Knowledge Test Class A #2
Class A Driving Test | District Of Columbia 2026 #2 Page 3 of 7
Train for FREE online with our District Of Columbia class A license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a DC CDL class A permit in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class A requirements may vary from state to state.
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15 . After a tire has been changed, the driver should stop after a short distance to:
See if rocks have gotten into the tread.
After a tire has been changed, you should stop a short while later to re-check the tightness of the lug nuts.
16 . While driving:
A driver should always use turn signals to inform others of their intentions.
It is essential that a driver always uses proper signals to make their intentions known to others on the road.
17 . Air brakes are:
A tool to improve fuel efficiency.
As long as the brakes are properly maintained, using air brakes is a safe and effective method of stopping large, heavy vehicles.
18 . Belts in the engine compartment should be:
Easy to slide off.
When inspecting your vehicle's engine, check the belts for tightness and excessive wear. The amount of "give" that is safe for each belt in a given engine will vary, so learn what is appropriate for your vehicle.
19 . To ensure you do not interfere with traffic while driving a heavy vehicle, you should:
Ride the brakes while driving downhill.
If the weight of your vehicle prevents you from matching the speed of surrounding traffic, you should stay in the right lane, if possible.
20 . When driving, keeping space between your vehicle and other vehicles is:
Optional.
For the safety of everyone on the road, it is essential that you maintain adequate cushions of space between your vehicle and other vehicles. This will help ensure that if you need to stop your vehicle, you will be able to do so without hitting someone else.
21 . How many daily hours of sleep does an adult need to maintain alertness?
Four to five
