Asked by Dr. Richard Force on Jun 22, 2024
Verified
When a driver is using the trailer hand brake valve to stop a rig and then stomps on the treadle valve,what is the source of the trailer service control signal?
A) tractor primary circuit
B) tractor secondary circuit
C) trailer reservoirs
D) trailer hold-off circuit
Trailer Hand Brake Valve
A manually operated valve located within reach of the driver or operator to apply the brakes on a trailer independently.
Treadle Valve
A treadle valve, found in air brake systems of heavy vehicles, controls the air pressure delivered to the brakes in proportion to how much the pedal is pressed.
Trailer Service Control Signal
An electronic or pneumatic signal used to control the brakes and other systems on a trailer from the towing vehicle.
- Gain insight into the purposes and actions of constituents in air brake assemblies, including air compressors, slack adjusters, and brake chambers.
Verified Answer
KJ
Katrina JacquelynJun 27, 2024
Final Answer :
A
Explanation :
The trailer service control signal comes from the tractor primary circuit when a driver uses the trailer hand brake valve and then applies the treadle valve. This is because the primary circuit is responsible for controlling the braking system in a tractor-trailer setup, ensuring that the signal for braking is properly communicated from the tractor to the trailer.
Learning Objectives
- Gain insight into the purposes and actions of constituents in air brake assemblies, including air compressors, slack adjusters, and brake chambers.