Practice Test: Question Set - 06
1. In electrical-pneumatic system analogy the current is considered analogous to
- (A) Velocity
- (B) Pressure
- (C) Air flow
- (D) Air flow rate
2. Signal will become zero when the feedback signal and reference signs are equal.
- (A) Input
- (B) Actuating
- (C) Feedback
- (D) Reference
3. With feedback _______ increases.
- (A) System stability
- (B) Sensitivity
- (C) Gain
- (D) Effects of disturbing signals
4. Velocity error constant of a system is measured when the input to the system is unit ________ function.
- (A) Parabolic
- (B) Ramp
- (C) Impulse
- (D) Step
5. Which of the following can be measured by the use of a tachogenerator?
- (A) Acceleration
- (B) Speed
- (C) Speed and acceleration
- (D) Displacement
6. A differentiator is usually not a part of a control system because it
- (A) Reduces damping
- (B) Reduces the gain margin
- (C) Increases input noise
- (D) Increases error
7. Which of the following is an open loop control system?
- (A) Field controlled D.C. motor
- (B) Ward Leonard control
- (C) Metadyne
- (D) Stroboscope
8. ________ Increases the steady state accuracy.
- (A) Integrator
- (B) Differentiator
- (C) Phase lead compensator
- (D) Phase lag compensator
9. In a stable control system backlash can cause which of the following?
- (A) Under-damping
- (B) Over-damping
- (C) Poor stability at reduced values of open loop gain
- (D) Low-level oscillations
10. The transient response of a system is mainly due to
- (A) Inertia forces
- (B) Internal forces
- (C) Stored energy
- (D) Friction
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