuss Share

Correct : Option (A)

Explanation:

feedback control systems are also referred to as closed loop systems. in a closed loop, the actuating error signals, which is the difference between the input signal and

M

Mr. Dubey • 100.64K Points
Coach

Q. Which principle does the linear system follow?

• (A) principle of energy conservation
• (B) principle of mass conservation
• (C) principle of electromagnetism
• (D) principle of superposition

Show Answer Discuss Share

Correct : Option (D)

Explanation:

a linear system is one who obeys the principle of superposition. the principle of superposition states that the response produced by simultaneous application of two different forcing functions is equal to the sum of individual responses.

M

Mr. Dubey • 100.64K Points
Coach

Q. control systems have unpredictable & non-repeatable.

• (A) static
• (B) dynamic
• (C) deterministic
• (D) stochastic

Show Answer Discuss Share

Correct : Option (D)

Explanation:

stochastic control systems are those who have unpredictable and non- repeatable response due to involvement of random parameters. static systems is the

M

Mr. Dubey • 100.64K Points
Coach

Q. The pressure inside the furnace is measured by

• (A) gauge
• (B) thermometer
• (C) manometer
• (D) barometer

Show Answer Discuss Share

Correct : Option (A)

Explanation:

the pressure inside the furnace is measured by pressure gauge. in case the pressure increases or decreases beyond the desired value, the controller and the actuator will cause a change in the position of the damper.

M

Mr. Dubey • 100.64K Points
Coach

Q. On what difference does the pneumatic system works?

• (A) speed
• (B) pressure
• (C) area
• (D) length

Show Answer Discuss Share

Correct : Option (B)

Explanation:

a pneumatic system works due to pressure difference of air or any other gas. air at a pressure, pi is injected through the input manifold. it also consists of mass, coefficient of viscous friction and spring constant and the pressure difference created due to that, gives rise to pneumatic system.

M

Mr. Dubey • 100.64K Points
Coach

Q. In a thermal system, the temperature of the medium is

• (A) increasing
• (B) decreasing
• (C) zero
• (D) uniform

Show Answer Discuss Share

Correct : Option (D)

Explanation:

to analyze a thermal system and determine its transfer function the temperature of the medium should be uniform. if the temperature is varying or zero

M

Mr. Dubey • 100.64K Points
Coach

Q. How many parameters does process control refer to?

• (A) 1
• (B) 3
• (C) 5
• (D) 7

Show Answer Discuss Share

Correct : Option (C)

Explanation:

process control refers to control of five parameters which are level, flow, pressure, temperature, acidity of the process variable. a particular parameter has only one desired value.

M

Mr. Dubey • 100.64K Points
Coach

Q. What is the effect of feedback in the overall gain of the system?

• (A) increases
• (B) decreases
• (C) zero
• (D) no change

Show Answer Discuss Share

Correct : Option (B)

Explanation:

the feedback reduces the overall gain of the system. as soon as we introduce feedback in the system to make the system stable, gain is reduced.

M

Mr. Dubey • 100.64K Points
Coach

Q. In a temperature control system, what conversion in signal takes place?

• (A) digital to analog
• (B) analog to digital
• (C) error to digital
• (D) error to analog

Show Answer Discuss Share

Correct : Option (B)

Explanation:

in a temperature control system, analog to digital conversion of signals take place. automatic systems don’t understand analog signals as they only take digital inputs in the form of 0 & 1 so we use a analog to digital converter which converts the signal.

Jump to Go