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These 10 free IN-CDL questions are organized by exam domain, so you can see how each part of the Indiana CDL Permit Test (IN-CDL) blueprint is tested. Reveal the answer and explanation under each question.
A straight truck has a GVWR of 19,500 lb and tows a trailer with a GVWR of 12,500 lb. The manufacturer's GCWR for the combination is 32,000 lb. Assuming no passenger or hazardous-material trigger, which CDL group is required?
Correct answer: A - Class A
A 19-year-old Indiana driver meets all other CLP requirements and plans to operate a non-school-bus commercial vehicle only within Indiana. What is the correct licensing conclusion?
Correct answer: C - The driver may obtain an intrastate-only CLP but may not operate interstate or drive a school bus.
During a pre-trip inspection, a driver measures 3/32 inch of tread in every major groove of the left steering-axle tire. The other tires meet their applicable limits. What should the driver conclude?
Correct answer: B - Unacceptable; a steering-axle tire needs at least 4/32 inch.
At 52 mph, a driver is following traffic in a 70-foot tractor-semitrailer. Under good road and visibility conditions, what minimum following interval does the CDL manual rule call for?
Correct answer: B - 8 seconds
A driver inspected and secured the cargo before departure and again 45 miles into the trip. After another 90 miles, the driver changes duty status to off duty for a 15-minute break; only 2 hours 20 minutes have elapsed since the last cargo check. When is the next cargo inspection required?
Correct answer: D - Before resuming the trip after the break
Immediately after a front-tire blowout at highway speed, the vehicle begins pulling toward the failed tire. Which control sequence best preserves stability?
Correct answer: A - Grip the wheel, release the accelerator, avoid braking, then slow gradually.
Before descending a long, steep grade in a tractor-semitrailer, the brakes are cool and properly adjusted. The driver has selected a safe low gear. Which service-brake technique should be used to control speed?
Correct answer: D - Brake firmly to about 5 mph below the safe speed, release, and repeat.
A tractor-semitrailer is disabled on the shoulder of a divided highway where traffic approaches only from the rear. Visibility is clear, and no hill or curve blocks the view. How should the three reflective triangles be placed?
Correct answer: C - One on the traffic side within 10 feet of the rear, with the others about 100 and 200 feet behind
A fully charged tractor-semitrailer is chocked. With the engine off, parking brakes released, tractor-protection valve open, and service brake fully applied for one minute, pressure falls from 126 psi to 121.5 psi. What does this test show?
Correct answer: C - It fails because combination applied leakage may not exceed 4 psi per minute.
While checking a straight truck, the driver fans the brakes with the engine off. The low-air warning first sounds at 52 psi, and the parking-brake control pops out at 34 psi. How should the results be interpreted?
Correct answer: B - The warning fails, but the pop-out test passes.
The IN-CDL exam also covers these domains. Drill them in the full free practice test:
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