1. . ________ is induced in an alternator.
(A) DC
(B) Any of above
(C) Pulsating DC
(D) AC
2. . The direction of voltage are ________ in alternator.
(A) Pulsating
(B) Varying
(C) Constant
(D) None
3. . Alternator does not have _________
(A) Slip ring
(B) All of above
(C) Field winding
(D) Commutator
4. . The exterior shell of an alternator is _________
(A) Stator frame
(B) Shell
(C) Stator winding
(D) Rotor
5. . Frame is made up of _________
(A) Both a & b
(B) Cast iron
(C) Wrought iron
(D) Mild steel
6. . If the stator winding is closed then _________ connections are formed.
(A) Star
(B) Delta
(C) Star-delta
(D) Delta-star
7. . The rotating part of alternator is _________
(A) Stator
(B) Stator winding
(C) Rotor winding
(D) Rotor
8. . The stationary part of alternator is _________
(A) Rotor
(B) Stator
(C) Commutator
(D) Brushes
9. . Rotor of alternator is of ________ types.
(A) Three
(B) Two
(C) Four
(D) Odd
10. . The salient pole type has more length than its ________
(A) Radius
(B) Width
(C) Diameter
(D) Thickness
11. . The smooth cylindrical rotor has more diameter than its _________
(A) Length
(B) Width
(C) Thickness
(D) Radius
12. . Alternators are _________ in size than DC generators.
(A) Smaller
(B) Bigger
(C) Equal
(D) All of above
13. . There are ________ methods of excitation.
(A) Four
(B) Three
(C) Two
(D) Six
14. . These require ________ maintenance.
(A) Less
(B) More
(C) No
(D) None of above
15. . In three phase power, each phase is at ________ from other.
(A) 60º
(B) 90º
(C) 120º
(D) 180º
16. . The frequency is ________ by increasing the speed.
(A) No change
(B) Decreased
(C) Increased
(D) Any one