Asked by Taysha Garcon on Jun 22, 2024
Verified
Which of the following is true of hold-off pressure in current truck and trailer air brake systems?
A) maintained at 60 psi
B) regulated at 90 psi
C) subject to chassis system pressure
D) dumped when service brake is applied
Hold-off Pressure
The specific hydraulic pressure maintained to prevent a component or system from activating until the pressure exceeds a certain threshold.
Service Brake
The primary braking system used for normal vehicle operation, activated by the brake pedal.
Chassis System Pressure
The pressure maintained within the chassis system of a vehicle, which can include hydraulic or pneumatic systems used for braking or suspension.
- Enumerate the components and functions involved in truck air brake systems.
Verified Answer
TM
tatenda mafumaJun 25, 2024
Final Answer :
B
Explanation :
Hold-off pressure in current truck and trailer air brake systems is regulated at 90 psi. This pressure is crucial for the proper operation of the air brake system, ensuring that the brakes are applied smoothly and effectively.
Learning Objectives
- Enumerate the components and functions involved in truck air brake systems.