Answer :
Final answer:
The statement is true. A tractor protection valve pops or activates when the pressure falls between 20-45 psi, to safeguard the tractor's braking system in case of a failure.
Explanation:
This statement is generally true. The tractor protection valve, which is an essential part of a truck's air brake system, is designed to close off the air supply to the trailer in case of a failure. This valve is usually set to ‘pop’ or activate when the air pressure drops somewhere in the ballpark of 20 to 45 psi (pounds per square inch), to protect the tractor's ability to brake even if there's a problem with the trailer's brake system.
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