Engine Management System Quiz

What is the primary function of an engine management system?

• Playing music

• Cooking meals

• Watering plants

• Control and regulate the operation of the internal combustion engine

Explain the concept of air-fuel ratio in the context of engine function.

• The air-fuel ratio is the ratio of water to fuel in the combustion mixture.

• The air-fuel ratio is the ratio of nitrogen to fuel in the combustion mixture.

• The air-fuel ratio is the ratio of carbon dioxide to fuel in the combustion mixture.

• The air-fuel ratio is the ratio of air to fuel in the combustion mixture.

What are the main components of an engine control unit (ECU)?

• Microprocessor, input/output ports, memory, and software

• Tire pressure, windshield wipers, air conditioning, and radio

• Steering wheel, brake pedal, accelerator, and gear shift

• Battery, radiator, exhaust pipe, and spark plug

Describe the role of the throttle position sensor in engine control.

• It measures the tire pressure and adjusts the suspension system

• It controls the temperature of the engine oil

• It monitors the radio frequency for the car's entertainment system

• It monitors the position of the throttle valve and sends this information to the engine control unit (ECU) to adjust the air-fuel mixture.

How does the engine speed sensor contribute to the engine management system?

• It monitors the fuel efficiency of the engine

• It regulates the air intake of the engine

• It provides information about the engine's rotational speed to the engine management system.

• It controls the temperature of the engine

Explain the function of the oxygen sensor in an engine.

• It measures the tire pressure and adjusts the suspension for a smoother ride.

• It measures the amount of oxygen in the exhaust gases and helps adjust the air-fuel mixture for optimal combustion.

• It monitors the engine temperature and activates the cooling system when needed.

• It detects the level of windshield washer fluid and alerts the driver when it's low.

What are the common types of engine actuators used in modern vehicles?

• Oil filter actuators, windshield wiper actuators, and steering wheel actuators

• Throttle actuators, fuel injectors, and variable valve timing actuators

• Exhaust pipe actuators, transmission actuators, and brake actuator

• Spark plug actuators, radiator actuators, and air conditioning actuators

Describe the function of the fuel injector in the engine management system.

• Monitors the oil level in the engine

• Responsible for delivering the right amount of fuel into the combustion chamber at the right time.

• Controls the air intake into the combustion chamber

• Responsible for cooling the engine

What diagnostic procedures are used to identify engine misfires?

• Tire rotation

• Windshield wiper replacement

• OBD-II scan, compression test, spark plug inspection, and fuel injector testing

• Oil change

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

• Pour water into the gas tank to check for leaks

• Hit the engine with a hammer to see if it makes a sound

• Ask the car to diagnose itself

• Plug the scanner into the OBD-II port and follow the prompts to retrieve and interpret the diagnostic trouble codes (DTCs).