Air Brakes quiz 2

What part of the truck is the air compressor connected to?

• Engine

• Transmission

• Radiator

Answer explanation

The air compressor is connected to the engine of the truck, providing compressed air for various functions.

Having ABS on only one axle:

• Still allows you additional control when braking.

• Slows the vehicle but cannot stop it.

• Can be dangerous.

Answer explanation

Can be dangerous.

If the vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be in?

• Tight.

• Loose.

• Cracked.

Answer explanation

The air compressor drive belt should be in a tight condition if the vehicle has air brakes, and it should be checked before each drive.

What kind of force must emergency brakes use?

• Electrical.

• Heavy.

• Mechanical.

• Air pressure.

Answer explanation

Emergency brakes must use mechanical force.

When going down a steep downgrade,

• The air brakes should be used.

• The vehicle should be continually downshifted instead of using the brakes.

Answer explanation

When going down a steep downgrade, the vehicle should be continually downshifted instead of using the brakes.

A dual air brake system:

• Is a single air brake system with two different sets of controls.

• Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

• Consists of two separate air brake systems that share a single set of controls.

Answer explanation

A dual air brake system consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

What does an application pressure gauge do?

• Shows how much air pressure is available.

• Shows how much air pressure you are applying to the brakes.

• Shows how much air pressure would be required to stop the vehicle.

Answer explanation

Shows how much air pressure you are applying to the brakes.

At what psi is the safety valve set to open?

• 500 psi

• 150 psi

• 100 psi

• 200 psi

Answer explanation

The safety valve is set to open at 150 psi, as indicated in the question.

If using the spring brakes when hauling a heavy load, a complete stop will:

• Be impossible.

• Take a short amount of time.

• Take a long time.

Answer explanation

When hauling a heavy load and using spring brakes, a complete stop will take a long time due to the weight and momentum of the load.

Before driving a vehicle with a dual brake system, the driver should:

• Begin driving just after the vehicle starts.

• Let the vehicle warm up to ensure the fuel reaches the engine.

Answer explanation

Before driving a vehicle with a dual brake system, the driver should let the vehicle warm up to ensure the fuel reaches the engine.