Question 96Motor Plants - 1st Asst/Chief
70% to passThe purpose of the interlocked three-way valve shown in the illustration is to _______________. Illustration MO-0058
Acontrol the rate of fuel oil flow to the engines
Bchange fuel from heavy to light oil or vice-versa while insuring that oil is returned to the proper day tank
Cact as an emergency fuel shut off, regardless of the fuel being used
Drecirculate fuel through the heater during warm-up
AI Explanation
The correct answer is B) change fuel from heavy to light oil or vice-versa while ensuring that oil is returned to the proper day tank. The purpose of the interlocked three-way valve is to allow the operator to switch between different types of fuel oil (heavy or light) while ensuring that the fuel is returned to the correct day tank. This prevents cross-contamination of the fuel and maintains the proper fuel supply for the engines. The other answer choices do not accurately describe the primary function of this type of valve in a marine fuel system.
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