MDE 15 End of Unit Quiz

MDE 15 End Of Unit Quiz

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Question 7:

What is a potential fault to look for on a piston during inspection that may affect engine compression?

B) Worn piston rings or ring lands

C) Bent push rods

A) Cracked cylinder head

D) Faulty fuel injectors

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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

A) Piston skirts

B) Crankshaft journals

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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?

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

C) Ignore the debris if it is not excessive

D) Immediately replace the entire engine

A) Continue with the bearing replacement and monitor performance

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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 2:

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

C) Bent push rods

D) Damaged valve seats

A) Crankshaft endplay

B) Worn piston rings

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5. Why is it important to mark the location of each cylinder head bolt during removal?

A) To ensure they are reinstalled in the correct sequence.

B) To prevent mixing up the bolts during reassembly.

D) To facilitate easier torqueing during reinstallation.

C) To check for wear patterns.

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1. Which of the following is the first step in preparing to remove a diesel engine cylinder head?

A) Loosen the cylinder head bolts in any order.

B) Disconnect the fuel lines and electrical connections.

D) Secure all necessary permits and ensure the engine is properly isolated.

C) Ensure the engine is at operating temperature.

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Question 7:

What should be examined on the piston pins during inspection?

B) Wear and clearance

A) Length and thickness

C) Surface color and finish

D) Thread condition

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Question 4:

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

A) Incorrect valve timing

B) Insufficient oil supply

C) Worn cylinder liner

D) Faulty ignition system

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Question 5:

What is a common method to check for warping or distortion in a cylinder liner during calibration?

B) Use a dial gauge to measure any deviations from the cylindrical shape

A) Measure the liner’s length in different orientations

C) Inspect visually for color changes

D) Measure the hardness of the liner material

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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

C) Exhaust smoke color

D) Oil pressure and temperature

B) Engine temperature

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Question 1:

What is the first precaution to take before starting an engine for the first time after maintenance?

A) Check the fuel level

B) Verify all bolts and fasteners are properly tightened

C) Test the exhaust system

D) Ensure the engine is at operating temperature

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