MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 6:

What could be a mechanical cause of unstable engine speed, and how can it be fixed?

D) Loose electrical connections; tighten connections

A) Worn camshaft; replace the camshaft

B) Faulty thermostat; replace the thermostat

C) Low fuel pressure; adjust the fuel pressure regulator

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Question:
Which of the following is an effective remedy for insufficient air supply in marine diesel engines?

A. Clean or replace the air filters

D. Adjust the fuel injection timing

B. Increase the fuel injection pressure

C. Reduce the engine load

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Question 4:

How can issues with the fuel supply system lead to unstable engine speed, and what is the appropriate remedy?

C) Faulty starter motor; replace starter

A) Fuel contamination; replace the fuel filter

D) Broken engine mounts; repair mounts

B) Low engine oil pressure; add oil

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Question 1:

What is a common cause of diesel engine overheating related to the cooling system?

A) Faulty fuel injectors

B) Low oil pressure

C) Clogged radiator or coolant passages

D) Excessive exhaust back pressure

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Question 4:

How can a malfunctioning water pump lead to overheating, and what is the recommended solution?

D) It can cause excessive exhaust temperature; adjust the timing

B) It can restrict coolant flow; replace the water pump

C) It can increase oil temperature; replace the oil filter

A) It can cause coolant to leak; replace the water pump

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Question 2:

Which of the following is a remedy for low lubricating oil pressure due to worn engine bearings?

D) Add more oil

A) Replace the oil filter

C) Rebuild or replace the engine bearings

B) Clean the oil cooler

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Question 7:

How can a leaking oil line or gasket contribute to low lubricating oil pressure, and what is the appropriate solution?

D) It raises oil temperature; improve cooling

C) It contaminates the oil; replace the oil filter

A) It allows oil to escape; repair or replace the damaged line or gasket

B) It increases oil viscosity; change the oil

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Question 5:

If low lubricating oil pressure is caused by excessive oil viscosity, what is the recommended action?

A) Replace the oil pump

C) Adjust the oil pressure relief valve

D) Clean the oil passages

B) Change the oil to a lower viscosity grade

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Question 1: Which of the following is a potential cause of high bearing temperatures in a diesel engine?

C) Low ambient temperature

A) Excessive lubricating oil flow

D) Oversized bearing clearance

B) Improper alignment of the bearing

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Question 4:

What should be checked if low lubricating oil pressure is suspected due to oil level issues?

B) Oil level in the engine

C) Oil pump operation

A) Oil temperature

D) Oil filter condition

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Question 6:

What could be a consequence of a blocked or restricted air intake on engine temperature, and how can it be fixed?

C) It can cause reduced power; adjust the fuel injection

A) It can cause overheating; clean or replace the air filter

B) It can cause oil contamination; change the oil

D) It can cause exhaust leaks; check and repair exhaust system

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Question 1:
What is a potential cause of abnormal turbocharger vibration at a steady speed in a diesel engine?

A) Inadequate fuel injection timing

B) Loose or damaged turbine blades

D) Blocked air intake filter

C) Excessive lubricating oil pressure

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