Electrical control systems

1. The capacitance, in force-current analogy, is analogous to

momentum
velocity
displacement
mass

Detailed SolutionThe capacitance, in force-current analogy, is analogous to

2. In thermal-electrical analogy charge is considered analogous to

heat flow
reciprocal of heat flow
reciprocal of temperature
temperature E. none of the above

Detailed SolutionIn thermal-electrical analogy charge is considered analogous to

3. Which of the following statements is not necessarily correct for open control system ?

Input command is the sole factor responsible for providing the control action
Presence of non-linearities causes malfunctioning
Less expensive
Generally free from problems of non-linearities

Detailed SolutionWhich of the following statements is not necessarily correct for open control system ?

4. An increase in gain, in most systems, leads to

smaller damping ratio
larger damping ratio
constant damping ratio
none of the above

Detailed SolutionAn increase in gain, in most systems, leads to

5. Which of the following can be measured by the use of a tachogenerator ?

Acceleration
Speed
Speed and acceleration
Displacement E. None of the above

Detailed SolutionWhich of the following can be measured by the use of a tachogenerator ?

6. From which of the following transfer function can be obtained ?

Signal flow graph
Analogous table
Output-input ratio
Standard block system E. None of the above

Detailed SolutionFrom which of the following transfer function can be obtained ?

7.

two phase induction motor
Three phase induction motor
servomotor resembles A. two phase induction motor B. Three phase induction motor C. direct current series motor
universal motor

Detailed Solution

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

parabolic
ramp
impulse
step

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

9. Which of the following is the non-linearity caused by servomotor ?

Static friction
Backlash
Saturation
None of the above

Detailed SolutionWhich of the following is the non-linearity caused by servomotor ?

10. With feedback _____ increases.

system stability
sensitivity
gain
effects of disturbing signals

Detailed SolutionWith feedback _____ increases.

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