Practice Test: Question Set - 02
1. An amplidyne can give which of the following characteristics?
- (A) Constant current
- (B) Constant voltage
- (C) Constant current as well as constant voltage
- (D) Constant current, constant voltage and
constant power
2. A.C. servomotor is basically a
- (A) Universal motor
- (B) Single phase induction motor
- (C) Two phase induction motor
- (D) Three phase induction motor
3. In an open loop control system
- (A) Output is independent of control input
- (B) Output is dependent on control input
- (C) Only system parameters have effect on the
control output
- (D) None of the above
4. A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver?
- (A) Clutch
- (B) Eyes
- (C) Needle of the speedometer
- (D) Steering wheel
5. A.C. servomotor resembles
- (A) Two phase induction motor
- (B) Three phase induction motor
- (C) Direct current series motor
- (D) Universal motor
6. Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero?
- (A) The system is relatively stable
- (B) The system is highly stable
- (C) The system is highly oscillatory
- (D) None of the above
7. In force-voltage analogy, velocity is analogous to
- (A) Current
- (B) Charge
- (C) Inductance
- (D) Capacitance
8. By which of the following the system response can be tested better?
- (A) Ramp input signal
- (B) Sinusoidal input signal
- (C) Unit impulse input signal
- (D) Exponentially decaying signal
9. The position and velocity errors of a type-2 system are
- (A) Constant, constant
- (B) Constant, infinity
- (C) Zero, constant
- (D) Zero, zero
10. The phase lag produced by transportation relays
- (A) Is independent of frequency
- (B) Is inversely proportional to frequency
- (C) Increases linearly with frequency
- (D) Decreases linearly with frequency
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