MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 1:

Which of the following is a common fault that can be found on a cylinder liner during inspection?

D) Camshaft wear

B) Cylinder liner scoring or scratches

A) Piston ring land wear

C) Connecting rod bending

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Question 5:
Which of the following safety equipment is recommended when removing a cylinder head from a four-stroke diesel engine?

D) Breathing apparatus

A) Ear protection

C) Safety goggles and a hard hat

B) Welding gloves

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Question 2:

Why is it necessary to lock the engine turning gear before removing a cylinder head?

C) To increase engine compression

B) To prevent the crankshaft from rotating

D) To drain the lubricating oil from the cylinder

A) To allow the crankshaft to move freely

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4. What should be done with the coolant before removing the cylinder head?

C) Top off the coolant to prevent air pockets.

B) Drain the coolant to prevent it from spilling into the cylinders.

A) Leave the coolant in place to protect the system.

D) Add an inhibitor to the coolant system.

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Question 3:

What should be checked if the inner diameter of the cylinder liner is found to be out of tolerance during calibration?

D) Ignore the deviation if it is minimal

A) Replace the cylinder liner immediately

B) Recheck the measurement for accuracy

C) Reface the liner to bring it within tolerance

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Question 4:

What is the purpose of removing the fuel injectors before removing a cylinder head on a four-stroke diesel engine?

B) To allow easy rotation of the crankshaft

D) To remove all lubricating oil from the cylinder head

C) To relieve pressure within the combustion chamber

A) To increase the engine’s compression

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Question 6:

If a cylinder liner is found to be out of specification after calibration, what is a typical corrective action?

B) Reinstall the liner without further changes

D) Ignore the issue if performance is not affected

C) Refurbish or replace the liner

A) Adjust the engine’s operating parameters

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Question 1:

What is the first step to take when preparing to remove a four-stroke diesel engine cylinder head?

B) Lock the engine turning gear

C) Disconnect the cooling system

D) Release stored energy, including air and hydraulic pressures

A) Remove the fuel injectors

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Question 4:

During inspection, if the piston shows signs of excessive carbon build-up, what should be the next step?

B) Use a chemical carbon remover to clean the piston

C) Ignore the build-up if it’s not affecting performance

A) Sandblast the piston to remove the carbon

D) Replace the piston with a new one

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Question 2:

During the initial startup of an engine with a new liner, what is important to check frequently?

A) Fuel consumption

B) Engine temperature

D) Oil pressure and temperature

C) Exhaust smoke color

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3. Which safety precaution is most critical when handling the cylinder head removal?

A) Use a torque wrench for all bolts.

B) Wear appropriate personal protective equipment (PPE).

D) Check the fuel quality before proceeding.

C) Ensure the engine is in gear.

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Question 5:

After replacing the bottom end bearings, what is a key step before starting the engine?

C) Replacing the air filter

D) Checking the fuel system for leaks

B) Reinstalling the exhaust system

A) Refilling the engine oil and coolant

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