Question 1
A straight truck has a GVWR of 28,000 pounds and tows a trailer with a GVWR of exactly 10,000 pounds. How is the vehicle classified for CDL purposes?
Show answer & explanation
Correct answer: B - Class B
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These 10 free KY-CDL questions are organized by exam domain, so you can see how each part of the Kentucky CDL Permit Test blueprint is tested. Reveal the answer and explanation under each question.
A straight truck has a GVWR of 28,000 pounds and tows a trailer with a GVWR of exactly 10,000 pounds. How is the vehicle classified for CDL purposes?
Correct answer: B - Class B
A pre-trip inspection finds 3/32 inch of tread in every major groove on both a steering-axle tire and a drive-axle tire. Neither tire has another defect. Which assessment is correct?
Correct answer: C - The steering tire fails, but the drive tire meets the tread minimum
Before descending a long grade, a driver selects 35 mph as the safe speed. Which braking plan best controls speed without building excessive brake heat?
Correct answer: D - Select a low gear before descending, brake firmly to about 30 mph for roughly three seconds, release, and repeat at 35 mph
At highway speed, the right-front tire blows and the truck begins pulling right. The lane ahead is open. What should the driver do first?
Correct answer: A - Grip the wheel firmly, avoid braking at first, hold the lane, and slow before moving off the roadway
A driver inspected the cargo and securement 40 miles after departure. After traveling another 140 miles, the driver stops for a meal before either three hours or 150 additional miles has elapsed. Before resuming the trip, the driver must:
Correct answer: B - Inspect the cargo and securement again because every break triggers a recheck
After coupling a semitrailer, the tug test holds, but the visual inspection shows a narrow gap between the upper and lower fifth-wheel plates. The jaws appear closed. What is the proper response?
Correct answer: D - Keep the trailer secured, uncouple, correct the height or alignment, and recouple until there is no gap and the jaws lock around the kingpin shank
After coupling, the trailer reservoirs charge and the spring brakes release. Pressing the foot brake, however, produces no trailer service-brake response. Which connection should be inspected first?
Correct answer: C - The blue service or control line is disconnected or obstructed
During an engine-off air-brake inspection, which result exceeds the applicable test limit?
Correct answer: A - A combination vehicle loses 3.5 psi in one minute with the service brakes released
On a dual-air system, pressure rises from 85 to 100 psi in 42 seconds. The low-air warning activates at 60 psi, and the parking-brake controls pop out at 32 psi. No other defect is found. How should these results be interpreted?
Correct answer: C - All three results are within the published pre-trip criteria
A tractor will pull three semitrailers weighing 18,000, 26,000, and 12,000 pounds when loaded. Which order, from the tractor rearward, best reduces instability?
Correct answer: B - 26,000; 18,000; 12,000 pounds
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