Q
Why must air and electrical lines be inspected on a combination vehicle?
General Knowledgemedium
ADamaged lines can affect brakes and lights
BThey control the seat belt
CThey determine tire color
Detailed Explanation
Service, emergency, and electrical lines must be connected and undamaged for safe trailer operation.
Correct Answer: Damaged lines can affect brakes and lights
Reviewed by Baha Mustafa, CDL holder, against official CDL manuals and FMCSA rules.
Advertisement
Ready to practice for real?
Take our free, full-length General Knowledge practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
When inspecting a combination vehicle, why should air and electrical lines be checked?
General Knowledgeeasy
Why inspect air and electrical lines on a combination vehicle?
General Knowledgemedium
Why inspect air and electrical lines on a combination vehicle?
General Knowledgemedium
Why should a driver inspect air and electrical lines on a tractor-trailer?
General Knowledgemedium
Before driving a coupled tractor-trailer, what connection must be secure?
General Knowledgemedium
Keep Studying General Knowledge
Question pages help you review one rule at a time. To build test-day speed, move back into the full General Knowledge practice test and answer a mixed set without looking at the explanation first.
State CDL Practice Paths
After you understand this answer, use a state practice path to connect the federal CDL rule with the DMV test pages drivers search for most.
Advertisement