1) At what angle difference is the main winding and the start winding separated in a spilt phase capacitor start induction motor?
a. 45° electrical
b. 90° electrical
c. 45° mechanical
d. 90° mechanical
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Answer
Explanation
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ANSWER: 90° electrical
Explanation:
No explanation is available for this question!
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2) Which among these is the application of universal motors?
a. Vacuum cleaners
b. Fans
c. Hair dryers
d. Washing machines
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Answer
Explanation
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ANSWER: Vacuum cleaners
Explanation:
No explanation is available for this question!
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3) What is the typical value of the capacitor used in ‘capacitor start capacitor run’ induction motor?
a. 5 μ F
b. 40 μ F
c. 300 μ F
d. 1000 μ F
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Answer
Explanation
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ANSWER: 300 μ F
Explanation:
No explanation is available for this question!
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4) What is the value of the permanently connected capacitor in capacitor start capacitor run induction motor?
a. 40 μ F
b. 5 μ F
c. 300 μ F
d. 1000 μ F
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Answer
Explanation
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ANSWER: 40 μ F
Explanation:
No explanation is available for this question!
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5) At what percentage of the rated speed is the starting winding of a capacitor start induction disconnected with the help of a centrifugal switch?
a. 50 % of the rated speed
b. 70 % of the rated speed
c. 25 % of the rated speed
d. 5 % of the rated speed
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Answer
Explanation
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ANSWER: 70 % of the rated speed
Explanation:
No explanation is available for this question!
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6) What is the speed range of poly phase Commutator motors?
a. 0.5 N s to 1 N s
b. 0.5 N s to 1.5 N s
c. 0.1 N s to 2 N s
d. 0.5 N s to 2.5 N s
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Answer
Explanation
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ANSWER: 0.5 Ns to 1.5 Ns
Explanation:
No explanation is available for this question!
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7) Which among these is an application of single phase synchronous AC motor?
a. Small drill
b. Large drill
c. Dishwasher
d. Sewing machine
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Answer
Explanation
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ANSWER: Dishwasher
Explanation:
No explanation is available for this question!
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8) Which method is used for obtaining starting torque in a single phase induction motor?
a. Resistance split phase starting
b. Capacitor start capacitor run
c. Permanent split capacitor motor
d. Only a and c
e. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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9) Which type of rotor is used for single phase induction motor?
a. Wound rotor
b. Squirrel cage rotor
c. Both (A) & (B)
d. None of these
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Answer
Explanation
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ANSWER: Squirrel cage rotor
Explanation:
No explanation is available for this question!
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10) Which among these are the types of single phase AC motors?
i. Induction
ii. Shaded pole
iii. Synchronous
iv. Universal
a. i & ii only
b. ii, iii & iv only
c. i, ii, iii & iv
d. ii & iii only
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Answer
Explanation
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ANSWER: i, ii, iii & iv
Explanation:
No explanation is available for this question!
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