CONTROL SYSTEM MCQs SET 25

CONTROL SYSTEM MCQs SET 25

1. Practically all the elements are:
a) Linear
b) Non-linear
c) Exponential
d) None of the mentioned
 

Answer: b

2. The need of assuming non-linear element as linear:
a) Simplicity of analysis and accuracy of results
b) Ease of calculations
c) Less time consuming
d) Mathematical tool available
 

Answer: d

3. A non-linear element can be treated as the linear element.
a) True
b) False
 

Answer: a

4. The system with the open loop transfer function 1/s(1+s) is:
a) Type 2 and order 1
b) Type 1 and order 1
c) Type 0 and order 0
d) Type 1 and order 2
 

Answer: d

5. The identical first order system have been cascaded non-interactively. The unit step response of the systems will be:
a) Overdamped
b) Underdamped
c) Undamped
d) Critically damped
 

Answer: d
6. A third order system is approximated to an equivalent second order system. The rise time of this approximated lower order system will be:
a) Same as the original system for any input
b) Smaller than the original system for any input
c) Larger than the original system for any input
d) Larger or smaller depending on the input
 

Answer: b

7. A system has a single pole at origin. Its impulse response will be:
a) Constant
b) Ramp
c) Decaying exponential
d) Oscillatory
 

Answer: a
28. When the period of the observation is large, the type of the error will be:
a) Transient error
b) Steady state error
c) Half-power error
d) Position error constant
 

Answer: b
9. When the unit step response of a unity feedback control system having forward path transfer function G (s) =80/s(s+18)?
a) Overdamped
b) Critically damped
c) Under damped
d) Un Damped oscillatory
 

Answer: a
10. With negative feedback in a closed loop control system, the system sensitivity to parameter variation:
a) Increases
b) Decreases
c) Becomes zero
d) Becomes infinite
 

Answer: b