1. DOL starter is used for:
(A) Induction motor
(B) Squirrel cage motor
(C) DC compound motor
(D) Universal motor
2. How many magnetic contactors are used in star delta starter:
(A) 2
(B) 5
(C) 4
(D) 3
3. The speed of motor in star connection is:
(A) Slow
(B) High
(C) Full
(D) None of these
4. VFD stands for:
(A) Variable air volume
(B) Variable frequency motor
(C) None of these
(D) Variable frequency drive
5. Soft starter is used for:
(A) Both b & c
(B) As a starting device
(C) As a protection device
(D) As a measuring device
6. Function of inverter is:
(A) Converts DC supply to AC supply
(B) Converts AC supply to DC supply
(C) To control power factor
(D) None of these
7. DC drive is used for:
(A) DC generators
(B) AC motors
(C) DC motors
(D) All of these
8. Soft starter is a:
(A) Speed controlling device
(B) Protecting device
(C) Measuring device
(D) All of these
9. In general, which rating of the motor is operated in star delta starter:
(A) 1 Horse power
(B) 2 Horse power
(C) 15 Horse power
(D) 3 Horse power
10. Speed of AC motor can be controlled by:
(A) Soft starter
(B) VFD
(C) Magnetic contactor
(D) MCB