Question 1
A 60-foot tractor-semitrailer is traveling at 52 mph on a dry road. Under the timed-interval rule, what minimum following interval should the driver maintain?
Show answer & explanation
Correct answer: C - 7 seconds
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These 10 free WI-CDL questions are organized by exam domain, so you can see how each part of the Wisconsin CDL Permit Test blueprint is tested. Reveal the answer and explanation under each question.
A 60-foot tractor-semitrailer is traveling at 52 mph on a dry road. Under the timed-interval rule, what minimum following interval should the driver maintain?
Correct answer: C - 7 seconds
While cruising, a front tire suddenly blows. The truck pulls sharply, the steering wheel vibrates, and there is no immediate obstacle ahead. Which response gives the driver the best chance of maintaining control?
Correct answer: A - Hold the wheel firmly, stay off the brake, then brake gently after the truck slows
Cargo was inspected before departure and again 45 miles into the trip. After another 65 miles and 2 hours 10 minutes of driving, the driver takes a meal break. When is the next cargo inspection required?
Correct answer: D - Before resuming the trip after the break
A loaded combination vehicle is about to descend a long, steep grade where 35 mph has been selected as the safe speed. Which plan best protects the service brakes?
Correct answer: B - Select a low gear first; at 35 mph, brake to about 30 mph, then release
All tracks are clear when a tractor-trailer completes its required railroad stop. The driver has selected a gear. How should the crossing be completed?
Correct answer: C - Cross all tracks in the selected gear without shifting
During a properly conducted applied air-leakage test on a combination vehicle, pressure falls from 125 psi to 120 psi while the service brake is held for one minute. How should the result be classified?
Correct answer: A - Unacceptable; the 5 psi loss exceeds the combination-vehicle limit
While driving, the low-air warning is sounding and reservoir pressure is falling through 58 psi. The spring brakes have not yet applied. What action should follow?
Correct answer: D - Stop and park safely as soon as controlled braking permits
After the bulb check and after an air-brake vehicle has exceeded 5 mph, its ABS lamp remains on. Air pressure is normal and the foundation brakes respond normally. Which operating decision is appropriate?
Correct answer: B - Drive normally and arrange service for the ABS soon
During a coupling inspection, there is visible space between the upper and lower fifth-wheel plates even though the locking jaws appear closed. What does this finding require?
Correct answer: A - Recouple before moving; the kingpin may be above the closed jaws
On a wet downgrade, a driver begins using the trailer hand valve to keep the trailer aligned during routine braking. Which correction is appropriate?
Correct answer: C - Use the foot brake; reserve the hand valve for testing trailer brakes
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