CONTROL SYSTEM MCQs SET 30

CONTROL SYSTEM MCQs SET 30

1. Linear lumped parameter models are not valid under situations as:
a) Transmission pipe between the hydraulic pump and the motor causes a time lag in transportation of oil from pump to motor
b) Transmission of heat by conduction or convection produces serious transportation lag
c) Both of the mentioned
d) None of the mentioned
 

Answer: c

72. Practically all the systems have transportation lag:
a) True
b) False
 

Answer: b

3. Transportation lag causes:
a) Instability in system
b) Stability in system
c) System remains unaffected
d) Bandwidth increases
 

Answer: a

4. Scientist Bode have contribution in:
a) Asymptotic plots
b) Polar plots
c) Root locus technique
d) Constant M and n circle
 

Answer: a
5. Scientist Evans have contribution in:
a) Asymptotic plots
b) Polar plots
c) Root locus technique
d) Constant M and n circle
 

Answer: c

6. Scientist Nyquist have contribution in:
a) Asymptotic plots
b) Polar plots
c) Root locus technique
d) Constant M and n circle
 

Answer: b

7. For a stable closed loop system, the gain at phase crossover frequency should always be:
a) < 20 dB
b) < 6 dB
c) > 6 dB
d) > 0 dB
 

Answer: d

8. Which one of the following methods can determine the closed loop system resonance frequency operation?
a) Root locus method
b) Nyquist method
c) Bode plot
d) M and N circle
 

Answer: d

9. If the gain of the open loop system is doubled, the gain of the system is:
a) Not affected
b) Doubled
c) Halved
d) One fourth of the original value
 

Answer: a

10. Which one of the following statements is correct?
Nichol’s chart is useful for the detailed study of:
a) Closed loop frequency response
b) Open loop frequency response
c) Close loop and open loop frequency responses
d) None of the mentioned
 

Answer: a