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WorksheetsChapter 2 DIAGNOSIS AND SERVICE OF ENGINE SYSTEM
Total questions: 20
Worksheet time: 7mins
Low oil pressure is observed in an engine. Which is the MOST probable cause?
Overfilled engine oil
Clogged oil filter
New piston rings installed
Clean oil pan
What is one consequence of low oil pressure in an engine lubrication system?
Reduced engine speed
Increased engine wear
Improved engine seal
Enhanced oil viscosity
What serious issue can occur if the cooling system or any part of it fails?
Reduced fuel efficiency
Engine overheating
Improved engine performance
Increased oil pressure
What does the process of "bleeding the cooling system" involve?
Locating and repairing radiator leaks
Testing the drive belt
Removing air from the cooling system
Cleaning the cooling system
What is the purpose of chemical cleaning in a fuel system maintenance?
To increase fuel efficiency
To remove deposits settled in the fuel system
To replace worn components
To adjust fuel injectors
Why is it important to replace components like the fuel pump, fuel filter, or fuel injectors during fuel system maintenance?
To increase exhaust emissions
To enhance engine noise
To prevent deposits in the fuel system
To improve fuel efficiency
What is a potential problem associated with a malfunctioning mechanical fuel pump?
Excessive fuel consumption
Lack of engine power
Insufficient fuel delivery
Slow engine warm-up
What could be a sign of a defective accelerator pump system during a quick inspection of the carburetor?
Slow engine warm-up
Lack of engine power during acceleration
Dripping oil from the main nozzle
No discharge of fuel into the primary barrel
What role does the Engine Control Unit (ECU) play in an EFI vehicle?
Controls the injection of fuel and spark timing
Monitors tire pressure
Regulates air conditioning
Manages the radio system
How are ECU fault codes typically retrieved from a vehicle?
By checking the oil level
Using a diagnostic scan tool
Observing the exhaust color
Disconnecting the battery
What is a common problem associated with superchargers?
Low boost level
Excessive cleanliness
Minimal noise
Turbocharger failure
What does a clogged air filter typically affect in a vehicle?
Oil pressure
Brake efficiency
Fuel consumption
Transmission performance
Which tool is used to measure actual oil pressure during diagnosis?
Digital tachometer
Oil pressure gauge
Feeler gauge
Vacuum pump
What is the correct safety step before removing a radiator cap?
Increase engine RPM
Remove cap when engine is hot
Allow engine to cool
Close the exhaust valve
When cleaning a fuel tank, which item MUST be done first?
Remove the spark plugs
Fill tank with water
Add cleaning solvent
Disconnect the fuel pump
Whining noise from a turbocharger usually indicates:
Air filter is clean
Boost pressure is normal
Damaged bearings
Good lubrication
Low boost level in a supercharger is often caused by:
Overinflated tires
Tight radiator cap
Strong battery current
Loose or slipping belt
Oil leaking from a supercharger is MOST likely due to:
Rich mixture
Worn seals
High fuel pressure
Thick coolant
Slow engine warm-up is commonly caused by:
Stuck-open thermostat
Dirty air filter
Low engine oil
Worn spark plugs
Which step is required when cleaning fuel injectors?
Remove cylinder head
se pressurized chemical cleaning
Drain transmission oil
Replace timing belt
