Question 590General Subjects - Assistant Engineer

70% to pass

Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the evaporator? Illustration MP-CW-06

Diagram for USCG General Subjects Assistant: Referring to the illustrated motor ship fresh water cooling system drawing,...

AThe evaporator uses heat recovered from the main engine cooling water as a heat source to generate fresh water and is piped in series with and after the jacket water cooler.

BThe evaporator uses heat recovered from the jacket water cooler sea water as a heat source to generate fresh water and is piped in series with and prior to the jacket water cooler.

CThe evaporator uses heat recovered from the main engine cooling water as a heat source to generate fresh water and is piped in series with and prior to the jacket water cooler.

DThe evaporator uses heat recovered from the main engine cooling water as a heat source to generate fresh water and is piped in parallel with the jacket water cooler.

AI Explanation

The correct answer is C. The evaporator uses heat recovered from the main engine cooling water as a heat source to generate fresh water, and it is piped in series with and prior to the jacket water cooler. This is the typical configuration for a motor ship fresh water cooling system, where the engine cooling water provides the heat source for the evaporator to produce fresh water, which is then used in the cooling system. The other answer choices are incorrect because: A) the evaporator is not piped in series after the jacket water cooler, B) the evaporator does not use heat from the jacket water cooler, and D) the evaporator is not piped in parallel with the jacket water cooler.

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App