MDE 15 Q3

1 / 5

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

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

A) To determine if the piston has proper thermal conductivity

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

D) To assess the piston’s resistance to corrosion

2 / 5

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

B) Visually inspect for obvious surface damage

D) Check for proper alignment with the connecting rod

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

C) Measure the thickness of the piston material

3 / 5

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

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

A) To determine if the piston rings are functioning properly

C) To evaluate the piston’s lubrication quality

D) To measure the piston’s thermal expansion

4 / 5

During inspection, if the piston shows signs of excessive carbon build-up, what should be the next step?

C) Ignore the build-up if it’s not affecting performance

B) Use a chemical carbon remover to clean the piston

A) Sandblast the piston to remove the carbon

D) Replace the piston with a new one

5 / 5

What should be done if the piston’s ring grooves show excessive wear during inspection?

C) Replace the piston and rings together

A) Replace the piston rings only

B) Reface the piston to reduce wear

D) Clean the piston and reuse it

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