# 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
Perfect for first-time, renewal applicants
DC CDL General Knowledge Test format:
50 questions
80% passing score
List of questions
1.
When driving at more than 40 mph, what is the safe minimum following distance for ideal daytime conditions?
2.
Which statement is true?
3.
What is the aggregate WLL of two indirect tiedowns with a WLL of 5,000 lbs, and one tiedown with a WLL of 6,000 lbs?
4.
After taking 10 consecutive hours off duty, a driver begins to work at 8:00 a.m. The driver may operate a commercial motor vehicle until what time?
5.
Who is responsible for ensuring that the vehicles, anchor points and other securement components are in good working order?
6.
Commercial drivers are allowed to hold CDL's in how many states at the same time?
7.
The aggregate WLL for logs loaded lengthwise must be at least:
8.
On what day and time does an 11 hour rule violation occur?
Day 1

Day 2
9.
Option #3 for securing metal coils transported with eyes lengthwise includes all of the following EXCEPT:
10.
What is the minimum weight of a load of metal coils that requires specific securement practices?
11.
Service brake stopping action should be tested at:
12.
Which statement below is true?
13.
What is the minimum Working Load Limit for the entire securement system?
14.
You are starting your vehicle in motion from a stop. As you apply power to the drive wheels, they start to spin. You should:
15.
The responsibility for repairing items noted on the pre-trip report that affect safety belongs to:
16.
When is it acceptable to use amphetamines to help you stay awake while driving?
17.
If you are driving while sleepy, the safest remedy is:
18.
The 14 hour limit can be extended by:
19.
Which of these is true about the use of drugs while driving?
20.
Circumstances that would make wheels and rims unsafe include the following except:
21.
All of the following should be part of the engine compartment check, EXCEPT:
22.
Securing heavy vehicles or equipment with crawler tracks or wheel requires a minimum of how many tiedowns?
23.
Which of these statements about downshifting is true?
24.
When securing a non-cubic boulder with an unstable base, the four surrounding chains must have a WLL of at least:
25.
"Fully Contained" means:
26.
Extra care is needed to keep your vehicle centered in your lane because commercial vehicles:
27.
Aggregate Working Load Limit is defined as:
28.
The road you are driving on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation?
29.
The best way to keep brakes from getting too hot while going down long grades is to:
30.
A chock is generally used to secure:
31.
Which of these would NOT help if windshield is covered with ice?
32.
If you slide the 5th wheel toward the nose of the tractor, what will be the effect?
33.
Combination vehicles must display license plates:
34.
What are the two primary laws governing the placement of the tandems?
35.
Merging to the road is safest if you:
36.
Which statement below accurately describes the 11 hour driving limit?
37.
If you have a heavy load that is slowing you down on an upgrade you should:
38.
Which of these statements about engine overheating is true?
39.
When driving with ABS, remember:
40.
A good inspection habit is for the driver to re-inspect the cargo:
41.
A major safety concern of a broken or faulty exhaust system is:
42.
Some causes of fuel fires include improper fueling, driver smoking, and:
43.
Convex (curved) mirrors:
44.
"You do not have a hazardous materials endorsement on your commercials driver’s license. You are asked to deliver hazardous materials in a placarded vehicle. You should:"
45.
A Class A CDL is required to drive a combination vehicle of over 26,001 lbs towing a vehicle weighing:
46.
What is Gross Vehicle Weight Rating?
47.
When driving downhill, you should use the service brakes:
48.
Specifically prohibited in the testing area are cellphones and:
49.
When securing paper rolls with eyes crosswise, which of the following can be used to prevent side-to-side shifting when there is more than 8 inches of space to the wall?
50.
When securing concrete bell pipe in multiple complete tiers, all of the following are true, EXCEPT: