Main menu
📖 Air Brakes Test
Page 5/8
41
If the spring brakes are on, when should you push the brake pedal?
Only when driving downhill.
Only on the slippery road.
Never ✓ CORRECT
42
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
Level ground, chock the wheels and release the parking brakes. ✓ CORRECT
Level ground and apply the parking brakes, then apply service brakes.
Level ground and drain off air pressure before checking the adjustment.
43
Excessive heat caused by using your brakes too often can also cause:
Modulated control valve to wear out.
Brake linings to split up.
Brake to fade or fail ✓ CORRECT
44
If you must make an emergency stop, you should brake so you:
Can steer hard while braking hard.
Can steer and so your vehicle stays in a straight line. ✓ CORRECT
Use the handbrake first.
45
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
Use of spring brakes.
The use of the front brakes limiting valve
The braking effect of the engine ✓ CORRECT
46
The most important thing to do when a low air pressure warning comes on is:
Upshift
Downshift
Stop and safely park as soon as possible. ✓ CORRECT
47
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
Spring Pressure ✓ CORRECT
Air pressure
Hydraulic pressure
48
Air braking takes more time than hydraulic braking because air:
Air brakes use different brake drums.
Takes more time to flow through the lines than hydraulic fluid. ✓ CORRECT
Brakes require heavier return springs.
49
When brakes are applied the brake shoes will press against the:
Brake drum or disc ✓ CORRECT
Slack adjuster
S-cam
50
When brakes are applied the brake shoes will press against the:
Brake drum or disc ✓ CORRECT
Slack adjuster
S-cam