Q.1
Which of the following can be used as a tacho generator in control systems?
  • a) Microsyn
  • b) DC servomotor
  • c) AC servomotor
  • d) Magnetic Amplifier
Q.2
Consider the function F (s)= 5/s(s2+3s+2), the initial value of f(t) is:
  • a) 5
  • b) 5/2
  • c) 5/3
  • d) 0
Q.3
An electric motor is developing 10KW at a speed of 900rpm. The torque available at the shaft is:
  • a) 106 N-m
  • b) 66 N-m
  • c) 1600 N-m
  • d) 90 N-m
Q.4
Assertion (A): Many of the linear control system transfer function do not have poles or zeroes in the right half s-plane.
  • a) Both A and R are true and R is correct explanation of A
  • b) Both A and R are true and R is not correct Explanation of A
  • c) A is True and R is false
  • d) A is False and R is true
Q.5
The tacho meter has sensitivity of 5V/1000rpm. The gain constant of the tacho meter is:
  • a) 0.48V/rad/sec
  • b) 0.048V/rad/sec
  • c) 4.8V/rad/sec
  • d) 48V/rad/sec
Q.6
The closed loop transfer function of a unity negative feedback system is 100/(s2+8s+100). Its open loop transfer function is:
  • a) 100/s+8
  • b) 1/s2+8s
  • c) 100/s2-8s
  • d) 100/s2+8s
Q.7
The impulse response of a linear LTI system is given as g (t) = e(-t)The transfer function of the system is equal to:
  • a) 1/s
  • b) 1/s(s+1)
  • c) 1/(s+1)
  • d) s/(s+1)
Q.8
In a closed loop for which the output is the speed of the motor, the output rate control can be used to:
  • a) Limit the speed of the motor
  • b) Limit the torque output of the motor
  • c) Reduce the damping of the system
  • d) Limit the acceleration of the motor
Q.9
In servo-system, the device used for derivative feedback is known as:
  • a) Synchro
  • b) Servomotor
  • c) Potentiometer
  • d) Tacho generator
Q.10
The transfer function of any stable system which has no zeros or poles in the right half of the s-plane is said to be:
  • a) Minimum phase transfer function
  • b) Non-minimum phase transfer function
  • c) Minimum phase frequency response function
  • d) Minimum gain transfer function
0 h : 0 m : 1 s