Quiz 01 (30)

Question 1

Many vehicle manufacturers recommend draining moisture and oil from a vehicle’s air tanks at what interval?

Answer 1

Daily.

Question 2

A braking system works by converting mechanical energy into what?

Answer 2

Heat.

Question 3

Which of these persons can perform brake readjustments on manual and automatic slack adjusters?

Answer 3

Certified technicians

Question 4

Spring brakes will normally start to apply when system pressure drops below…?

Answer 4

414 kPa (60 psi)

Question 5

As you press down on the brake pedal, what happens to the valve which is attached to it?

Answer 5

It opens wider.

Question 6

A warning device must alert the driver if the pressure in the air brake system falls to what level?

Answer 6

380 kPa (55 psi)

Question 7

Why do air brake systems have dual-service tanks?

Answer 7

For safety

Question 8

In an air brake system, what does the governor do?

Answer 8

Regulates the air pressure

Question 9

Spring brakes are applied when…?

Answer 9

Air pressure leaves the brake chamber

Question 10

In an air brake system, what purpose does the alcohol evaporator serve?

Answer 10

To prevent freezing

Question 11

Which of these vehicles is most likely to have air brakes?

Answer 11

A school bus

Question 12

Which is the only one of these that is part of a disc brake system?

Answer 12

Rotor

Question 13

When draining tanks on an air brake system, which tank should be drained first?

Answer 13

The supply tank

Question 14

The actual air brake system pressure range must never be lower than 552 kPa (80 psi) or higher than….

Answer 14

1000 kPa (145 psi)

Question 15

The pushrod stroke is produced by compressed air entering…?

Answer 15

The brake chamber

Question 16

Why is it important for you to know where compressed air from the air brake system on your vehicle exhausts?

Answer 16

Because it can be dangerous

Question 17

Where will you find the air pressure gauge for an air brake system?

Answer 17

On the vehicle dashboard

Question 18

The spring brake subsystem is designed for which of these?

Answer 18

Parking and emergencies

Question 19

If you are driving and a warning tells you that your air pressure is low, what should you do?

Answer 19

Stop immediately

Question 20

The air tanks for an air brake system can be found where?

Answer 20

Under or around the frame of the vehicle

Question 21

The supply tank for an air brake system does what?

Answer 21

Collects moisture and oil from the air

Question 22

At what pressure do safety valves on air brake systems normally open?

Answer 22

1035 kPa (150 psi)

Question 23

If an air brake system has an air dryer, where will it be found?

Answer 23

Between the compressor and the supply tank

Question 24

Under the Ontario Highway Traffic Act, an air brake system should never drop below what pressure?

Answer 24

552 kPa (80 psi)

Question 25

Moisture in an air brake system can be dangerous for what reason?

Answer 25

All of these: It can cause corrosion It can freeze in cold temperatures It can reduce the volume of air

Question 26

In a normal braking situation, most modern air brake vehicles will use automatic valves to do what?

Answer 26

Reduce the pressure at the front wheels

Question 27

Which of these can you expect from an air brake system that you will not get in a hydraulic brake system?

Answer 27

A split second delay

Question 28

The air compressor for an air brake system draws its power from where?

Answer 28

The vehicle's engine

Question 29

Where will you find air brake chambers?

Answer 29

On each wheel

Question 30

In an air brake system, the service brake subsystem is used for what?

Answer 30

Normal braking