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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Florida CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Florida CDL Manual. Take this practice test now to prepare for the actual FL CDL combination test!
1.
When checking the lights before driving:
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you should turn off the engine.
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you should check them from inside the vehicle.
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the engine must be running.
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make sure the parking brake is not set.
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2.
If your trailer starts to skid, you should:
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keep the rear of your vehicle close to the curb.
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accelerate slightly.
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release the brakes to get traction back.
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use the trailer hand brake (if you have one) to straighten out the rig.
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3.
If you are driving a 30 foot vehicle at 35 mph, you should leave at least _______ between your vehicle and the vehicle in front of you.
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2 seconds
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4 seconds
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1 seconds
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3 seconds
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4.
To secure the tractor you should:
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Put on the parking brake and put the transmission in neutral.
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Connect the tractor service air-line to the trailer service glad hand.
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Check that the kingpin and the fifth-wheel are aligned.
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All of the above.
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5.
Glad hands are used to:
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connect the brakes from the truck or tractor to the trailer.
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connect the electrical lines from the truck or tractor to the trailer.
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the air compressor is connected to the engine.
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connect the service and emergency air lines from the truck or tractor to the trailer.
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6.
If your ABS is not working:
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you should immediately bring your vehicle to a complete stop.
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you still have normal brake functions, and should drive and brake as you always have.
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it will slow your truck to a halt and force you to pull over.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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7.
If you have convex mirrors, be aware that:
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objects may appear to be faster than they really are.
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everything appears smaller in a convex mirror than it would if you were looking at it directly.
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in a convex mirror objects appears larger than they really are.
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objects seem closer than they really are.
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8.
When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.
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5
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10
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6
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4
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9.
On any upgrade, gravity:
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doesn't affect your speed.
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speed you up.
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doubles your speed.
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slows you down.
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10.
What can cause poor traction?
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Overloading the truck.
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Too much weight on the steering axle.
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Too little weight on the driving axles.
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All of the above.
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