Engine Diagnostics Quiz for Students

What is the primary purpose of engine performance analysis?

• To increase the vehicle's weight

• To assess the engine's efficiency and power output

• To change the engine's color

• To reduce the engine's size

Which of the following is a common tool used to read Diagnostic Trouble Codes (DTCs)?

• Multimeter

• Oscilloscope

• OBD-II scanner

• Torque wrench

What component is primarily responsible for delivering fuel to the engine in a fuel injection system?

• Carburetor

• Fuel pump

• Air filter

• Spark plug

Which of the following is a symptom of a faulty ignition system?

• Smooth acceleration

• Engine misfires

• Increased fuel efficiency

• Quiet engine operation

What is the main function of the catalytic converter in an emission control system?

• To increase engine noise

• To convert harmful gases into less harmful emissions

• To reduce engine temperature

• To improve fuel economy

Which sensor is responsible for measuring the amount of air entering the engine?

• Oxygen sensor

• Mass airflow sensor

• Knock sensor

• Throttle position sensor

What is the role of an actuator in an engine management system?

• To measure engine speed

• To control a mechanism or system

• To provide power to the battery

• To filter engine oil

Which of the following is a potential cause of high hydrocarbon emissions in a vehicle?

• Properly functioning catalytic converter

• Rich air-fuel mixture

• Clean air filter

• New spark plugs

What is the purpose of the crankshaft position sensor in an engine?

• To measure fuel pressure

• To monitor the position and rotational speed of the crankshaft

• To control the air conditioning system

• To adjust the seat position

In a fuel system diagnostic, what does a high fuel pressure reading typically indicate?

• A clogged fuel filter

• A faulty fuel pump

• A leaking fuel injector

• A restricted fuel return line