How do you brake check on a school bus?

Start the bus and let the air pressure build to at least 90 psi. Step on the brake pedal and put the bus into gear. Slowly take your foot off the brake and gently press the accelerator. The bus should not move.

How do I learn to pre-trip?

Steps in Studying for a CDL Pre – Trip Inspection

  1. Make sure kingpins, ball joints, and shocks look good and have lubrication.
  2. Check fluid levels including windshield washer fluid, coolant, and oil.
  3. Look at steering axle tires for uneven wear.
  4. Look for fluid drips or leaks in and around the engine.

How long should a pre-trip inspection take?

It is the driver’s responsibility to ensure the vehicle is safe for operation and is free from defects. Currently, there are no guidelines as to how long a pre – trip inspection should take. If you check everything you should be checking, a full inspection should take you approximately 30 to 50 minutes.

How do you do a air brake test?

Class A Air Brake Test

  1. Make sure the air pressure is above 100psi – 120psi.
  2. Turn the key to the off position.
  3. Turn the key to the on position, do not start the truck.
  4. Press both air brake valves in, red valve first then yellow in second.
  5. Air pressure will drop, allow pressure to stabilize.
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Are air brakes hard to work on?

It’s very difficult to get air brakes to stop as smoothly as hydraulic. Air can be compressed, brake fluid can’t. When you apply pressure at one end of a hydraulic brake line, the same amount of pressure is immediately transferred to the other end.

Do school buses have hydraulic brakes?

Every school bus with a includes compressed air compressed air service brake portion of air over system shall have: hydraulic systems.

How do air brakes work on a bus?

Air brakes work using compressed air instead of hydraulic fluid. Air brakes can be either drum brakes or disc brakes, or a combination of both. Air is pressurized by an engine-mounted compressor. The air compressor then pumps the air into the air storage tanks, which store the compressed air until it’s needed.

Is the pre trip inspection test hard?

Learning the vehicle inspection portion of the CDL test is difficult for many students. In most states, there are over 100 items to be checked on the tractor-trailer. Passing the test requires each student to study and memorize the items tested.

What do you look for in a pre trip inspection?

A basic DOT pre – trip inspection includes checking your fluid levels, leaks, tires, 5th wheel, brakes, clutch, shock absorbers, ball joints, kingpins, gauges, lights, and more.

What is the second thing you should do on a pre trip inspection?

Next step for the pre – trip inspection is to check the side of the trailer and the tandems.

  • Wall – Make sure the wall is not damaged.
  • Lights – Lights should be on and flashing.
  • Tires – Tires should be properly inflated and have decent tread.
  • Hub seal – Make sure it’s not leaking and wiped with oil if transparent.

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