Which of the following represents the average power consumed by a single-phase electric motor?
A.
KVA / PF
B.
kW x PF / 1,000
C.
KVA x PF
D.
amps / PF
The Answer Is:
C
This question includes an explanation.
Explanation:
For electrical systems, real power (kW) is obtained by multiplying apparent power (kVA) by the power factor (PF):
kW = kVA × PF
This formula gives the average power consumed by a single-phase motor.
C. KVA × PF (Correct): Standard power equation for real power.
A. KVA / PF: Incorrect; dividing by PF would increase kVA, not convert to kW.
B. kW × PF / 1,000: Incorrect; kW already accounts for PF, and the division by 1,000 is irrelevant here.
D. amps / PF: Incomplete and not dimensionally correct.
[References:, , CHFM Candidate Handbook – Maintenance and Operations domain (electrical fundamentals)., , NFPA 70: National Electrical Code (NEC) – Basic power calculation rules., , ASHE/CHFM study materials on motor loads and electrical systems., ________________________________________]
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