MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 5:
During a routine check, what should be done if moisture is found in the air motor's air supply line?

C) Increase the air pressure to blow out the moisture

B) Drain the moisture and inspect the air dryer or moisture separator

A) Replace the entire air supply line

D) Lubricate the air motor components more frequently

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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

D) To provide additional cooling to the hydraulic system

B) To filter impurities from the hydraulic fluid

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

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Question 5: Which of the following could cause a failure to start in a large marine diesel engine due to an issue with the air starting system?

B. Incorrect fuel injection timing.

D. Excessive crankcase pressure.

A. Air start valve stuck in the open position.

C. Low engine coolant level.

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Question 2:

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

D) Turbocharger

B) Fuel filter

A) Hydraulic pump

C) Air compressor

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Question 2:
During which stroke of a four-stroke diesel engine cycle is the air start valve usually open?

D) Exhaust stroke

B) Compression stroke

C) Power stroke

A) Intake stroke

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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?

C. Verify the correct positioning of the camshaft.

B. Inspect the turbocharger for blockages.

D. Check the engine cooling water temperature.

A. Check for leaks in the starting air system.

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Question 4:
The low lube oil pressure interlock in a direct air start medium-speed diesel engine is designed to:

D) Ensure that the governor is set to the correct speed

A) Prevent starting if the oil temperature is too high

C) Ensure the fuel pumps are correctly aligned

B) Prevent starting if lube oil pressure is below a safe threshold

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Question 4:
What is a common sign that the air motor’s exhaust port needs to be inspected or cleaned?

B) Increased air pressure in the system

A) Reduced engine starting speed

D) Oil leaks around the air motor housing

C) Unusual noise from the air motor

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Question 5:

What happens when the starter switch is turned on in a solenoid-operated starting system?

C) The alternator charges the battery

B) The solenoid engages the starter motor and the engine cranks

D) The fuel pump is deactivated

A) The battery is disconnected from the starter motor

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Question 4:

Which of the following describes the role of the starter motor in the electric starting system?

B) To provide cooling to the engine

A) To generate electrical power for the ignition system

C) To crank the engine and initiate combustion

D) To regulate the engine’s fuel injection

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Question 2:
What is the primary function of the non-return valve in the air starting system of a medium-speed marine diesel engine?

C) To measure exhaust gas temperature

D) To control the flow of cooling water

A) To prevent backflow of air into the receiver

B) To regulate the fuel injection timing

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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

A) To check for signs of overheating

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

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

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