CONTROL SYSTEM SET 17

CONTROL SYSTEM SET 17

1. If feedback is introduced in the system the transient response
a) Does not very
b) Decays very fast
c) Decays slowly
d) Dies off
 

Ans: (b)
 

2. Main difference between servomotor and standard motor is that
a) Servomotor has low inertia and higher starting torque
b) Servomotor has inertia low starting torque
c) Servomotor has high inertia and high starting torque
d) None of these
 

Ans: (b)
 

3. The frequency range over which response of the system is within acceptable units is called the system
a) Band width
b) Modulation frequency
c) Demodulation frequency
d) Carrier frequency
 

Ans: (a)
 

4. Self-balancing instrument uses
a) D.C. servomotor
b) A.C. servomotor
c) Tachometer
d) Magnetic amplifier
 

Ans: (b)
 

5. Lead compensation in the system add
a) Zeros
b) Poles
c) Both (a) and (b)
d) None of these
 

Ans: (b)
 

6. In type 1 system steady state acceleration error is
a) 0
b) 1
c) Infinity
d) None of these
 

Ans: (c)
 

7. Lead lag compensation improve
a) Transient response of the system
b) Steady state response of the system
c) Both (a) and (b)
d) None of these
 

Ans: (c)
 

8. If poles of the system are lying on the imaginary axis in s-plane, then system will be
a) Stable
b) Marginally stable
c) Conditionally stable
d) Unstable
 

Ans: (b)
 

9. If open loop transfer function of a system is G(s) H(s) = K/(S(1+T1 S)(1+T2 S)) then system will be
a) Unstable
b) Conditionally stable
c) Stable
d) Marginally stable
 

Ans: (c)
 

10. According to Hurwitz criterion the characteristic equation s2+ 8 s3+18 s2+16 s + 5 = 0 is
a) Unstable
b) Marginally stable
c) Conditionally stable
d) Unstable
 

Ans: (a)