Automotive Level 3 LV07 Quiz

What is the purpose of an automotive engine diagnostic?

• To improve the fuel efficiency of the vehicle

• To change the color of the car

• To make the engine run faster

• To identify and troubleshoot issues with the engine

What are the common symptoms of a faulty automotive engine?

• Smooth idling, increased power, pleasant noises, and minimal exhaust smoke

• No symptoms at all

• Decreased fuel consumption, improved performance, and reduced emissions

• Rough idling, stalling, loss of power, strange noises, and excessive exhaust smoke

Explain the process of using an OBD scanner for automotive engine diagnostics.

• Use the OBD scanner on the tires to diagnose the engine

• Take the OBD scanner to a mechanic for engine diagnostics

• Connect the OBD scanner to the vehicle's radio to diagnose the engine

• Connect the OBD scanner to the vehicle's OBD port, turn on the ignition, and follow the scanner's prompts to diagnose the engine.

What are the main components of an automotive engine that are checked during diagnostics?

• Brake pads, steering wheel, transmission fluid

• Spark plugs, fuel injectors, ignition coils, and engine compression

• Tire pressure, windshield wipers, air conditioning

• Exhaust pipe, radiator, dashboard lights

How can a mechanic determine if an automotive engine has a compression problem?

• Inspect the windshield wipers

• Check the tire pressure

• Perform a compression test using a compression gauge

• Listen for unusual engine noises

What are the main components of an automotive fuel system?

• Tires, windshield wipers, headlights, battery

• Engine, transmission, suspension, brakes

• Fuel tank, fuel pump, fuel filter, fuel injectors, and fuel lines

• Exhaust system, radiator, air conditioning, steering

Explain the function of a fuel pump in an automotive fuel system.

• It filters the air entering the engine.

• It regulates the temperature of the engine.

• It controls the steering of the vehicle.

• It pumps fuel from the fuel tank to the engine.

What are the differences between a carburetor and a fuel injection system in automotive fuel systems?

• Carburetors and fuel injection systems both inject fuel directly into the engine's combustion chamber.

• Carburetors mix air and fuel together before it enters the engine, while fuel injection systems inject fuel directly into the engine's combustion chamber.

• Carburetors and fuel injection systems both mix air and fuel together before it enters the engine.

• Carburetors inject fuel directly into the engine's combustion chamber, while fuel injection systems mix air and fuel together before it enters the engine.

How does a fuel pressure regulator work in an automotive fuel system?

• It increases the fuel pressure in the fuel system

• It decreases the fuel pressure in the fuel system

• It maintains a constant fuel pressure in the fuel system.

• It has no effect on the fuel pressure in the fuel system

What are the common causes of a lean or rich air-fuel mixture in an automotive fuel system?

• Low tire pressure

• Loose gas cap

• Faulty windshield wipers

• Vacuum leaks, dirty or clogged fuel injectors, faulty oxygen sensor, faulty fuel pressure regulator, dirty or clogged air filter, malfunctioning mass airflow sensor