MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 2:

Which of the following components is typically included in a diesel engine hydraulic oil start system?

C) Air compressor

A) Hydraulic pump

B) Fuel filter

D) Turbocharger

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Question 2:
Which of the following is a key maintenance task for the air motor to prevent corrosion and ensure long-term reliability?

D) Adjusting the valve clearances

B) Cleaning the fuel injectors

A) Lubricating the air motor components regularly

C) Replacing the air intake filter

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Question 1:
At what approximate crank angle does the air start valve typically begin to open on a four-stroke diesel engine during the starting process?

A) 0° (TDC)

C) 270° after TDC

B) 90° after TDC

D) 360° (BDC)

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Question 3:
In an air starting system, the interlock system is designed to:

D) Monitor the lube oil temperature during engine start-up

B) Maintain constant air pressure in the starting air system

A) Ensure that the engine cannot be started unless the turning gear is disengaged

C) Regulate the amount of fuel injected during startup

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Question 6:

In a hydraulic oil start system, what is the purpose of the hydraulic control valve?

C) To monitor the temperature of the hydraulic oil

B) To filter impurities from the hydraulic fluid

A) To regulate the flow of hydraulic fluid to the starting motor

D) To provide additional cooling to the hydraulic system

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Question 3: During an attempt to start a large marine diesel engine, you find that no air is being delivered to the cylinders. What could be a likely cause?

A. Faulty fuel pump.

C. Closed starting air supply valve.

D. Low cylinder compression.

B. Exhaust valve stuck in the open position.

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Question 4: What should be inspected if there is air leakage during the start sequence of a marine diesel engine?

B. Starting air valve condition.

A. Fuel injection timing.

C. Piston ring clearance.

D. Turbocharger speed.

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Question 1:

What is the primary function of the hydraulic oil start system in a diesel engine?

D) To enhance the lubrication of engine components

B) To provide additional cooling to the engine

C) To initiate the engine’s start-up by engaging the starting mechanism

A) To assist with fuel injection timing

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Question 6:

Which component prevents the starter motor from operating when the engine is already running?

C) Neutral safety switch

A) Starter relay

D) Starter inhibitor switch

B) Ignition switch

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Question 2: If an engine does not start when initiating the start sequence, and the air start lever is in the correct position, what should be the next step?

A. Check for leaks in the starting air system.

D. Check the engine cooling water temperature.

C. Verify the correct positioning of the camshaft.

B. Inspect the turbocharger for blockages.

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Question 3:

How is the solenoid activated in a solenoid-operated starting system?

A) By a mechanical switch

C) By a push-button on the dashboard

D) By a current flowing through its coil

B) By an electronic control unit (ECU)

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Question 3:
Why is it important to inspect the condition of the air motor’s drive gear during routine maintenance?

D) To confirm the air pressure is within the specified range

C) To verify the air motor's air intake is clear

B) To ensure the gear is properly aligned with the engine's flywheel

A) To check for signs of overheating

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