# Starters - Electrical Engineering (MCQ) questions and answers

1)   For controlling the initial inrush current,

a. Reduced voltage is applied to the stator during the starting period
b. Reduced voltage is applied to the stator when the motor is running at rated speed
c. Either (a) or (b)
d. None of these
 Answer  Explanation ANSWER: Reduced voltage is applied to the stator during the starting period Explanation: No explanation is available for this question!

2)   If induction motor is direct switched-on then it will develop

a. 1.5 times their full load torque
b. 1.5 to 2.5 times their full load torque
c. 2.5 times their full load torque
d. 1.5 to 5 times their full load torque
 Answer  Explanation ANSWER: 1.5 to 2.5 times their full load torque Explanation: No explanation is available for this question!

3)   In DOL fuses are provided to protect against

a. Short circuit protection
b. Over voltage
c. Over current
 Answer  Explanation ANSWER: Short circuit protection Explanation: No explanation is available for this question!

4)   In India, direct - on - line starter can be used for 3 - phase squirrel cage induction motor up to the rating of

a. 5 HP
b. 10 HP
c. 15 HP
d. 25 HP
 Answer  Explanation ANSWER: 5 HP Explanation: No explanation is available for this question!

5)   Reduced voltage can be applied across the stator circuit by

a. Using an autotransformer
b. Connecting resistor in series with stator winding
c. Connecting inductor in series with stator winding
d. All of these
 Answer  Explanation ANSWER: All of these Explanation: No explanation is available for this question!

6)   If an induction motor is initially connected in delta and then reconnected in star then the current drawn will become

a. Thrice of the current drawn when connected in delta
b. Twice of the current drawn when connected in delta
c. One third of the current drawn when connected in delta
d. Half of the current drawn when connected in delta
 Answer  Explanation ANSWER: One third of the current drawn when connected in delta Explanation: No explanation is available for this question!

7)   3 - point starter is used to start the

a. Series motor
b. Shunt motor
c. Compound motor
d. Only (b) and (c)
 Answer  Explanation ANSWER: Only (b) and (c) Explanation: No explanation is available for this question!

8)   In four - point starter, the no volt release is connected across the

a. Supply line through a protective resistance
b. In series with field circuit through a protective resistance
c. Either (a) or (b)
d. None of these
 Answer  Explanation ANSWER: Supply line through a protective resistance Explanation: No explanation is available for this question!

9)   The overload release protects the motor against

a. Over voltage
b. Over current