Air Brake 3

Question 1

The safety valve reduces pressure at ____ psi

Answer 1

150 PSI

Question 2

If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?

Answer 2

45s

Question 3

The stop light switch

Answer 3

Turn on the brake lights when you put on the air brakes

Question 4

If your vehicle has an alcohol evaporator, every day during cold weather you should

Answer 4

Check and fill the alcohol level

Question 5

To test air service brakes you should

Answer 5

Brake firmly while slowly moving forward

Question 6

What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?

Answer 6

Spring pressure

Question 7

Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure

Answer 7

Spring

Question 8

The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like

Answer 8

Spring pressure

Question 9

Emergency brake stabbing is (1st)

Answer 9

Press on the brake pedal as hard as I can

Question 10

The air compressor governor controls

Answer 10

When the air is pumped into the air tanks

Question 11

The use of brakes on a long and steep downgrade under normal conditions is only a supplement to

Answer 11

The braking effect of the engine

Question 12

Why drain water from the compressed air tanks?

Answer 12

Water can freeze in cold weather and cause brake failure

Question 13

If the air compressor should develop a leak, what keeps the air in the tanks?

Answer 13

The one-way check valve