1. . A motor converts electrical energy to ________ energy.
(A) Electrical
(B) Any of above
(C) Wind
(D) Mechanical
2. . There is __________ difference b/w motor and generator regarding construction.
(A) Current
(B) Power
(C) emf
(D) No
3. . Motors can be drip proof, semi guarded and _________ types.
(A) heat proof
(B) water resistance
(C) guarded
(D) All
4. . Direction of mechanical force produced in motor can be found by ___
(A) Coulomb's law
(B) Fleming's left hand rule
(C) Faraday's law
(D) none of above
5. . DC motor can be run as ________
(A) Induction motor
(B) Servo motor
(C) DC generator
(D) Stepper motor
6. . Back emf is also known as ________
(A) counter emf
(B) reverse recovery emf
(C) back current
(D) surge emf
7. . The voltage equation of motor is _________
(A) V = Eb + Ia²R
(B) V = Eb + IaRa/f
(C) V = Eb + IaRa
(D) V = Eb + (IaR)²
8. . DC motors have _________ types.
(A) Two
(B) Three
(C) Four
(D) Five
9. . Series motors are used in ________ torque applications.
(A) Low
(B) For all
(C) Medium
(D) High
10. . The field winding is in _________ of a shunt motors to armature.
(A) Shunt
(B) Series
(C) Compound
(D) long shunt
11. . Motor has both series and shunt field windings.
(A) Series
(B) Shunt
(C) Compound
(D) Induction
12. . τ ____________
(A) Ia
(B) Ra
(C) I/f
(D) Rm
13. . The speed of dc motor be controlled by ________ methods.
(A) Three
(B) Two
(C) Four
(D) Five
14. . Flux is _________ to increase the speed in field control method.
(A) Decreased
(B) Increased
(C) Constant
(D) Fluctuating