Question 88Motor Plants - QMED70% to pass
What type of propeller thrust reversing method (or methods) is or are used with a main propulsion slow-speed crosshead type diesel engine installation?
AI Explanation
The correct answer is C: Either a reversible engine driving a fixed-pitch propeller or a non-reversible engine driving a controllable-pitch propeller could be used.
This is correct because with a slow-speed crosshead type diesel engine, both a reversible engine driving a fixed-pitch propeller or a non-reversible engine driving a controllable-pitch propeller are viable options for providing thrust reversal. The reversible engine can change the direction of rotation to provide astern thrust, while the controllable-pitch propeller can also be adjusted to provide astern thrust even with a non-reversible engine.
The other options are incorrect because a non-reversing engine with a fixed-pitch propeller (option A) would not be able to provide astern thrust, and a reversing engine with a controllable-pitch propeller (option B) is an unnecessary and uncommon configuration for this type of installation.
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