ELDT ELDT - Entry Level Driver Training Air Brakes Questions and Answers

Question 1

What is the minimum air pressure required before driving a vehicle equipped with air brakes?

Accepted Answer

100 psi

Answer

60 psi

Answer

80 psi

Answer

120 psi

Question 2

What does the low air pressure warning activate in most air brake systems?

Accepted Answer

A warning light and/or buzzer

Answer

An automatic brake application

Answer

The parking brake release

Answer

The exhaust brake

Question 3

What is the purpose of the air compressor governor in an air brake system?

Accepted Answer

To control when the compressor cuts in and cuts out

Answer

To release air from the tanks

Answer

To monitor brake temperature

Answer

To regulate the spring brakes

Question 4

During the static air leakage test, what is the maximum allowable air pressure drop per minute for a combination vehicle?

Accepted Answer

3 psi

Answer

1 psi

Answer

2 psi

Answer

4 psi

Question 5

What type of brakes are spring brakes designed to act as?

Accepted Answer

Emergency and parking brakes

Answer

Service brakes

Answer

Trailer brakes only

Answer

Exhaust brakes

Question 6

What is brake fade and what causes it in air brake systems?

Accepted Answer

Reduced braking power caused by overheated brake drums

Answer

A sudden increase in brake pressure

Answer

Air leaking from brake lines

Answer

Improper slack adjuster setting