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Free District of Columbia CDL General Knowledge Practice Test 2023

You are looking for actual practice for your coming CDL test? So you have come to the right place. Our DC General Knowledge Practice Test has the same questions as the real exam which is based on the DC CDL Manual. Our test covers most of the subject areas on the District of Columbia General Knowledge Test such as shifting techniques, railroad crossing safety, drunk driving laws, and much more to make you become a safer driver. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, don't worry, you can take this DC CDL practice test an unlimited number of times to make sure you learn all the questions. Our tests will refine your driving knowledge so you can earn your CDL and start driving on the roads. Let’s take our free CDL practice test now!

Our CDL practice tests:
Based on 2021 DC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DC CDL General Knowledge Test format:
50 questions
40 correct answers to pass
80% passing score
Study now
List of questions
1.
Define 'bolster':
2.
Which of these statements about emergency steering is true?
3.
What violation occurs on the below example?

Day 1



Day 2

4.
When are helpers needed to back your vehicle?
5.
Which of these statements about cold weather driving is true?
6.
Which of these statements about alcohol is NOT true?
7.
A hazard:
8.
"The driver’s manual suggests several things to do when you pass a vehicle. Which of these is NOT one of them?"
9.
Which of these is true about tires and hot weather?
10.
Concrete pipe loaded crosswise generally:
11.
Based on the following information, how much fuel can you legally add while remaining legal on the drive axles?

Percentage of fuel weight to drive axles: 25%

Weight Before Fueling: Steer: 11,275, drives: 33,800, gross: 77,420

12.
Which of these is true about notifying the authorities after an accident occurs?
13.
A tank vehicle endorsement is required to drive tank vehicles with a combined capacity of:
14.
To prevent rolling, how many points of contact are required, at minimum, for a boulder resting on a rounded or partially rounded side?
15.
What are the four basic weight limits?
16.
When securing rows of coils, requirements include all of the following, EXCEPT:
17.
To prevent brake fade you should:
18.
The maximum number of "looks" allowed during the driving exam is:
19.
You receive a scale ticket and your drive axles are 31,700 and your trailer tandems are 35,100. Based upon a trailer with 6 inch slider rail hole spacings, what is the minimum number of holes you would have to slide the tandems to get the weight legal, and what would the final weights be?
20.
If you are being tailgated, you should not:
21.
You must keep the papers about hauling hazardous materials:
22.
Any operator who refuses to submit to drug or alcohol testing, or who tests in excess of the legal limits, will be disqualified for a minimum of:
23.
Cargo and securement devices should be checked within how many miles after starting a trip?
24.
Steering wheel play should not be more than:
25.
Timber used for dunnage must be all of the following EXCEPT:
26.
What are most front-wheel skids caused by:
27.
When stopping behind another vehicle, a safe gap to leave is one that:
28.
What is the main factor that will limit how far back you can slide your tandems?
29.
Drivers of trucks and tractor-trailers with cargo must check that the cargo is well secured within the first ___ miles of the trip.
30.
When calculating directional forces, 'g' is expressed as:
31.
What is the total WLL of two 20mm nylon ropes and one 5/8-inch wire rope?
32.
Which of these statements about braking is true?
33.
What is the only acceptable cure for driver fatigue?
34.
Based on the following figures, how much fuel can you legally add while remaining legal on the drive axles?

Percentage of fuel weight to drive axles: 30%

Weight Before Fueling: Steer: 11,275, drives: 33,750, gross: 77,220

35.
After turning and getting up to speed:
36.
Which of these is not a type of retarder?
37.
Given that general cargo securement requires a WLL of at least 50% of cargo weight, how many 1/2-inch Grade 70 chains would be required for a load of 34,500 lbs?
38.
An ABS light that comes on or stays on while driving indicates:
39.
A 'hook-lift container' is:
40.
What is the best way to determine what percentage of the weight of fuel will go to each set of axles?
41.
The distance that you should look ahead of your vehicle while driving is about _____ at low speed.
42.
When a tiedown is attached directly to the cargo, what is the ideal angle where it attached to the vehicle?
43.
What is the maximum angle recommended for tiedowns securing cement pipe loaded crosswise, relative to the deck?
44.
All of the following are true of alcohol EXCEPT:
45.
Whenever you double your speed, it will require how much more distance to stop?
46.
If a straight vehicle (not trailer or articulation) goes into front-wheel skid, it will:
47.
The maximum number of encroachments allowed on a particular exam exercise is:
48.
Specific hazards to watch for when traveling through work zones include:
49.
CDL drivers from New York State require the Metal Coils Endorsement when transporting metals coils weighing:
50.
When securing paper rolls with friction mats as a primary method:
District-of-columbia Pre-Trip TestDistrict-of-columbia Hazmat TestDistrict-of-columbia School Bus TestDistrict-of-columbia Air Brake TestDistrict-of-columbia General Knowledge TestDistrict-of-columbia Combination Vehicles TestDistrict-of-columbia Doubles/ Triples Trailers TestDistrict-of-columbia Tanker Vehicles TestDistrict-of-columbia Passenger Vehicles Test