MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 3:
Which interlock prevents a medium-speed diesel engine from being started if the engine's crankcase doors are open?

C) Exhaust valve interlock

A) Crankcase explosion relief valve interlock

D) Cooling water pressure interlock

B) Crankcase door interlock

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

C) Unusual noise from the air motor

B) Increased air pressure in the system

D) Oil leaks around the air motor housing

A) Reduced engine starting speed

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Question 2:

Which component of the electric starting system provides the electrical power needed to turn the starter motor?

D) Voltage regulator

B) Starter motor

A) Alternator

C) Battery

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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?

D. Check the engine cooling water temperature.

A. Check for leaks in the starting air system.

C. Verify the correct positioning of the camshaft.

B. Inspect the turbocharger for blockages.

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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?

A. Air start valve stuck in the open position.

C. Low engine coolant level.

D. Excessive crankcase pressure.

B. Incorrect fuel injection timing.

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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

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

B) To filter impurities from the hydraulic fluid

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Question 5:

Which safety interlock prevents the hydraulic oil start system from operating if certain conditions are not met?

B) Battery voltage sensor

C) Engine temperature sensor

D) Starting motor relay

A) Hydraulic pressure switch

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Question 4:

What role does the hydraulic accumulator play in the hydraulic oil start system of a diesel engine?

C) It maintains hydraulic pressure for starting the engine

D) It filters impurities from the hydraulic oil

B) It regulates the fuel supply to the engine

A) It stores excess hydraulic fluid for future use

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Question 5:

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

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

C) The alternator charges the battery

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Question 3:

Which interlock is commonly found in a diesel engine hydraulic oil start system to ensure safe operation?

A) Engine oil pressure switch

B) Hydraulic fluid level sensor

D) Fuel pressure regulator

C) Coolant temperature gauge

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Question 4:

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

C) To crank the engine and initiate combustion

D) To regulate the engine’s fuel injection

A) To generate electrical power for the ignition system

B) To provide cooling to the engine

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Question 2:
What is the function of the starting air interlock in a direct air start medium-speed diesel engine?

C) To prevent starting if the main starting air valve is not fully open

D) To ensure that the crankcase doors are properly secured

A) To prevent the engine from starting if the cooling water temperature is too low

B) To ensure that the fuel valves are in the open position

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