CDL Combination Vehicles Test
Try this short CDL license combination vehicles practice test to check your knowledge about the safe operation of a combination vehicle.
CDL manual (study section 6 for this test)
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#1. True or False: Combination vehicles are usually heavier, longer, and require more driving skill than single commercial vehicles.
#2. The following 2 things will help you prevent rollover–___________, and drive slowly around turns.
A high center of gravity
A low center of gravity
#3. True or False: More than half of truck driver deaths in accidents are the result of truck rollovers.
#4. When not carrying as full load, make sure your cargo is _____________.
fastened along 1 side of the trailer
centered and spread out as much as possible
#5. “________ ________” causes the crack-the-whip effect.
#6. True or False: Large combination vehicles take longer to stop when they are empty than when they are fully loaded.
#7. When the wheels of a trailer lock up, the trailer will tend to ___________.
#8. When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called __________.
Both of these
#9. Whenever you back up with a trailer, try to position your vehicle so you can back _______________.
in a straight line
#10. If you must back up on a curved path, back toward the ___________.
#11. As soon as you see the trailer getting off the proper path, correct it by turning the top of the steering wheel __________.
in the direction of the drift
in the opposite direction of the drift
#12. What type of trailers can get stuck on railroad-highway crossings?
trailers with low underneath clearance
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