CDL General Knowledge (Washington DC)

First published: September 5, 2026Last verified: September 5, 2026Reviewed by the CertQuestUSA team

TL;DR

CDL General Knowledge (Washington DC): a 124-question practice bank for the real CDL Permit & Endorsement Exams standard, 2 full papers of 50 questions each with no repeats, every question citing the real regulation it comes from.

Where these questions come from

Every question in this bank cites a real source -- primarily FMCSA CDL Manual (77%) and 49 CFR (23%) of this exam's citations.

Not sure where you stand? Take the free diagnostic — 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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2

full papers, no repeats

50

questions per paper

124

questions in the bank

What this exam covers

Accident Procedures & Fires6%
Alcohol & Other Drugs8%
Basic Control & Shifting10%
Emergency Maneuvers & Skid Control10%
Staying Alert, Fatigue & Hours of Service6%
Hazard Perception & Distracted/Aggressive Driving8%
Hazardous Materials Awareness (General Knowledge)2%
Mountain Driving4%
Night Driving & Extreme Conditions10%
Railroad-Highway Crossings4%
Seeing & Communicating8%
Speed & Space Management10%
Vehicle Inspection14%

5 real sample questions

What typically causes a front-wheel skid?

A. Driving too slowly for conditions

B. Entering a curve too fast or braking too hard while turning, exceeding the front tires' traction

C. Using the parking brake while parked

D. Having too much tread depth on the front tires

Source: FMCSA CDL Manual §2.19

What is the recommended corrective action for a front-wheel skid?

A. Turn the wheel more sharply into the original turn to try to force the front tires to grip

B. Ease off the brake and reduce speed until the front tires regain traction, then steer as needed

C. Apply full throttle to pull the front end straight

D. There is no way to recover from a front-wheel skid

Source: FMCSA CDL Manual §2.19

A "jackknife" skid in a tractor-trailer combination most commonly begins with what?

A. The tractor drive wheels or trailer wheels locking up and losing traction, causing the trailer to swing

B. The steering axle tires overinflating

C. The trailer landing gear failing while underway

D. The fifth wheel release lever being pulled while parked

Source: FMCSA CDL Manual §2.19

What is the most important reason for performing a pre-trip inspection before every trip?

A. To satisfy your dispatcher that the truck left on time

B. To find problems that could cause a crash or breakdown before they happen on the road

C. To reduce the number of miles logged for the day

D. To avoid having to fill out any paperwork later

Source: FMCSA CDL Manual §2.1.1

A roadside inspector determines that a commercial motor vehicle has a safety defect serious enough to be an immediate hazard. What is the inspector authorized to do under 49 CFR 396.9?

A. Issue a warning only, since only the motor carrier can pull a vehicle from service

B. Declare the vehicle "out of service" until the defect is corrected

C. Impound the vehicle permanently

D. Fine the driver but allow the vehicle to continue to the next scheduled stop

Source: 49 CFR 396.9

Same exam, other states

AK AL AR AZ CA CO CT DE FL GA HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY

Frequently asked questions

How many questions are on the CertQuestUSA CDL General Knowledge (Washington DC) practice test?

124 questions total, split into 2 full papers of 50 each with no repeats across papers.

What topics does the CDL General Knowledge (Washington DC) test cover?

13 domains, with the heaviest weight on Vehicle Inspection (14%), Basic Control & Shifting (10%), and Emergency Maneuvers & Skid Control (10%).

Where do CertQuestUSA's CDL General Knowledge (Washington DC) questions come from?

Primarily FMCSA CDL Manual (77%) and 49 CFR (23%) of this bank's citations -- computed directly from this exam's own question sources, not a generic description.

Is there a free diagnostic for CDL General Knowledge (Washington DC)?

Yes -- 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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