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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Idaho 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 Idaho CDL Manual. Take this practice test now to prepare for the actual ID CDL combination test!
1. When transporting cargo, the cargo should be checked:
before the trip and after the first 150 miles.
only before the trip.
before the trip and after the first 50 miles.
2. Which of these is NOT part of the basic method for shifting up?
Accelerate while pressing the clutch and turn toward the driver's side.
Release the accelerator, push in the clutch and shift to neutral at the same time.
Push in the clutch and shift to the higher gear at the same time.
3. Empty trucks:
require shorter stopping distances than fully-loaded trucks.
have better traction than fully-loaded trucks.
may have poor traction.
4. When more cargo is piled up in a truck, the truck becomes easier to turn over. Fully loaded rigs are _________ to roll over in a crash than empty rigs.
ten times more likely
five times more likely
three times more likely
5. Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
greater; more
less; more
greater; less
6. ABS helps you:
steer gently and smoothly while you are braking.
increase your normal braking capability.
avoid wheel lock up and maintain control of your vehicle when you brake.
7. If an aggressive driver is involved in an accident down the road, you should:
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
confront the aggressive driver.
try to get their vehicle to the side of the road.
8. Which of the following is NOT a warning sign of fatigue?
Frequent blinking
Driving at the speed of the traffic
Heavy eyelids
9. Before entering a curve, you should:
maintain your speed.
reduce your speed.
increase your speed.
10. When backing a tractor under a trailer:
the end of the kingpin will be even with the top of the fifth wheel.
the fifth-wheel will come out from under the trailer.
the trailer will be lifted slightly when the tractor backs under it.
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ID Combination Test

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