MICHIGAN CDL AIR BRAKES
QUESTIONS & ACTUAL CORRECT
ANSWERS PASSED
Service Brake, Parking Brake, Emergency Brake - Correct Answer ✔✔ 3 different
braking systems that make up Air Brakes
Pumps air into storage tanks and connected to the engine via gears or a v-belt. -
Correct Answer ✔✔ Air Compressor
Controls when the air compressor will pump air into the air storage tanks. When tank
pressure rises to the cut-out level, the governor stops the compressor from pumping.
When the tank pressure falls to the cut-in level, the governor allow the compressor to
pump again. - Correct Answer ✔✔ Air Compressor Governor
125 PSI (Governor stops the compressor from pumping air) - Correct Answer ✔✔ Cut-
Out Level
100 PSI (Governor allows compressor to start pumping again) - Correct Answer ✔✔
Cut-In Level
Holds the compressed air. - Correct Answer ✔✔ Air Storage Tanks
Valve to drain oil and water from the tanks. - Correct Answer ✔✔ Air Tank Drains
Puts alcohol into the air system to reduce risk of ice in the valves. - Correct Answer ✔✔
Alcohol Evaporator
In the first take air is pumped in to...protects the tank and system from too much
pressure. Set to open at 150 PSI. - Correct Answer ✔✔ Safety Valve
Used at each wheel...most common type is the S-Cam drum brake. - Correct Answer
✔✔ Foundation Brakes
Drums located on each end of the axles. Wheels are bolted to the drums. To stop, the
brake shoes and linings are pushed against the inside of the drum. - Correct Answer
✔✔ Drums, Shoes and Linings
Pressure pushes the rod out, moving the slack adjuster, thus twisting the brake
camshaft. Forces the brake shoes away from one another and presses them against the
inside of the brake drum. - Correct Answer ✔✔ S-Cam Brakes
QUESTIONS & ACTUAL CORRECT
ANSWERS PASSED
Service Brake, Parking Brake, Emergency Brake - Correct Answer ✔✔ 3 different
braking systems that make up Air Brakes
Pumps air into storage tanks and connected to the engine via gears or a v-belt. -
Correct Answer ✔✔ Air Compressor
Controls when the air compressor will pump air into the air storage tanks. When tank
pressure rises to the cut-out level, the governor stops the compressor from pumping.
When the tank pressure falls to the cut-in level, the governor allow the compressor to
pump again. - Correct Answer ✔✔ Air Compressor Governor
125 PSI (Governor stops the compressor from pumping air) - Correct Answer ✔✔ Cut-
Out Level
100 PSI (Governor allows compressor to start pumping again) - Correct Answer ✔✔
Cut-In Level
Holds the compressed air. - Correct Answer ✔✔ Air Storage Tanks
Valve to drain oil and water from the tanks. - Correct Answer ✔✔ Air Tank Drains
Puts alcohol into the air system to reduce risk of ice in the valves. - Correct Answer ✔✔
Alcohol Evaporator
In the first take air is pumped in to...protects the tank and system from too much
pressure. Set to open at 150 PSI. - Correct Answer ✔✔ Safety Valve
Used at each wheel...most common type is the S-Cam drum brake. - Correct Answer
✔✔ Foundation Brakes
Drums located on each end of the axles. Wheels are bolted to the drums. To stop, the
brake shoes and linings are pushed against the inside of the drum. - Correct Answer
✔✔ Drums, Shoes and Linings
Pressure pushes the rod out, moving the slack adjuster, thus twisting the brake
camshaft. Forces the brake shoes away from one another and presses them against the
inside of the brake drum. - Correct Answer ✔✔ S-Cam Brakes
