Electrical control systems Archives - Page 5 of 10 - MCQ and Quiz for Exams

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

decrease

increase

be unaffected

any of the above

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

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

Phase-lead

Phase-lag

Both (A) and (B)

Either (A) and (B) E. None of the above

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

43. In force-voltage analogy, velocity is analogous to

current

charge

inductance

capacitance

Detailed SolutionIn force-voltage analogy, velocity is analogous to

44. In pneumatic control systems the control valve used as final control element converts

Pressure signal to electric signal

Pressure signal to position change

Electric signal to pressure signal

Position change to pressure signal

Detailed SolutionIn pneumatic control systems the control valve used as final control element converts

45. Is the reference input minus the primary feedback.

Manipulated variable

Zero sequence

Actuating signal

Primary feedback

Detailed SolutionIs the reference input minus the primary feedback.

46. Zero initial condition for a system means

input reference signal is zero

zero stored energy

ne initial movement of moving parts

system is at rest and no energy is stored in any of its components

Detailed SolutionZero initial condition for a system means

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

Closed loop system

Semiclosed loop system

Open system

None of the above

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

48. has tendency to oscillate.

Open loop system

Closed loop system

Both (A) and (B)

Neither (A) nor (B)

Detailed Solutionhas tendency to oscillate.

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

Disturbance

Command

Control element

Reference input

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

50. Which of the following is an open loop control system ?

Field controlled D.C. motor

Ward leonard control

motor B. Ward leonard control C. Metadyne

Stroboscope

Detailed SolutionWhich of the following is an open loop control system ?

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