Q
An air supply control lever should be in its 'normal' position when you are:
Combination Vehiclesmedium
APerforming maintenance
BPulling a trailer
CParked
Detailed Explanation
The correct answer is "Pulling a trailer". This is based on federal CDL regulations and safety standards.
Correct Answer: Pulling a trailer
Ready to practice for real?
Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
32. Which type of truck-trailer combination has the best chance of the 'crack the whip' rollover?
combination-vehiclesmedium
16. For coupling to be completed, the safety catch for the fifth wheel locking lever must be:
combination-vehiclesmedium
4. When you get ready to back under the semi trailer you should line up:
combination-vehiclesmedium
A shut-off valve:
combination-vehiclesmedium
During a trip, which shut-off valves should be open?
combination-vehiclesmedium