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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.
You are driving on a slippery road during the day. What does the Driver’s manual say about how much space you should keep ahead of your truck?
2.
When the roads are slippery, you should:
3.
Which of these statements is true?
4.
Placing a phone call while driving:
5.
Methods to keep a cradle from sliding include:
6.
Why Do HOS Regulations Exist?
7.
Which of these is not a brake check you normally do during your walk-around inspection?
8.
On an accident scene, if a qualified helper is present you should:
9.
Drivers should be aware that convex mirrors will make reflections look:
10.
All of the following are requirements for transporting coils with eyes crosswise except:
11.
In case of tire failure, you should do all of the following except:
12.
Is the below example a completed 34 hour restart?
Day 1

Day 2

13.
The distance the truck will travel between noticing a hazard and hitting the brakes is:
14.
Which of these are not part of the front pre-trip inspection?
15.
After an accident, you should only move a severely injured person:
16.
What is a rub rail?
17.
The total weight of a powered unit, the trailer and the cargo is called?
18.
When securing building materials, how many knots are acceptable in the tiedown(s)?
19.
In bad weather many drivers tailgate large vehicles. What should you do?
20.
While exiting the vehicle for a 'look', how many points of contact must you keep with the vehicle at all times?
21.
Which of these statements about double clutching and shifting is true?
22.
The load carrying area of a truck, trailer, or intermodal container is referred to as the:
23.
What is the Federal standard for the weight limit on a single axle?
24.
You weigh the truck immediately before and after fueling. Based on the following, determine what percentage of the weight goes to each set of axles:

Before fueling:

steer: 11,100, drives: 32,600, gross: 71,400

After fueling:

steer:11,850, drives: 32,850, gross: 72,400

25.
In case you have to fight a fire, also aim the extinguisher:
26.
Escape ramps:
27.
Which of these should you NOT do in an emergency situation?
28.
Which of these statements about rear drive wheel braking skid is true?
29.
In addition to preventing engine freezing, proper coolant levels help:
30.
Some large trucks have curved mirrors. These mirrors:
31.
Which of these statements about brakes is true?
32.
An outside vehicle observation will be scored every time the driver:
33.
Which statement is true?
34.
When using tiedowns for securing cargo, what is the general rule regarding cargo length.
35.
You are driving a heavy vehicle. You must exit a highway using an off-ramp that curves downhill. You should:
36.
Cargo that isn't prevented from forward movement, and is 4 feet long and weighs 1,500 lbs requires a minimum of how many tiedowns?
37.
Any CDL holder found to operating a CMV with ANY alcohol in his/her system will be placed out-of-service for a minimum of:
38.
An intermodal container is:
39.
To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 mph on the shoulder. How should you move back into the pavement?
40.
Which of the following is NOT a characteristic of tire failure?
41.
Cargo must satisfy one of the following securement conditions except:
42.
What is aggregate working load limit?
43.
What is the minimum WLL used to block forward movement of cargo weighing 36,500 lbs?
44.
What is bell pipe concrete?
45.
What is the presumed resistance to horizontal movement of friction mats?
46.
Some of the serious driving errors that can be caused by alcohol include:
47.
You are driving on a two-lane road. An oncoming driver drifts into your lane and is headed straight for you. Which of these is most often the best action to take?
48.
Which of these is specifically prohibited when securing crushed or flattened vehicles?
49.
Which of these is true about mirror adjusting?
50.
Within the requirements for concrete pipe, which of these requires specific securement methods?
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