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.
To prevent a load from shifting, there should be at least one tie down for every ____ feet of cargo.
2.
When using the brakes on a steep downgrade, which of the following applies?
3.
Which of these is not part of the pre-trip inspection of the engine compartment?
4.
You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?
5.
By law, who is ultimately responsible for ensuring the safety and road-worthiness of a CMV?
6.
In case of tire failure, all of the following will be steps in your response except:
7.
When driving vehicles with ABS, braking:
8.
What is the best way to prevent brake failure on long downgrades?
9.
What should you do before driving in mountains?
10.
What time does a 14 hour rule violation occur?
11.
When securing an intermodal container on a chassis, what is the maximum allowable vertical travel when secured?
12.
What does the 14 hour on duty limit mean?
13.
If you have to make a vehicle inspection report you must sign it
14.
To stop a drive-wheel skid, you should:
15.
When should drivers inspect their vehicles?
16.
Which of these is true about hazardous materials:
17.
When loaded cement pipe over 45 inches in diameter, which pipes should be blocked, wedged, or otherwise immobilized?
18.
Retarders:
19.
When securing building materials, spacer requirements include all of the following except:
20.
Why should drivers always be looking for hazards?
21.
All of the following are lighting requirements for combination vehicles longer than 20 feet or wider than 80 inches except:
22.
A female housing fixed to the side or ends of a vehicle to receive a stake or peg, and may also be used as an anchor point is a:
23.
What is the best advice for drivers when a heavy fog occurs?
24.
When you are driving on a snow packed road, you should reduce your speed by:
25.
Sliding the 5th wheel will change the weight distribution almost exclusively between which sets of axles?
26.
Which of the following is considered on duty time
27.
As part of the log packing requirements:
28.
What is the 8 day / 70 hour on duty limit?
29.
What will be the ultimate limitation that prevents you from putting the trailer tandems as far to the rear of the trailer as possible?
30.
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?
31.
Most skids:
32.
Which of these could be considered off duty time?
33.
How does the weight of the vehicle affect stopping distance?
34.
A chain marked with a
4 is identified as what kind?
35.
When confronted with an aggressive driver, you should do all of the following except:
36.
Why does vehicle speed naturally increase on a downgrade?
37.
In the following picture, what are axles 2 and 3 commonly referred to as?

38.
A key principle to remember about loading cargo is to keep the load:
39.
Which of the following has the greatest affect on the gross vehicle weight?
40.
When securing a metal coil with eyes lengthwise, all of the following are steps for securement option #1 except for:
41.
Using the following numbers, what would be the final result if you moved the 5th wheel back one hole?

steer axle: 12,300 pounds
drive axles: 33,100 pounds
Weight transfer: 500 pounds per hole
42.
Coming down steep, long, downgrades will require a driver to:
43.
When entering and exiting an expressway, and also generally any time you drive, you should:
44.
How many reflective triangles are required to be kept as part of a trucks emergency equipment?
45.
Low-beam headlights generally light to a distance of:
46.
What is true about bad weather and driving conditions?
47.
You receive a scale ticket and your drive axles are 35,400 and your trailer tandems are 31,100. 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?
48.
It is safe to remove the radiator cap or any other part of the pressurized system:
49.
As part of their pre-trip cargo securement inspection, drivers should:
50.
Blocking is used to: