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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.
Void filler is:
2.
The center of gravity of a load:
3.
Which statement below is false?
4.
"According to the driver’s manual, why should you limit the use of your horn?"
5.
Which of these statements about using turn signals is true?
6.
The BAC (Blood Alcohol Concentration) for commercial drivers to be considered intoxicated when driving a commercial vehicle is:
7.
High beams should be:
8.
Special permits will be required for loads that are:
9.
At what time does a violation occur on this log?
10.
Which of the following systems should receive extra attention during winter weather inspection?
11.
What is the maximum blood-alcohol concentration allowed for operating a school bus?
12.
Escape ramps on downgrades:
13.
What keeps an engine cool in hot weather driving?
14.
In case of illness that prevents you from driving safely, you should:
15.
Vehicles exempt from Certificate of Safety inspection requirements include:
16.
If your vehicle catches fire while you are driving, you should:
17.
How many tiedowns are required for cargo that is prevented from forward movement?
18.
Ideally, where would you like the cargo's center of gravity located?
19.
The distance that you should look ahead of your vehicle while driving amounts to about ___ miles at normal highway speed.
20.
You are traveling down a long, steep hill. Your brakes get so hot that they have failed. What should you do?
21.
To avoid driving when tired, if at all possible you should schedule your trips:
22.
Load securement for cargo weighing 29,650 lbs must be able to withstand upward force of how many lbs?
23.
All vehicles or drivers must carry:
24.
Drivers must inspect the securement of cargo every 150 miles or:
25.
What is a reusable, transportable enclosure that is especially designed with integral locking devices that secure it to a container chassis trailer to facilitate the efficient and bulk shipping and transfer of goods by, or between various modes of transport, such as highway, rail, sea, and air.?
26.
Which of the following require an additional CDL endorsement to drive?
27.
Which violations have occurred in the below example?
Day 1

Day 2
28.
What types of freight need to be secured properly?
29.
You may hang up on a railroad track if:
30.
If you are not sure what to use to put out a hazardous material fire you should:
31.
To satisfy general cargo securement requirements, what is the minimum WLL for securing vehicles under 10,000 lbs?
32.
Your log must include all of the following, EXCEPT:
33.
Who is responsible for inspecting securing devices and cargo within the first 50 miles?
34.
If unsure of the exact location of the center of gravity of your cargo, where would you rather have the center of gravity located if you couldn't get it centered?
35.
What is low-speed offtracking?
36.
In Oregon, the maximum weight on the steer axle is listed as 600 pounds per inch of tire tread width up to 20,000 pounds. Your steer tires have a load rating of 6,150 pounds each and are 10 inches wide. What is the maximum legal weight your steer axle can carry in Oregon?
37.
A DUI conviction for a CDL-holder will result in disqualification for a minimum of:
38.
The basic control skills exam allows for a maximum of how many points scored?
39.
What is the correct method of determining what percentage of fuel is distributed between the steer axle and the drive axles?
40.
All of these are requirements for securing longwood lengthwise EXCEPT:
41.
A steel coil weighing 21,000 lbs requires how much securement against forward movement?
42.
What does BAC stand for?
43.
You should always turn on your emergency four-way flashers when you:
44.
Which of these statements about the hazard of vehicle fire is true?
45.
When securing a single metal coil with eyes vertical:
46.
What is the minimum number of tiedowns to use on a load 4ft 7in long, and weighing 1,237 lbs?
47.
Which of the statements about an inspection of the suspension components is true?
48.
Working Load Limit (WLL)is defined as:
49.
Which log below contains at least one violation?
Day 1

Day 2
50.
There will be times when you must take a minimum of a 30 minute break off duty before performing which of the following tasks?
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