Question 192Motor Plants - Assistant Engineer
70% to passIn addition to the main starting air compressor, another air compressor, driven by a separate power source, is installed to _______________.
Aprovide air for engine scavenging
Bprovide air for engine supercharging
Csupply a backup source of starting air
Dsupply the independent source of reversing air
AI Explanation
The correct answer is C) supply a backup source of starting air. The main air compressor on a vessel is responsible for providing the primary source of starting air for the main engines. However, as a safety precaution, maritime regulations require that a secondary or backup air compressor, driven by a separate power source, be installed. This backup air compressor is intended to supply a reserve source of starting air in case the main air compressor fails or is unavailable for any reason. The other answer choices do not accurately describe the purpose of this secondary air compressor system.
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