2024 HI CDL Practice Test: All - Test 2
Based on
2024 HI CDL Handbook
8. A tractor protection valve _________.
A
Monitors air pressure in the trailer.
B
All of the listed answers.
C
Is comparable to a sentry.
D
Tells the trailer air supply valve to shut off air to the trailer if it detects catastrophic air loos in the trailer.