ASE T2 - Diesel Engines Engine Practice Questions

A diesel engine is vibrating excessively. What is the first thing you should check?

• AA. Fuel quality
• BB. Oil viscosity
• CC. Turbocharger
• DD. Engine mounts

During a diesel engine diagnosis, you discover low fuel pressure. What could be a cause?

• AA. Worn piston rings
• BB. Clogged fuel filter
• CC. Faulty ignition coil
• DD. Excessive oil pressure

An engine starts but won't run. What is the most likely issue?

• AA. Defective glow plugs
• BB. Leaking radiator
• CC. Dirty air filter
• DD. Loose exhaust pipe

If a diesel engine produces a black exhaust smoke, what does it suggest?

• AA. Coolant leaks
• BB. Low oil level
• CC. Excess fuel being burned
• DD. Oil burning

If a diesel engine is overheating, which component should you inspect first?

• AA. Radiator
• BB. Fuel lines
• CC. Oil cooler
• DD. Water pump

When performing a leak down test on a diesel engine, what is being evaluated?

• AA. Oil pressure
• BB. Piston ring sealing
• CC. Valve timing
• DD. Fuel injector efficiency

What is the role of an intercooler in a turbocharged diesel engine?

• AA. Increase ambient air
• BB. Boost fuel pressure
• CC. Lower intake air temperature
• DD. Reduce exhaust emissions