Test 2 Brakes

Question 0

2) of the spring brakes are on, when should you push the brake pedal?

Answer 0

Never

Question 1

1) you should know that your brakes are fading when:

Answer 1

You have to push harder in the brake pedal to control your speed on a downgrade

Question 2

3) the driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls bellow_psi.

Answer 2

55

Question 3

4) if your truck or bus has dual parking control valves, you can use pressure from a separate tank to:

Answer 3

Release the spring emergency/parking brakes to move a short distance

Question 4

5) the brake pedal in an air brake system:

Answer 4

Controls the air pressure applied to put on the brakes

Question 5

6) parking on emergency brakes of trucks and buses can be legally held on by_pressure.

Answer 5

Air

Question 6

7) the most common type of foundation brake found in heavy vehicles is the :

Answer 6

S-cam drum

Question 7

8) if your truck has a dual air system and one of the system is low on pressure:

Answer 7

Either the front or rear brakes will not be fully operational

Question 8

9) in air brake vehicles, the parking brakes should be used:

Answer 8

Any time the vehicle is parked

Question 9

10) the air compressor governor controls:

Answer 9

When air is pumped into the air tanks

Question 10

11) the stop light switch:

Answer 10

Turns on the brake lights to warn drivers behind you

Question 11

12) for air brake system in good condition, the air compressor should start pumping at about_ psi.

Answer 11

100

Question 12

13) the air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:

Answer 12

3 psi in one minute

Question 13

14) the braking power of the spring brakes:

Answer 13

Depends on the service brakes being in adjustment

Question 14

15) how should you check that the spring brakes come on when air pressure in the system drops below a certain level?

Answer 14

Chock the wheeled, apply the parking brake, shut the engine off, and pump the brake pedal to reduce air tank pressure

Question 15

16) if you are driving down a steep downgrade and you have reached your “safe” speed of 40 mph, you would apply the service brakes until your speed drops to_mph.

Answer 15

35

Question 16

17) the air brake lag distance at 55 mph on dry pavement adds about_feet to our stopping distance.

Answer 16

32

Question 17

18) repeatedly pressing and release (fanning) the brake pedal may result in:

Answer 17

The loss of brake air pressure

Question 18

19) emergency controlled braking is when you:

Answer 18

Apply the brakes as hard as you can without locking the wheels

Question 19

20) if your truck’s air compressor has it’s own oil supply, when should you first check the oil level?

Answer 19

Before driving