MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 7:

What should be examined on the piston pins during inspection?

D) Thread condition

B) Wear and clearance

A) Length and thickness

C) Surface color and finish

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Question 4:

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

C) Using a bore gauge to measure the internal diameter

B) Using a dial gauge to check for ovality

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 3:

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

B) Recheck the measurement for accuracy

A) Replace the cylinder liner immediately

D) Ignore the deviation if it is minimal

C) Reface the liner to bring it within tolerance

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Question 2:

What is a common sign of piston ring wear that can be observed during inspection?

C) Scoring on the piston surface

D) Loose connecting rod bolts

B) Excessive oil consumption

A) Cracking in the cylinder liner

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

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

C) Top off the coolant to prevent air pockets.

D) Add an inhibitor to the coolant system.

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

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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

D) Check the battery charge

C) Test the fuel injectors

B) Verify the exhaust system is clear

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Question 6:

What should be done if there is a significant amount of debris or metal particles found in the oil pan during the bearing replacement process?

D) Immediately replace the entire engine

B) Clean the debris from the oil pan and replace the oil filter

C) Ignore the debris if it is not excessive

A) Continue with the bearing replacement and monitor performance

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Question 1:
Which of the following is the first safety precaution to take before removing a four-stroke diesel engine cylinder head?

B) Ensure the engine is at operating temperature

D) Remove all cooling water from the system

A) Disconnect the fuel supply

C) Release all stored energy, including air and hydraulic pressures

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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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Question 7:

What should be done if the engine does not start or exhibits abnormal behavior during the initial startup?

D) Add more fuel

B) Shut down the engine and perform a thorough check

A) Continue to try starting the engine

C) Increase the throttle

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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?

C) To relieve pressure within the combustion chamber

D) To remove all lubricating oil from the cylinder head

A) To increase the engine’s compression

B) To allow easy rotation of the crankshaft

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Question 1:

What is the primary precaution to take during the initial startup of an engine with a new cylinder liner to ensure proper seating?

B) Apply high pressure to the cylinder liner

A) Increase the engine speed gradually

D) Operate the engine at a lower temperature than normal

C) Ensure the engine runs at maximum load

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