Q.1
Tacho generators are ______________
  • a) Zero-order system
  • b) First-order system
  • c) Second order system
  • d) None of the mentioned
Q.2
Current to force and current to torque conversion is possible only for a constant current source.
  • a) True
  • b) False
Q.3
Which of the following represents transfer function of tacho-generators?
  • a) Kg
  • b) 1/Kg
  • c) SKg
  • d) S2Kg
Q.4
Transfer function of force motor is _____________
  • a) Kg
  • b) SKg
  • c) Kf
  • d) SKf
Q.5
Most electrical indicating instruments are electromechanical systems since ________________
  • a) They are used to measure electric component
  • b) They are more precise
  • c) They require no external power to operate
  • d) They convert electrical quantity to mechanical quantity
Q.6
Torque developed by a DC motor will be proportional to armature current.
  • a) True
  • b) False
Q.7
Which of the following is the correct conversion in an electro mechanical system?
  • a) Electrical to electrical
  • b) Electrical to mechanical
  • c) Mechanical to electrical
  • d) Both electrical to mechanical and mechanical to electrical
Q.8
For a constant field dc motor, what is the relation between the mechanical time constant and armature resistance?
  • a) Direct proportionality
  • b) Inverse proportionality
  • c) Double
  • d) Equal
Q.9
Which of the following represents for torque speed characteristic for dc motor?
  • a) Positive slope
  • b) Negative slope
  • c) Slope zero
  • d) None of the mentioned
Q.10
What is the relation between eddy current damping coefficient and resistance in PMMC device?
  • a) Direct proportionality
  • b) Inverse proportionality
  • c) Constant
  • d) None of the mentioned
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