1) The electric power from primary distribution line is delivered to distribution substations by using
a. 1 phase wire
b. 3 phase, 3 wire
c. 3 phase, 4 wire
d. All of these
e. None of these
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Answer
Explanation
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ANSWER: 3 phase, 4 wire
Explanation:
No explanation is available for this question!
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2) The secondary distribution transformer is generally
a. Star connected
b. Star connected with the secondary delta connected
c. Delta connected with the secondary star connected
d. Delta connected
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Answer
Explanation
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ANSWER: Delta connected with the secondary star connected
Explanation:
No explanation is available for this question!
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3) The conversion factor for the standard power rating motor is equal to
a. 0.735
b. 0.746
c. 0.748
d. 0.756
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Answer
Explanation
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ANSWER: 0.746
Explanation:
No explanation is available for this question!
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4) The ratio of average load over a designated period to the peak load demand occurring in that period is known as
a. power factor
b. ratchet rate
c. load factor
d. production factor
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Answer
Explanation
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ANSWER: load factor
Explanation:
No explanation is available for this question!
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5) The production factor is defined as the ratio of
a. current year production to the reference year production
b. current year production to the reference month production
c. reference month production to the current month production
d. reference year production to the current year production
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Answer
Explanation
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ANSWER: current year production to the reference year production
Explanation:
No explanation is available for this question!
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6) The reactive power component kVAR is equal to the
a. kVA sin∅
b. kW tan∅
c. kW cos∅
d. Both (a) and (b)
e. None of these
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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7) The current flowing through the resistance is given by
a. I cos∅
b. I sin∅
c. I tan∅
d. I cot∅
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Answer
Explanation
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ANSWER: I cos∅
Explanation:
No explanation is available for this question!
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8) Reactive power is measured in terms of
a. kW
b. kVA
c. kVAR
d. None of these
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Answer
Explanation
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ANSWER: kVAR
Explanation:
No explanation is available for this question!
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9) Power factor is the ratio of
a. Active power to the reactive power
b. Active power to the apparent power
c. Apparent power to the active power
d. Reactive power to the apparent power
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Answer
Explanation
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ANSWER: Active power to the apparent power
Explanation:
No explanation is available for this question!
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10) For a typical AC power supply, the secondary transmission carries the voltage of
a. 11kV
b. 33 kV
c. 66 kV
d. 132 kV
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Answer
Explanation
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ANSWER: 33 kV
Explanation:
No explanation is available for this question!
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