Question 211Electricity & Electronics - Assistant Engineer

70% to pass

The shaft revolution indicator system for a fixed-pitch propeller has which of the following display capabilities?

AShaft RPM and cumulative shaft revolutions only
BDirection of rotation, shaft RPM, and cumulative shaft revolutions
CDirection of rotation and shaft RPM only
DPropeller pitch, shaft RPM, and cumulative shaft revolutions
AI Explanation

The correct answer is B) Direction of rotation, shaft RPM, and cumulative shaft revolutions. The shaft revolution indicator system for a fixed-pitch propeller is required to display the direction of rotation, shaft RPM, and cumulative shaft revolutions. This is specified in the regulations governing the design and installation of these systems on vessels. The other options are incorrect because they do not include all the required display capabilities. Option A is missing the direction of rotation, option C is missing the cumulative shaft revolutions, and option D includes propeller pitch, which is not a standard display for a fixed-pitch propeller system.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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