Free District of Columbia CDL General Knowledge Practice Test 2022

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 2022 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
List of questions
1.
When using the brakes on a steep downgrade, which of the following applies?
2.
Turn signals facing the front should be amber or:
3.
In case of low friction between the cargo and deck, which of these is not a solution?
4.
When driving vehicles with ABS, braking:
5.
What is the best way to prevent brake failure on long downgrades?
6.
In case of a fire, you should pull off the road and do all of the following except:
7.
Which statement is true about extending the 14 hour on duty clock by using the 8 hour sleeper berth provision?
8.
When securing an intermodal container on a chassis, what is the maximum allowable vertical travel when secured?
9.
What is the aggregate WLL of one 7/15 inch Grade 43 chain, and three 5/16 inch Grade 70 chains?
10.
When loaded cement pipe over 45 inches in diameter, which pipes should be blocked, wedged, or otherwise immobilized?
11.
What violations occurred on Day 2 of this example?
Day 1

Day 2
12.
When securing building materials, spacer requirements include all of the following except:
13.
The principal way of controlling speed on downgrades is:
14.
A left-hand turn should end:
15.
All of the following are lighting requirements for combination vehicles longer than 20 feet or wider than 80 inches except:
16.
What factor has the greatest affect on how much weight is moved per hole in the tandem slider rail?
17.
Why should drivers avoid foreign objects in the road?
18.
What factors typically determine your blood alcohol concentration BAC?
19.
As part of the log packing requirements:
20.
A securement system must be capable of resisting how much lateral (side-to-side) force, at minimum?
21.
What will be the ultimate limitation that prevents you from putting the trailer tandems as far to the rear of the trailer as possible?
22.
You receive a scale ticket and your drive axles are 32,200 and your trailer tandems are 35,100. Based upon the two most common tandem slider rail hole spacings, what is the minimum number of holes you would have to slide the tandems to get the weight legal, and in which direction?
23.
Drivers who have trouble sleeping at night, fall asleep at odd times, or snore loudly, gasp, and choke in their sleep should:
24.
Who must complete a log?
25.
A chain marked with a
4 is identified as what kind?
26.
When confronted with an aggressive driver, you should do all of the following except:
27.
What are the two most common tandem slider rail hole spacings, and roughly how much weight is transferred per hole?
28.
What is the minimum allowable tread depth for every groove on the front tires?
29.
An anchor point is defined as:
30.
In the following picture, what are axles 2 and 3 commonly referred to as?

31.
In case of a fire in the cargo area of a van or box trailer, you should:
32.
Which of the following has the greatest affect on the gross vehicle weight?
33.
When securing a metal coil with eyes lengthwise, all of the following are steps for securement option #1 except for:
34.
How many anchor points should be used to secure an intermodal container on a chassis vehicle?
35.
Minimum tread depth on every groove on all tires must be at least:
36.
Where in the trailer could you place cargo so that the weight applied to the trailer tandems is greater than the weight of the cargo itself?
37.
What violation occurs at 2:00 p.m. on this example?
38.
Coming down steep, long, downgrades will require a driver to:
39.
When securing flattened or crushed cars on a vehicle with containment on 2 sides, how many tiedowns, at minimum, are required?
40.
When entering and exiting an expressway, and also generally any time you drive, you should:
41.
How many reflective triangles are required to be kept as part of a trucks emergency equipment?
42.
When stopping before a turn, do all of the following except:
43.
Low-beam headlights generally light to a distance of:
44.
If you lose pressure in hydraulic brakes, you can:
45.
A sign of a confused driver who may present a potential hazard is:
46.
Requirements for securing two stacks of shortwood loaded side-by-side include:
47.
The pre-trip inspection should show that the exhaust system is:
48.
As part of their pre-trip cargo securement inspection, drivers should:
49.
Which of the following will alter the gross vehicle weight?
50.
What kind of extinguisher would you use to fight an electrical fire?