41. If the spring brakes are on, when should you push the brake pedal?
Never
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.
43. Excessive heat caused by using your brakes too often can also cause:
Brake to fade or fail
44. If you must make an emergency stop, you should brake so you:
Can steer and so your vehicle stays in a straight line.
45. The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
The braking effect of the engine