ASE T1 - Gasoline Engines Engine Practice Questions

After replacing a spark plug, the engine misfires. What is the most likely cause?

• AA. Dirty fuel injectors
• BB. Incorrect gap
• CC. Low compression
• DD. Faulty ignition coil

During a test drive, the engine overheats. What could be a potential cause?

• AA. Faulty starter
• BB. Bad ignition timing
• CC. Clogged air filter
• DD. Low coolant level

An engine has a rough idle. Which component should be inspected first?

• AA. Fuel pump
• BB. Timing belt
• CC. Idle control valve
• DD. Exhaust system

The engine light is on, and the car is not accelerating properly. What could be the issue?

• AA. Bad catalytic converter
• BB. Clogged air filter
• CC. Broken exhaust pipe
• DD. Low tire pressure

A technician hears a knocking noise from the engine. What should they check first?

• AA. Battery voltage
• BB. Brake fluid level
• CC. Transmission fluid
• DD. Oil level and condition

After a recent tune-up, the engine is consuming more oil than usual. What might be wrong?

• AA. Improper gap settings
• BB. Bad fuel injector
• CC. Clogged air filter
• DD. Worn piston rings

What tool is essential for checking engine compression?

• AA. Multimeter
• BB. Compression gauge
• CC. Timing light
• DD. Torque wrench

What can cause a rough running engine?

• AA. Clean air filter
• BB. Tight gas cap
• CC. Strong battery
• DD. Dirty fuel injectors