MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 6:

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

B) To filter impurities from the hydraulic fluid

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

C) To monitor the temperature of the hydraulic oil

D) To provide additional cooling to the hydraulic system

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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

D) Starting motor relay

C) Engine temperature sensor

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

A) It stores excess hydraulic fluid for future use

D) It filters impurities from the hydraulic oil

B) It regulates the fuel supply to the engine

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

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

A) Prevent starting if the oil temperature is too high

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

C) Ensure the fuel pumps are correctly aligned

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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

A) The battery is disconnected from the starter motor

D) The fuel pump is deactivated

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

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

A) Reduced engine starting speed

B) Increased air pressure in the system

D) Oil leaks around the air motor housing

C) Unusual noise from the air motor

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Question 1:
Which of the following is a safety device commonly fitted to the air starting system of a large medium-speed marine diesel engine?

C) Fuel oil purifier

B) Exhaust gas temperature sensor

D) Governor actuator

A) Pressure relief valve

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Question 1:
What is the primary purpose of regularly checking the air pressure in the air motor starting system?

D) To avoid excessive wear on the engine's crankshaft

C) To prevent the air motor from overheating

B) To maintain the correct fuel-air mixture

A) To ensure the air motor operates at the correct speed

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Question 3:
How does the timing of the air start valve's opening relate to the inlet and exhaust valves' operation in a four-stroke diesel engine?

A) The air start valve opens when both inlet and exhaust valves are closed

B) The air start valve opens when the inlet valve is open and the exhaust valve is closed

C) The air start valve opens when both the inlet and exhaust valves are open

D) The air start valve opens when the inlet valve is closed and the exhaust valve is open

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Question 2:

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

A) Alternator

D) Voltage regulator

B) Starter motor

C) Battery

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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?

D) 360° (BDC)

B) 90° after TDC

A) 0° (TDC)

C) 270° after TDC

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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?

A) Crankcase explosion relief valve interlock

D) Cooling water pressure interlock

C) Exhaust valve interlock

B) Crankcase door interlock

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