Question 88Motor Plants - QMED

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.