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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. If a worker is close to the roadway in a work zone, you should:
drive at the posted speed limit.
drive on the shoulder.
pull off the road and stop.
reduce your speed below the posted speed limit.
2. You are driving a combination vehicle and must use your brakes to avoid a crash. You should:
brake lightly and hold the steering wheel firmly.
use stab braking or controlled braking.
use the parking brake.
push the brake pedal as hard as you can and hold it there.
3. It's very important to distribute the cargo so it is:
as high up as possible.
in the centre of the load.
as low as possible.
piled up.
4. When checking air brakes on combination vehicles, which of the following is NOT part of checking that air flows to all trailers?
Opening the emergency line shut-off valve at the rear of the last trailer.
Pulling tractor forward until the fifth-wheel comes out from under the trailer.
Using the trailer handbrake to provide air to the service line.
Going to the rear of the rig.
5. The two most important things that a driver can do to prevent a rollover when driving a combination vehicle are:
Driving slowly around turns and keeping the cargo as close to the ground as possible
Keeping cargo near center of vehicle and driving slowly on the highway
Keeping cargo near the ground and driving slowly on the highway
Keeping cargo near the center of the vehicle and driving slowly on turns
6. Having ABS on only the trailer:
makes the trailer more likely to swing out.
is very dangerous.
still gives you more control over your vehicle during braking.
makes the trailer more likely to roll over.
7. You must check that all shut-off valves are in the open position except the ones:
on the middle trailer of a set of triples.
at the back of the last trailer.
on the first trailer in a set of triples.
on the first trailer in a set of doubles.
8. Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
50 psi
35 psi
150 psi
100 psi
9. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
50 miles
two hours
20 miles
25 miles
10. The service line is also called:
control line or signal line.
carrier line or control line.
signal line or air line.
pressure line or signal line.
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FL CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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