If your truck's air compressor has its own oil supply, when should you first check the oil level?

a) During your first en route inspection

b) Immediately after stopping

c) Before driving

Answer: c) Before driving

You are on a steep downgrade and have reached your "safe" speed of 40 MPH. You would apply the service brakes until your speed drops to ___ MPH.

a) 25

b) 30

c) 35

Answer: c) 35

Truck and bus parking or emergency brakes must be held on by:

a) Air pressure

b) A modulating control valve

c) Mechanical force

Answer: c) Mechanical force

What is emergency controlled braking?

a) You apply the brakes as hard as you can without locking the wheels

b) You brake as hard as you can, release the brakes when the wheels lock, and reapply the brakes when the wheels start rolling

c) Apply the hand valve for one second, then push the brake pedal hard

Answer: a) You apply the brakes as hard as you can without locking the wheels

The air brake lag distance at 55 MPH on dry pavement adds about ___ feet to your stopping distance.

a) 12

b) 32

c) 52

Answer: b) 32

During normal driving, spring brakes are usually held back by:

a) Bolts

b) Spring pressure

c) Air pressure

Answer: c) Air pressure