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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Indiana 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 Indiana CDL Manual. Take this practice test now to prepare for the actual IN CDL combination test!
1. Inspecting the fifth-wheel does NOT include:
backing until the fifth-wheel just touches the trailer.
checking that there are no cracks in the frame.
checking for missing or damaged parts.
making sure that the fifth wheel is in the proper position for coupling.
2. When transporting cargo, the cargo should be checked:
before the trip and after the first 50 miles.
before the trip and after the first 150 miles.
only after the trip.
only before the trip.
3. After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
shutting the engine off so you can hear the brakes.
checking the air brake system pressure gauge for signs of major air loss.
All of the above.
4. If your vehicle gets stuck on the railroad tracks, you should:
check for identifiable landmarks to give the location of the crossing.
get out of your vehicle and away from the tracks.
gather up your paperwork and shipping papers while calling 911, then get out of the vehicle.
All of the above.
5. When going down grades, you should:
put the transmission in Neutral.
downshift to a lower gear.
shift up.
rely solely on engine braking to reduce your speed.
6. To prevent a rollover, the driver should:
drive slowly around corners, on ramps, and off ramps.
drive on the shoulder if possible.
make quick lane changes if possible.
pay extra attention to the coolant level.
7. Which of the following is most likely to roll over?
The middle trailer of a triple
The rear trailer of a triple
The front trailer of a double
The rear trailer of a double
8. If your trailer starts to skid, you should:
use the trailer hand brake (if you have one) to straighten out the rig.
accelerate slightly.
release the brakes to get traction back.
keep the rear of your vehicle close to the curb.
9. Overloading a vehicle with cargo can have negative effects on all of the following except:
Weight limits
Speed control
10. If the drive wheels start to skid:
push in the clutch to let them turn freely.
use the brakes to slow down.
accelerate slightly to regain control.
All of the above.
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IN CDL Combination Test

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