Internal Combustion Engine Components and Diagnostics Quiz

What is the primary function of the camshaft in an internal combustion engine?

• To ignite the air-fuel mixture

• To open and close the engine valves

• To circulate coolant through the engine

• To drive the oil pump

Which component measures the amount of air entering the engine?

• Throttle position sensor

• Mass air flow sensor

• Oxygen sensor

• Crankshaft position sensor

A vehicle exhibits poor acceleration and increased fuel consumption. Which component is most likely faulty?

• Fuel injector

• Oxygen sensor

• Spark plug

• Air filter

What does a knocking noise from the engine under load typically indicate?

• Worn timing belt

• Incorrect ignition timing

• Low oil pressure

• Faulty alternator

Which of the following is a common symptom of a failing head gasket?

• Blue exhaust smoke

• Engine overheating

• High oil pressure

• Squealing noise from the belts

What is the purpose of the crankshaft position sensor?

• To monitor engine temperature

• To determine engine speed and position

• To control fuel pressure

• To measure exhaust emissions

Which component is responsible for maintaining the engine's operating temperature?

• Radiator

• Thermostat

• Water pump

• Fan belt

What is the function of the EGR (Exhaust Gas Recirculation) valve?

• To increase engine power

• To reduce nitrogen oxide emissions

• To improve fuel economy

• To control engine oil pressure

A misfiring engine is most likely caused by:

• Faulty spark plugs

• Worn brake pads

• Low coolant level

• Dirty air filter

Which component adjusts the air-fuel mixture during engine operation?

• Idle air control valve

• Throttle body

• Engine control unit (ECU)

• Fuel pressure regulator