MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 1:

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

D) Release stored energy, including air and hydraulic pressures

B) Lock the engine turning gear

C) Disconnect the cooling system

A) Remove the fuel injectors

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Question 6:

What is a common procedure to check the piston for proper fit in the cylinder liner?

D) Measure the piston crown temperature

B) Check piston for free play in the liner

C) Inspect the piston for carbon deposits

A) Measure piston ring gap

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Question 5:

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

A) Refilling the engine oil and coolant

B) Reinstalling the exhaust system

C) Replacing the air filter

D) Checking the fuel system for leaks

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Question 3:

What should be checked regarding the cooling system before an initial engine startup?

D) Check the battery charge

C) Test the fuel injectors

B) Verify the exhaust system is clear

A) Ensure the coolant is at the correct level

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Question 4:

Which calibration technique is used to measure the wall thickness of a cylinder liner?

B) Using a dial gauge to check for ovality

C) Using a bore gauge to measure the internal diameter

A) Using a micrometer to measure the outer and inner diameters

D) Using a caliper to measure the total length of the liner

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Question 2:

Why is it important to ensure that the engine has adequate oil pressure before starting it for the first time?

D) To improve fuel efficiency

A) To ensure proper cooling

C) To protect the engine from damage

B) To prevent engine overheat

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

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

C) Top off the coolant to prevent air pockets.

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

D) Add an inhibitor to the coolant system.

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Question 4:

During piston inspection, what fault might be indicated by scoring on the piston skirts?

D) Faulty ignition system

C) Worn cylinder liner

B) Insufficient oil supply

A) Incorrect valve timing

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Question 5:

Before starting an engine for the first time after maintenance, why is it important to check the oil level and quality?

D) To increase engine power

C) To improve fuel consumption

B) To ensure proper lubrication and performance

A) To reduce engine noise

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Question 7:

What is a common tool used to measure the clearance between the new bottom end bearings and the crankshaft?

A) Micrometer

D) Dial indicator

C) Feeler gauge

B) Torque wrench

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Question 1:

When inspecting a removed diesel engine piston, what is the primary purpose of checking the piston for scoring or scratches?

A) To determine if the piston rings are functioning properly

D) To measure the piston’s thermal expansion

C) To evaluate the piston’s lubrication quality

B) To assess if the piston has been damaged by foreign objects

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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?

A) Ear protection

B) Welding gloves

C) Safety goggles and a hard hat

D) Breathing apparatus

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