Free California CDL practice exam test. CDL pre test 2025.
You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:
You are about to back your tractor under a semitrailer. The trailer is at the right height when the:
Why should you be sure that the fifth wheel plate is greased as required?
Air brake equipped trailers made before 1975:
While driving behind other vehicle under good condition you should allow at least one second between you vehicle and the vehicle ahead for each ____ (how many) feet of your vehicle length?
Which part of the kingpin should the locking jaws close around?
California 2025 Commercial Driver's License computer test
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