Combination
Question: 17 / 20Correct answers: 0
Time: 00:00
Over 1000+ CDL questions now available with translations in our mobile app!
If you are not pulling a trailer, why should you lock the tractor glad hands together (or use dummy couplers)?
AIt helps balance the air pressure between the tractor and trailer.
BTo make it easier to attach to a trailer later.
CIt will keep dirt or water out of the lines.