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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Texas 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 Texas CDL Manual. Take this practice test now to prepare for the actual TX CDL combination test!
1. You should always try to back toward the driver's side because:
you can more easily correct any steering errors.
backing toward the left side is more dangerous.
you can watch the rear of your vehicle out the side window.
None of the above.
2. Rollovers happen when drivers:
brake too hard.
stop too often.
turn too fast.
turn too slowly.
3. Inspecting the fifth-wheel does NOT include:
checking that there are no cracks in the frame.
making sure that the fifth wheel is in the proper position for coupling.
checking for missing or damaged parts.
backing until the fifth-wheel just touches the trailer.
4. Before leaving your vehicle unattended, you should:
Remove the keys.
Chock the wheels.
Apply the parking brake.
All of the above.
5. If you have a manual transmission, when stopping don't _______ until the engine rpm is down close to idle.
shift to second gear
apply the brakes
push the clutch in
place the transmission in park
6. If you must drive slowly, how should you alert following drivers?
Turn on your taillights
Use your emergency flashers if it is legal
Help them out by signaling when it is safe to pass
Flash your brake lights
7. You should test the coupling by:
locking the pintle hook.
disconnect the safety chains.
pulling against the pin of the second semitrailer.
applying the parking brakes so the rig will not move.
8. Emergency brakes must be must be held on by:
mechanical force.
air pressure.
the locking mechanism.
9. Which of the following trailers can get stuck on raised crossings?
Moving van
Car carrier
All of the above.
10. As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
air escaping from the open valve.
a thumping sound.
a mechanical vibration.
the service line valve close.
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TX CDL Combination Test

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