Air Brake Practice Test 1

A braking system works by converting mechanical energy into what?

• Water

• 
  Air

• Heat

• 
  Gas

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

• 
  Because it can be dangerous

• 
  So that you can clean them

• 
  It isn't particularly important

• So that you can check their pressure

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

• A large sedan

• A pickup truck

• A school bus

• 
  A motorcycle

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

• Rotor

• Drum

• 
  Lining

• Shoe

Normal air brake system pressure range is around…?

• 380 to 420 kPa (55 to 60 psi)

• 138 to 173 kPa (20 to 25 psi)

• 
  690 to 828 kPa (100 to 120 psi)

• 1035 to 1135 kPa (150 to 164 psi)

How many connections must be made to join a trailer's brake system to the brake system of the towing vehicle?

• 
  Two

• 
  Three

• One

• Four

On which of these vehicles are you most likely to find a DD3 Safety Actuator?

• A large pickup

• A stretch limousine

• A motorcoach

• A long trailer

Trailer hand valves can be used for...?

• 
  Normal braking

• Any of these

• 
  Parking

• Emergency braking

In the majority of air brake systems, the parking and emergency brakes are applied by doing what to the control?

• Twisting it to the left

• Pulling it out

• Twisting it to the right

• 
  Pushing it in

You have finished your delivery and unhitched from your trailer. What should you do with the trailer supply valve?

• 
  Push it in

• 
  Turn it to the left

• 
  Pull it out

• Turn it to the right