Test 2 Brakes Flashcards
2) of the spring brakes are on, when should you push the brake pedal?
Never
1) you should know that your brakes are fading when:
You have to push harder in the brake pedal to control your speed on a downgrade
3) the driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls bellow_psi.
55
4) if your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
Release the spring emergency/parking brakes to move a short distance
5) the brake pedal in an air brake system:
Controls the air pressure applied to put on the brakes
6) parking on emergency brakes of trucks and buses can be legally held on by_pressure.
Air
7) the most common type of foundation brake found in heavy vehicles is the :
S-cam drum
8) if your truck has a dual air system and one of the system is low on pressure:
Either the front or rear brakes will not be fully operational
9) in air brake vehicles, the parking brakes should be used:
Any time the vehicle is parked
10) the air compressor governor controls:
When air is pumped into the air tanks
11) the stop light switch:
Turns on the brake lights to warn drivers behind you
12) for air brake system in good condition, the air compressor should start pumping at about_ psi.
100
13) the air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
3 psi in one minute
14) the braking power of the spring brakes:
Depends on the service brakes being in adjustment
15) how should you check that the spring brakes come on when air pressure in the system drops below a certain level?
Chock the wheeled, apply the parking brake, shut the engine off, and pump the brake pedal to reduce air tank pressure
16) if you are driving down a steep downgrade and you have reached your “safe” speed of 40 mph, you would apply the service brakes until your speed drops to_mph.
35
17) the air brake lag distance at 55 mph on dry pavement adds about_feet to our stopping distance.
32
18) repeatedly pressing and release (fanning) the brake pedal may result in:
The loss of brake air pressure
19) emergency controlled braking is when you:
Apply the brakes as hard as you can without locking the wheels
20) if your truck’s air compressor has it’s own oil supply, when should you first check the oil level?
Before driving
