ASVAB prep - Auto and Shop Information - Automotive Knowledge

Which automotive system uses the following components: battery, distributor, coil wire, and spark plugs?

Ignition system.

Which engine part opens and closes the engine's exhaust and intake valves?

Camshaft.

The purpose of a muffler is to _________.

Reduce noise.

Which automotive system uses universal joints, a drive shaft, and a clutch?

The transmission system.

Most automobile batteries are made of water and which acid?

Sulfuric acid.

When an ABS (or antilock brake system) is in operation, the driver will feel _________.

A pulsing of the brake pedal.

Which of the following is NOT part of an internal combustion engine?

Clutch.

What should you do if your temperature gauge on your car indicates that the car is overheating (in the red zone)?

Pull over and let the car cool down.

Which of the following systems connects directly to the internal combustion engine in an automobile?

The cooling system.

The ECU is known more commonly as the vehicle's _________.

Brain.

Which component produces the high voltage that is sent to the spark plugs?

Ignition coil.

The air-fuel mixture is determined by your car's _________.

ECM.

The pictured engine component is part of the secondary ignition system. What is it?

Spark plug.

Which system on an automobile uses shock absorbers?

The suspension system.

The brake caliper is an assembly that houses the _________.

Brake pads and pistons.

When you try and start an engine, you hear a clicking sound but nothing happens. What is the potential problem?

All of the answers.

What is the MOST popular cylinder arrangement for 6- and 8- cylinder engines?

V-type.

Which of the following can cause water sludge in engine crankcase oil?

Water condensation in the crankcase.

Engine coolant is circulated throughout an engine by the _________.

Water pump.

Which system is required to start an automobile?

Electrical.

Brake systems are hydraulically operated, meaning that they are operated by _________.

Fluid.

What is the CORRECT sequence of a four-stroke cycle gas engine?

Intake stroke, compression stroke, power stroke, exhaust stroke.

Moderated by the voltage regulator, system voltage during regular car operation is around _________.

15 volts.

If your car has a fuel injection system, which of the following will it NOT need?

Carburetor.

What part of a car's exhaust system is responsible for turning the toxic components of engine exhaust into less toxic compounds?

Catalytic converter.

The part of the tire that grips the rim of the wheel is the _________.

Bead.

The function of a catalytic converter is primarily to _________.

Change pollutants into substances that are less harmful.

What role does the coil wire play in an ignition system?

Transmits voltage from the coil winding to the distributor cap.

Which stroke of a four-stroke engine is responsible for generating the power that turns the crankshaft?

Power stroke.

The transmission's job is to _________.

Match engine speed to the desired vehicle speed.

This device dampens the up and down movements of the wheels. What is this?

Shock absorber.

Which automotive system uses fuses and an alternator?

The electrical system.

In a four-stroke engine, which of the following is NOT one of the four strokes?

Out-take.

The function of a brake drum or rotor is to act as _________.

All of the answers.

Where is oil held when it isn't lubricating the system?

The oil pan.

Of which automotive system does the driver have the MOST direct control while driving?

The braking system.

On which popular type of tire are the cord plies arranged at 90 degrees to the direction of travel?

Radial.

An internal combustion engine in which the cylinders are aligned in two banks, which are at an angle to each other, is known as a _________.

V-engine.

An engine's job is to convert fuel into _________.

Torque.

The catalytic converter converts toxic gases into compounds such as _________.

Carbon dioxide.

Brakes work by converting the car's kinetic energy into _________.

Heat energy.

Power to run a car's CD player comes from the _________.

Battery.

During the compression stroke, the piston moves towards which position?

TDC.

What type of combustion system powers automobiles?

Internal.

What is the ideal air-to-fuel ratio in a typical engine?

14.7:1

Which of the following items is a part of the braking system in an automobile?

All of the answers.

The typical type of battery found in MOST vehicles is a _________.

Lead-acid battery.

The alternator is driven by the engine's _________.

Crankshaft.

If one complete revolution of the steering wheel causes the wheels to turn 20 degrees, what is the steering ratio?

18:1

Which of the following will NOT occur from setting a spark plug gap wider?

A smaller weaker spark.

Which part of the fuel system sprays a fuel and air mixture into the engine's combustion chamber?

Fuel injector.

Which of the following is the location of the differential on a drive axle?

D

Engine torque is transmitted to an automatic transmission via a _________.

Torque converter.

In the diagram, what is the location of the fuel pressure regulator?

C

How does an increase in pressure affect the coolant's boiling point?

Increases it.

Which component controls the amount of current that the alternator sends to the battery?

Regulator.

What is the purpose of a fuel rail?

Supplies fuel to the fuel injectors.

Which of the following components prevents a car's battery from being overcharged?

Voltage regulator.

The pictured component moves up and down inside the cylinder. It is called the _________.

Piston.

Engine oil viscosity can BEST be described as _________.

Resistance to flow.

Which of the following is probably NOT a cause of an engine overheating?

Cracked distributor cap.

What part of the internal combustion engine seals the combustion chamber and is subjected to high temperatures and pressures?

Piston rings.

Which type of automotive tool is used to measure the thickness of brake pads?

Brake caliper gauge.

In an automotive electrical system, what component supplies electrical power to the battery and to the rest of the vehicle's electrical components?

Alternator.

Which braking system component converts hydraulic pressure into mechanical force to stop the vehicle?

Brake calipers.

What type of fuel system is commonly used in modern vehicles to deliver fuel to the engine?

Electronic fuel injection (EFI).

What component in the fuel system is responsible for pressurizing the fuel and delivering it to the fuel injectors?

Fuel pump.

In an automotive electrical system, what does the alternator primarily do?

Generate electrical power.

Which component of an internal combustion engine is responsible for igniting the air-fuel mixture?

Spark plug.

Which automotive tool is used to measure the voltage output by the vehicle's battery?

Multimeter.

What is the purpose of an anti-lock braking system (ABS) in a vehicle?

Prevent wheel lock-up.