The modulating control valves are used to:
Answer: slowly apply the spring brakes
Learn More :
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?
- When do the spring brakes come on?
- 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.
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.