CDL - General Knowledge, Combinations, Air Brakes
Exam:100% Expert Verified Study Guide Real Testing
2026|2027 Questions Detailed Answers and Instructor
Note for A+ Guaranteed Pass
Enough engine oil level - Answers -What keeps an engine cool in hot weather driving?
Should be performed after every break you take while driving - Answers -Cargo inspection:
Poor traction - Answers -A vehicle is loaded with very little weight on the drive axle. What may
happen?
Park in an open area - Answers -If your vehicle catches fire while you are driving, you should:
If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet the reflective
triangle should be moved back to give adequate warning - Answers -Which of these statements
about marking a stopped vehicle is true?
Generally are used when freight is carried part way by rail or ship - Answers -Containerized
loads:
1|Page
,You can check the coolant level of a hot engine - Answers -When a coolant container is part of a
pressurized system which of these is true?
While the vehicle is parked - Answers -When should you test your parking brakes?
To use the braking effect of the engine - Answers -When going down a long steep downgrade
you should always:
Squeezing on the brakes firmly without locking them up. - Answers -Controlled braking is:
Brake adjustment - Answers -Which of these is not a brake check you normally do during you
walk-around inspection
Labels - Answers -One can recognize hazardous materials by looking on the container:
Robotic - Answers -Which of these is not a type of retarder?
Gross combination Weight - Answers -The total weight of a powered unit, the trailer and the
cargo is called?
2|Page
,Below the posted speed - Answers -Freeway exits can be dangerous for commercial vehicles, at
what speed should you enter the exit?
Many heavy vehicle accidents occur between midnight and 6am - Answers -Which of these
statements is true?
front of - Answers -Space to the ___ your vehicle is most important to manage.
Trailer jack-knife - Answers -Your brakes can get wet when driving through heavy rain. What can
happen if the brakes are applied?
Axles' mounts should be checked at each point where they are secured on the vehicle frame
and axles - Answers -Which of the statements about an inspection of the suspension
components is true?
Brake shoes should not have oil, grease, or brake fluid on them. - Answers -You are checking
your brakes and suspension system for a pre-trip inspection. Which of these statements is true?
3|Page
, The vehicle does not require placards - Answers -You do not have hazardous materials
endorsement in your commercial driver license. You can drive a vehicle hauling hazardous
materials when:
1 year - Answers -If you are convicted of driving a commercial vehicle under the influence of
alcohol or drugs, you will lose your CDL for:
All hazardous materials present health and safety danger - Answers -Which of these is true
about hazardous materials:
Any detectable amount - Answers -You will be placed out of service for 24 hours if your BAC is at
least
Responding to a hazard by slowing the vehicle. - Answers -What does emergency braking mean?
You can pull forward when you leave - Answers -You should try to park so that:
Total weight of a single vehicle plus its load - Answers -Gross Vehicle Weight means the
following:
4|Page
Exam:100% Expert Verified Study Guide Real Testing
2026|2027 Questions Detailed Answers and Instructor
Note for A+ Guaranteed Pass
Enough engine oil level - Answers -What keeps an engine cool in hot weather driving?
Should be performed after every break you take while driving - Answers -Cargo inspection:
Poor traction - Answers -A vehicle is loaded with very little weight on the drive axle. What may
happen?
Park in an open area - Answers -If your vehicle catches fire while you are driving, you should:
If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet the reflective
triangle should be moved back to give adequate warning - Answers -Which of these statements
about marking a stopped vehicle is true?
Generally are used when freight is carried part way by rail or ship - Answers -Containerized
loads:
1|Page
,You can check the coolant level of a hot engine - Answers -When a coolant container is part of a
pressurized system which of these is true?
While the vehicle is parked - Answers -When should you test your parking brakes?
To use the braking effect of the engine - Answers -When going down a long steep downgrade
you should always:
Squeezing on the brakes firmly without locking them up. - Answers -Controlled braking is:
Brake adjustment - Answers -Which of these is not a brake check you normally do during you
walk-around inspection
Labels - Answers -One can recognize hazardous materials by looking on the container:
Robotic - Answers -Which of these is not a type of retarder?
Gross combination Weight - Answers -The total weight of a powered unit, the trailer and the
cargo is called?
2|Page
,Below the posted speed - Answers -Freeway exits can be dangerous for commercial vehicles, at
what speed should you enter the exit?
Many heavy vehicle accidents occur between midnight and 6am - Answers -Which of these
statements is true?
front of - Answers -Space to the ___ your vehicle is most important to manage.
Trailer jack-knife - Answers -Your brakes can get wet when driving through heavy rain. What can
happen if the brakes are applied?
Axles' mounts should be checked at each point where they are secured on the vehicle frame
and axles - Answers -Which of the statements about an inspection of the suspension
components is true?
Brake shoes should not have oil, grease, or brake fluid on them. - Answers -You are checking
your brakes and suspension system for a pre-trip inspection. Which of these statements is true?
3|Page
, The vehicle does not require placards - Answers -You do not have hazardous materials
endorsement in your commercial driver license. You can drive a vehicle hauling hazardous
materials when:
1 year - Answers -If you are convicted of driving a commercial vehicle under the influence of
alcohol or drugs, you will lose your CDL for:
All hazardous materials present health and safety danger - Answers -Which of these is true
about hazardous materials:
Any detectable amount - Answers -You will be placed out of service for 24 hours if your BAC is at
least
Responding to a hazard by slowing the vehicle. - Answers -What does emergency braking mean?
You can pull forward when you leave - Answers -You should try to park so that:
Total weight of a single vehicle plus its load - Answers -Gross Vehicle Weight means the
following:
4|Page
