CONTROL SYSTEM SET 10

CONTROL SYSTEM SET 10

1. Which of the following is the non-linearity caused by servomotor ?
(a) Static friction
(b) Backlash
(c) Saturation
(d) None of the above
 
Ans: c
 
2. ___ can be extended to systems which are time-varying ?
(a) Bode-Nyquist stability methods
(b) Transfer functions
(c) Root locus design
(d) State model representatives
 
Ans: d
 
3. When the initial conditions of a system are specified to be zero it implies that the system is
(a) at rest without any energy stored in it
(b) working normally with reference input
(c) working normally with zero reference input
(d) at rest but stores energy
 
Ans: d
 
4. Which of the following is electromechanical device?
(a) Induction relay
(b) Thermocouple
(c) LVDT
(d) Any of the above
(e) None of the above
 
Ans: c
 
5. 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
 
Ans: c
 
6. If the gain of the critical damped system is increased it will behave as
(a) oscillatory
(b) critically damped
(c) overdamped
(d) underdamped
(e) none of the above
 
Ans: d
 
7. In a control system integral error compensation _______    steady state error
(a) increases
(b) minimizes
(c) does not have any effect on
(d) any of the above
 
Ans: b
 
8. With feed back _____ reduces.
(a) system stability
(6) system gain
(c) system stability and gain
(d) none of the above
 
Ans: b
 
9. 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
(e) None of the above
 
Ans: d
 
10. Which of the following can be measured by LVDT?
(a) Displacement
(b) Velocity
(c) Acceleration
(d) Any of the above
 
Ans: d