FREE Illinois CDL Practice Test 2024 - DMV Practice Test Page 3 of 7
You must pass a general knowledge test in order to obtain a Commercial Driver's License from the State of Illinois. This exam covers all facet of commercial driving, from fundamental vehicle maintenance to road abilities, cargo loading to emergency behavior. To receive your CDL license, you'll need to score at least 80% on this test. The following questions are taken directly from the Illinois CDL manual for 2024; each question includes a hint and a comprehensive explanation of the answer.
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15 . Exceeding the number of pull-ups allotted for a single exercise will result in:
An extra point against your score.
A driver is allowed to use two pull-ups without penalty during any skills test exercise, aside from the straight line backing exercise, during which only one pull-up is permitted. Exceeding the number of permitted pull-ups during a single exercise will result in automatic failure of the basic vehicle control skills test.
16 . Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:
Are not concerns.
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
17 . If you’re driving and the ABS warning light comes on, it means:
The ABS needs to be activated.
Vehicles with Anti-Lock Braking Systems (ABS) have yellow malfunction lights to alert the driver if something is wrong with the braking system. If these lights activate, the driver may have lost ABS on one or more wheels.
18 . To obtain a CDL for interstate commerce, an applicant must be at least:
25 years old.
You must be at least 21 years old to operate a motor vehicle involved in interstate commerce.
19 . Hydroplaning is like:
Walking.
Hydroplaning is similar to water skiing: your vehicle's tires glide along the road on a film of water without having traction with the surface of the road.
20 . After a tire has been changed, the driver should stop after a short distance to:
Check the air pressure of the tire.
After a tire is changed, you should stop after a short distance to ensure that the lug nuts are still safely in place.
21 . During a written exam:
Cell phones may be left on.
