When do the spring brakes come on?
Answer: When main air pressure is lost
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CDL Class B
- In a dual brake system, if one air system is very low on pressure:
- The air brake endorsement:
- Pressing and releasing the brake pedal unnecessarily can:
- Before driving a vehicle with a dual brake system, the driver should:
- What were front brake limiting valves used for?
- Pressing and releasing the brake pedal unnecessarily can
- What does the air compressor governor do?
- The brake pedal is part of which braking system?
- Where are ABS malfunction lamps located?
- Truck tractors with air brakes built after March 1, 1997 must have:
- What must be on all air tanks with air -braked vehicles?
- What part of the truck is the air compressor connected to?
- Before driving a vehicle with a dual air system, you must wait until the air compressor builds a minimum of ___ psi in both the primary and secondary systems.
- What kind of force must emergency brakes use?
- With brake drums, what happens if brakes become too hot?
- If the air pressure warning light comes on, you should:
- Before driving a vehicle with a dual brake system, the driver should:
- A dual air brake system:
- Why do some air brake systems use alcohol?
- The air storage tanks:
- When the brake pedal is pushed down, air brakes work:
- What can happen if the parking brakes are used in very wet weather?
- The safety valve located on the first tank opens:
- When you are going down a long or steep grade after selecting the proper gear, the proper method of braking is to brake until your speed is about __ miles per hour below your "safe" speed and then release your brakes.
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