10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
These 10 free WA-CDL questions are organized by exam domain, so you can see how each part of the Washington CDL Permit Test 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 combination's GCWR is 32,000 lb. The driver will not carry passengers or placardable hazardous materials. Which CDL class is required?
Correct answer: A - Class A; both combination-vehicle thresholds are met
During a pretrip inspection, a driver measures 3/32-inch tread on a steering-axle tire, 3/32-inch tread on a drive-axle tire, 3/32-inch tread on a trailer tire, and 1.5 inches of steering-wheel play at the rim of a 20-inch wheel. Which finding requires correction before operation?
Correct answer: D - The 3/32-inch steering-axle tread
A 60-foot combination is traveling at 45 mph on dry pavement. The driver is holding a six-second gap behind the vehicle ahead. Under the commercial-driver following-distance rule, what adjustment is needed?
Correct answer: B - Increase to at least seven seconds
At highway speed, the right-front tire suddenly blows and the steering wheel jerks. The lane ahead is clear. Which response gives the driver the best chance of keeping control during the first moments?
Correct answer: A - Hold the wheel firmly and avoid braking at first
A 16-foot, 18,000-lb machine is not blocked against forward movement. It has three tiedowns, each credited at 2,500 lb toward the aggregate working load limit. Which single change makes the securement compliant without removing an existing tiedown?
Correct answer: C - Add one tiedown contributing 2,000 lb
A passenger on an intercity bus becomes verbally threatening but has not attempted physical contact. The passenger demands to be let out immediately while the bus is on an unlit freeway segment with no safe shoulder; a staffed rest area is two miles ahead. The driver should:
Correct answer: B - Continue to the staffed rest area and get help
A motorcoach approaches a drawbridge that has neither a traffic signal nor an attendant. The span appears closed and traffic ahead is moving. How must the driver approach the draw?
Correct answer: D - Stop at least 50 feet before the draw and verify it is safe
With the engine off and brakes released, a combination vehicle loses 2.4 psi in one minute. With the service brake fully applied, it loses 4.6 psi in one minute after the initial pressure drop. Which interpretation is correct?
Correct answer: D - The released test passes, but the applied test fails
While descending a grade, a tractor-trailer's low-air warning activates at 61 psi. Braking still feels normal and the spring-brake control has not popped out. The proper response is to:
Correct answer: A - Stop safely before the spring brakes apply
After the combination has traveled at 10 mph, the trailer ABS malfunction lamp remains on, but a brake test shows normal service braking. Which conclusion is most accurate?
Correct answer: B - Foundation brakes may work, but the ABS defect needs repair
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