MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 3:

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

A) Ensure the coolant is at the correct level

B) Verify the exhaust system is clear

C) Test the fuel injectors

D) Check the battery charge

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Question 3:

If a cylinder liner shows signs of excessive taper, what does this indicate?

C) Uneven wear due to poor lubrication

B) Overheating issues

D) Faulty turbocharger

A) Normal wear

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Question 5:

During the inspection of the piston, what should be checked for proper condition?

C) Valve seats

D) Flywheel condition

B) Crankshaft journals

A) Piston skirts

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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 6:

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

B) Deposits of carbon on the piston crown

A) Corrosion on the exterior of the liner

C) Darkened oil with a milky appearance

D) Cracked piston rings

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Question 5:

What is the significance of checking the piston for signs of piston ring land deformation during inspection?

D) To assess the piston’s resistance to corrosion

A) To determine if the piston has proper thermal conductivity

B) To verify the piston’s ability to maintain proper compression

C) To check if the piston is aligned correctly with the crankshaft

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Question 2:

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

B) To prevent the crankshaft from rotating

A) To allow the crankshaft to move freely

C) To increase engine compression

D) To drain the lubricating oil from the cylinder

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Question 6:

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

B) Check piston for free play in the liner

D) Measure the piston crown temperature

A) Measure piston ring gap

C) Inspect the piston for carbon deposits

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Question 2:
Why is it essential to relieve the cylinder pressure before removing the cylinder head of a four-stroke diesel engine?

C) To maintain the integrity of the gaskets

B) To avoid accidental ejection of the head

A) To prevent fuel contamination

D) To ensure accurate reassembly

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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

A) Piston rings

B) Cylinder liner surface

C) Piston pins

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Question 4:
Before removing a cylinder head on a four-stroke diesel engine, why should the cooling system be drained?

D) To lower the engine’s temperature

C) To avoid leakage into the combustion chamber

B) To ensure the cooling system is clean

A) To prevent coolant contamination

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Question 6:

What should be checked and adjusted if necessary during the initial startup of an engine with a new liner?

D) Exhaust system alignment

A) Air filter condition

B) Fuel injection timing

C) Radiator coolant level

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