Electrical control systems

11. In a stable control system saturation can cause which of the following ?

Low-level oscillations
High-level oscillations
Conditional stability
Overdamping

Detailed SolutionIn a stable control system saturation can cause which of the following ?

12. Phase margin of a system is used to specify which of the following ?

Frequency response
Absolute stability
Relative stability
Time response

Detailed SolutionPhase margin of a system is used to specify which of the following ?

13. Transfer function of a system is used to calculate which of the following ?

The order of the system
The time constant
The output for any given input
The steady state gain

Detailed SolutionTransfer function of a system is used to calculate which of the following ?

14.

universal motor
single phase induction motor
servomotor is basically a A. universal motor B. single phase induction motor C. two phase induction motor
three phase induction motor

Detailed Solution

15. In a system low friction coefficient facilitates

Reduced velocity lag error
Increased velocity lag error
Increased speed of response
Reduced time constant of the system

Detailed SolutionIn a system low friction coefficient facilitates

16. Mass, in force-voltage analogy, is analogous to

charge
current
inductance
resistance

Detailed SolutionMass, in force-voltage analogy, is analogous to

17. The transient response, with feedback system,

rises slowly
rises quickly
decays slowly
decays quickly

Detailed SolutionThe transient response, with feedback system,

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

Band width
Overall gain
Distortion
Instability

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

19. The viscous friction co-efficient, in force-voltage analogy, is analogous to

charge
resistance
reciprocal of inductance
reciprocal of conductance E. none of the above

Detailed SolutionThe viscous friction co-efficient, in force-voltage analogy, is analogous to

20. For open control system which of the following statements is incorrect ?

Less expensive
Recalibration is not required for maintaining the required quality of the output
Construction is simple and maintenance easy
Errors are caused by disturbances

Detailed SolutionFor open control system which of the following statements is incorrect ?

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