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DC CDL General Knowledge Practice Questions - District of Columbia Commercial Driver License General Knowledge Test Exam
Practice mode
Question
1
of 25
QUESTION 1 / 25
To obtain a DC DMV CDL learner permit, what must an applicant do first?
Choose one answer below.
A
Pass all required CDL knowledge tests for the needed class and endorsements
✓
B
Schedule the road skills test before any knowledge test
✓
C
Complete the vehicle inspection skills test only
✓
D
Hold a passenger endorsement before testing
✓
QUESTION 2 / 25
Where does DC DMV require CDL knowledge-test applicants to go for testing?
Choose one answer below.
A
Any DC DMV service center that offers regular knowledge tests
✓
B
The Deanwood Road Test/CDL Services Office with required documentation
✓
C
A private truck stop testing kiosk
✓
D
An online virtual knowledge-test portal
✓
QUESTION 3 / 25
What language rule applies to DC DMV CDL knowledge tests?
Choose one answer below.
A
They are available in all languages offered for non-commercial tests
✓
B
They are in English only
✓
C
They may be taken through an interpreter
✓
D
They are available only in Spanish and English
✓
QUESTION 4 / 25
What is the DC DMV time limit for the CDL General Knowledge test?
Choose one answer below.
A
60 minutes
✓
B
75 minutes
✓
C
90 minutes
✓
D
No published time limit
✓
QUESTION 5 / 25
Under federal CDL standards, what score is needed to pass a knowledge test?
Choose one answer below.
A
70 percent
✓
B
75 percent
✓
C
80 percent
✓
D
90 percent
✓
QUESTION 6 / 25
What fee does DC DMV publish for each CDL knowledge test?
Choose one answer below.
A
No fee if the applicant fails
✓
B
10 dollars per test
✓
C
39.95 dollars for every CDL test
✓
D
117 dollars per knowledge-test attempt
✓
QUESTION 7 / 25
If an applicant fails a DC DMV CDL knowledge test, when may the applicant retest?
Choose one answer below.
A
The same day
✓
B
After three calendar days, on the fourth day
✓
C
After 30 days for every failure
✓
D
Only after completing a road test
✓
QUESTION 8 / 25
What happens if a DC CDL applicant fails the CDL knowledge test six times within a 12-month period?
Choose one answer below.
A
The seventh attempt is free
✓
B
The applicant must wait 12 months after the first failure before taking the seventh test
✓
C
The applicant may continue retesting every fourth day indefinitely
✓
D
The applicant must take only the road test
✓
QUESTION 9 / 25
For a DC Class A CDL without endorsements, which knowledge tests are listed as required?
Choose one answer below.
A
General Commercial, Combination, and Airbrakes
✓
B
General Commercial only
✓
C
Passenger and School Bus only
✓
D
Tank and Hazardous Material only
✓
QUESTION 10 / 25
For a DC Class B CDL without endorsements, which knowledge tests are listed as required?
Choose one answer below.
A
General Commercial and Airbrakes
✓
B
General Commercial and Combination
✓
C
Passenger, School Bus, and Tank
✓
D
Hazardous Materials only
✓
QUESTION 11 / 25
For a DC Class C CDL, which base knowledge test is listed as required?
Choose one answer below.
A
General Commercial
✓
B
Combination Vehicles
✓
C
Doubles/Triples
✓
D
Tank Vehicle
✓
QUESTION 12 / 25
What does FMCSA require state CDL knowledge tests to measure?
Choose one answer below.
A
Only memorized state fee schedules
✓
B
The knowledge and skills in 49 CFR Part 383 Subpart G for the vehicle group or endorsement
✓
C
Only road-sign recognition
✓
D
Only the applicant’s ability to shift a manual transmission
✓
QUESTION 13 / 25
Which topic is part of FMCSA required general CDL knowledge?
Choose one answer below.
A
Safe operations regulations, including inspection and safe operation rules
✓
B
Income-tax filing for owner-operators
✓
C
Passenger fare collection methods
✓
D
Forklift certification
✓
QUESTION 14 / 25
During an approach to a parked commercial vehicle for inspection, what should the driver look for first?
Choose one answer below.
A
General condition, leaning, damage, and fresh leaks under the vehicle
✓
B
Only the trailer registration plate
✓
C
Only the radio antenna
✓
D
Only whether the sleeper berth is clean
✓
QUESTION 15 / 25
Which engine-compartment items should be checked during a pre-trip inspection?
Choose one answer below.
A
Oil, coolant, power steering fluid, belts, hoses, and visible leaks
✓
B
Only the windshield-washer cap
✓
C
Only the vehicle identification number
✓
D
Only the engine paint color
✓
QUESTION 16 / 25
Why must a driver check lights and reflectors during the pre-trip inspection?
Choose one answer below.
A
They are needed for visibility, communication, and legal safe operation
✓
B
They affect only vehicle resale value
✓
C
They are inspected only on passenger buses
✓
D
They are optional during daylight
✓
QUESTION 17 / 25
What condition makes a tire unsafe during inspection?
Choose one answer below.
A
Proper inflation and no damage
✓
B
A sidewall bulge, serious cut, or exposed fabric
✓
C
Matching tires on the same axle
✓
D
A valve cap installed securely
✓
QUESTION 18 / 25
What minimum tread depth is required on front steering axle tires of a CMV?
Choose one answer below.
A
2/32 inch
✓
B
4/32 inch
✓
C
1/32 inch
✓
D
No minimum if the tire is inflated
✓
QUESTION 19 / 25
What minimum tread depth is generally required on non-steering axle CMV tires?
Choose one answer below.
A
4/32 inch
✓
B
2/32 inch
✓
C
6/32 inch
✓
D
No tread if chains are carried
✓
QUESTION 20 / 25
What should be checked on wheel rims during inspection?
Choose one answer below.
A
Cracks, bends, welding repairs, and loose or missing lug nuts
✓
B
Only whether the rim is polished
✓
C
Only tire brand labels
✓
D
Only the color of the wheel cover
✓
QUESTION 21 / 25
What should a driver look for when inspecting steering components?
Choose one answer below.
A
Loose, worn, bent, damaged, or missing parts
✓
B
Only whether the steering wheel cover is attached
✓
C
Only tire valve-stem caps
✓
D
Only whether the horn button looks new
✓
QUESTION 22 / 25
Why should exhaust components be inspected during a pre-trip?
Choose one answer below.
A
Leaks or poor mounting can allow fumes into the cab or damage nearby lines and wiring
✓
B
Exhaust color determines the CDL class
✓
C
Only diesel vehicles require exhaust systems
✓
D
Exhaust inspection is used only for passenger endorsements
✓
QUESTION 23 / 25
What emergency equipment is commonly required on a CMV?
Choose one answer below.
A
A properly charged fire extinguisher, spare fuses if needed, and three warning devices
✓
B
A household smoke detector only
✓
C
A snow shovel and extra shoes
✓
D
A spare steering wheel
✓
QUESTION 24 / 25
When a CMV is stopped on the road for a breakdown, how soon should warning devices generally be placed?
Choose one answer below.
A
Within 10 minutes
✓
B
After the next rest break
✓
C
Only after police arrive
✓
D
Only after sunset
✓
QUESTION 25 / 25
What is the purpose of a driver vehicle inspection report when defects are found?
Choose one answer below.
A
To notify the carrier about defects that may affect safe operation before the vehicle is used again
✓
B
To replace all future pre-trip inspections
✓
C
To document fuel purchases
✓
D
To avoid repairing defects until annual inspection
✓
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