USCG USCG General Eng
Set 10 • Question #33 of 498
Launch Interactive Practice Room Which of the following statements is true concerning the overall efficiency of air compressors?
A
High pressure compressors are more efficient than low pressure compressors.
B
Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit.
C
Two stage compressors are generally more efficient than single stage compressors.
✓ Correct Answer
D
The volumetric efficiency is decreased in multistage compressors.
USCG NMC Regulatory Explanation
In USCG Marine Engineering General Subjects, for engine room systems involving 'Which of the following statements is true concerning the overall efficiency of air compressors', the standard operating requirement is: 'Two stage compressors are generally more efficient than single stage compressors.'.
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