Engineering · Electrical — Theory
A low power factor on an AC system is generally undesirable because it:
- AReduces the current for a given real load
- BIncreases the current and losses for a given real power, reducing usable capacity✓ Correct
- CRaises the system frequency
- DImproves voltage regulation
Explanation
A low (lagging) power factor means more current is needed to deliver the same real power, increasing I²R losses and voltage drop and reducing the effective capacity of generators and cables.
Authority: Marine Electrical (USCG engineering topic)
Practice the full Engineering bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Engineering questions
- Electrical — Theory
Ohm's law states that the current in a circuit is:
- Electrical — Theory
Electrical power in a DC circuit is calculated as:
- Diesel — Operating Cycle
In a four-stroke-cycle diesel engine, the events occur in which order?
- Diesel — Operating Cycle
Compared with a four-stroke engine of the same speed and cylinder size, a two-stroke-cycle diesel produces a power stroke:
- Diesel — Air Systems
The primary purpose of scavenging in a two-stroke diesel engine is to:
- Diesel — Air Systems
A turbocharger increases engine power output mainly by: