(A) slip ring motor
(B) Alternator
(C) Squirrel Cage
(D) Stepper motor
Answer- (B)
2. On what principle does the alternator operate?
(A) Faraday's law
(B) Lenz's law
(C) Law of Helix
(D) None
Answer- (A)
3. What are the basic requirements of an alternator?
(A) 3
(B) 5
(C) 6
(D) 4
Answer- (D)
4. How many parts does an alternator consist of?
(A) 3
(B) 5
(C) 6
(D) 4
Answer- (D)
5. The alternator body or frame is made up of
(A) Cast iron
(B) Cast Steel
(C) Copper
(D) Both A and B
Answer- (D)
6. Whose job is it to keep all parts of a machine safe?
(A) Stator
(B) rotor
(C) body or frame
(D) armature
Answer- (C)
7. Who is responsible for providing paths for magnetic force lines?
(A) Stator
(B) rotor
(C) body or frame
(D) armature
Answer- (C)
8. Where is the armature core in an alternator?
(A) on the stator
(B) on the rotor
(C) body or frame
(D) on the armature
Answer- (A)
9. On which part of the alternator are the slots cut?
(A) Outer part
(B) on the rotor
(C) Interior
(D) on the stator
Answer- (C)
10. How to reduce the value of losses armature core is made of varnished of silicon steel
(A) Iron losses
(B) Eddy current losses
(C) hysteresis losses
(D) All of the above
Answer- (B)
11 What are the main types of slots in an alternator?
(A) 2
(B) 5
(C) 6
(D) 4
Answer- (A)
12. Which slots are commonly used in 12 alternators
(A) closed
(B) semi open
(C) Open
(D) Semi-closed
Answer- (C)
13. Which is the area of alternator there field coils is installed
(A) on the stator
(B) on the rotor
(C) body or frame
(D) on the armature
Answer- (B)
14. The part that establishes the magnetic field in alternators is called
(A) Stator
(B) rotor
(C) body or frame
(D) Ornamentation
Answer- (B)
15. What type of rotor is an alternator with low and medium rotation speed of rotor?
(A) Salient pole rotor
(B) Shaded pole rotor
(C) Both A and B
(D) None
Answer- (A)
16.What is used to make salient pole rotor?
(A) Iron stampings
(B) Steel Stampings
(C) Aluminum stampings
(D) Copper stampings
Answer- (B)
17. Which type of rotor produces noise while moving
(A) Salient pole rotor
(B) Shaded pole rotor
(C) Wound rotor
(D) None
Answer- (A)
18. How many poles are there in salient pole rotor?
(A) 1 to 4
(B) 6 to 40
(C) 5 to 40
(D) 2 to 40
Answer- (B)
19. The speed of salient pole rotor is
(A) 375 to 1000 RPM
(B) 500 to 1000 RPM
(C) 345 to 1000 RPM
(D) 325 to 1000 RPM
Answer- (A)
20. Salient pole rotor is used in which alternator
(A) Thermal alternator
(B) Wind alternator
(C) Hydro alternator
(D) All of the above
Answer- (C)