City & Guilds 7290-157 Quiz Questions

What is the function of the camshaft in a combustion engine?

• Controls the timing of fuel injection

• Opens and closes engine valves

• Maintains oil pressure

• Drives the alternator

What could be the cause of low compression in a cylinder?

• Clogged air filter

• Worn piston rings

• Faulty fuel injector

• Over-tightened spark plug

What is the purpose of a cylinder head gasket?

• To allow heat to escape

• To seal the combustion chamber

• To control valve timing

• To regulate fuel pressure

Which of the following is a symptom of a failing fuel injector?

• Engine overheating

• Poor acceleration

• Low oil pressure

• Grinding noise

What is the main function of the engine's crankshaft?

• Control fuel mixture

• Convert reciprocating motion

• Distribute power to the wheels

• Regulate coolant flow

A high-pitched squealing noise from the engine may indicate:

• Low coolant level

• A worn serpentine belt

The purpose of the oil pump is to:

• Maintain engine compression

• Circulate oil

• Regulate engine temperature

• Inject fuel into cylinders

What could cause a car engine to overheat?

• Low tire pressure

• Faulty thermostat

• Worn-out spark plugs

• Dirty air filter

What does an oxygen (O2) sensor measure?

• Engine temperature

• Air-to-fuel ratio in exhaust gases

• Coolant pressure

• Voltage from the battery

A milky appearance in engine oil is often a sign of:

• Low oil pressure

• Coolant leaking into oil

• Dirty oil filter

• Worn-out timing chain