MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 3:

Which type of lubrication is critical to verify before starting an engine with a new cylinder liner?

A) Coolant system lubrication

C) Engine oil lubrication

D) Transmission oil lubrication

B) Hydraulic system lubrication

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

D) Add an inhibitor to the coolant system.

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

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

C) Top off the coolant to prevent air pockets.

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Question 3:

How should the piston’s skirt be inspected to check for ovality or distortion?

A) Use a micrometer to measure the diameter at various points

C) Measure the thickness of the piston material

D) Check for proper alignment with the connecting rod

B) Visually inspect for obvious surface damage

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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?

C) Feeler gauge

D) Dial indicator

A) Micrometer

B) Torque wrench

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Question 1:

When inspecting a cylinder liner after removing the piston, which of the following should be checked for wear or damage?

D) Crankshaft bearings

B) Cylinder liner surface

C) Piston pins

A) Piston rings

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Question 2:

Which component must be removed to access the bottom end bearings of a diesel engine?

D) The camshaft

A) The oil pan

B) The cylinder head

C) The intake manifold

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Question 5:

What should be done immediately after unbolting the cylinder head on a four-stroke diesel engine?

A) Tap the cylinder head lightly to break the seal

C) Inspect the piston and liner

D) Apply new sealing compound

B) Remove the valve cover

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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?

A) Replace the cylinder liner immediately

D) Ignore the deviation if it is minimal

C) Reface the liner to bring it within tolerance

B) Recheck the measurement for accuracy

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Question 6:

What fault might be detected in a cylinder liner that suggests coolant leakage?

A) Corrosion on the exterior of the liner

D) Cracked piston rings

B) Deposits of carbon on the piston crown

C) Darkened oil with a milky appearance

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Question 2:

What is a typical fault observed on a piston that might indicate engine problems?

C) Bent push rods

A) Crankshaft endplay

D) Damaged valve seats

B) Worn piston rings

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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?

B) To prevent engine overheat

C) To protect the engine from damage

D) To improve fuel efficiency

A) To ensure proper cooling

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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

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

C) To evaluate the piston’s lubrication quality

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