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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. When coupling a tractor to a semi-trailer, after checking if the fifth-wheel is in proper position for coupling you should:
connect the air lines to the trailer.
connect the electrical cord and check the air lines.
make sure the area around the vehicle is clear and the trailer wheels are chocked.
secure the vehicle.
2. When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.
about 1/2 inch
no space
enough space
about 1 inch
3. ABS:
is an addition to your normal brakes.
should only be used on dry roads.
allows you to brake harder.
replaces your normal brakes.
4. A truck tractor with _________ requires the shortest stopping distance.
an empty trailer
Weight has no impact on stopping distance.
a fully loaded trailer
a lightly loaded trailer
5. If you get stuck on railroad tracks, you should:
stay in the vehicle and call for help.
have a helper push your vehicle.
get out of the vehicle and away from the tracks.
check the engine compartment quickly.
6. At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________  to be sure it is safe to proceed.
listen, look and stop
go, look and put the transmission in neutral
stop, look, and listen
go, stop and listen
7. Who is responsible for inspecting the cargo?
The driver
The shipper
The motor carrier
The person who loaded and secured the cargo
8. To avoid rollbacks when you start, you should:
put on the parking brake whenever necessary.
if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
release the parking brake only when you have applied enough engine power.
All of the above.
9. If you let air out of hot tires:
as the tire cools, the air pressure will be too low.
air pressure will increases, causing the tires to blow out.
the tires will cool off much sooner.
None of the above.
10. If you smell exhaust fumes in the cab, you should:
remember to conduct a post-trip inspection.
stop immediately.
open the windows.
wait for the next stop, then inspect your vehicle.
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IN CDL Combination Test

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