Alabama CDL Knowledge Test Class A: Practice Test
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When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:
Keeping your lights off.
Turning your lights on.
Driving on the shoulder.
Waving an arm out the window.
When a tire goes flat, you may hear a loud bang. The truck will be affected:
Immediately.
After a short delay.
Only if the damaged tire is near the front of the truck.
Only if the truck is hauling a load.
Regrooved tires:
Should not be used on any vehicle.
Should not be used on the front of a bus.
Should not be used on trucks hauling gravel.
If coolant has to be added to a system without a recovery tank, you should:
Keep the vehicle running while adding coolant.
Open the radiator cap quickly.
Not use gloves to touch the radiator cap.
Wait for the engine to cool before adding coolant.
Multi-speed axles and auxiliary transmissions are used:
To make a vehicle run more smoothly.
To provide extra gears.
To get improved gas mileage.
To make a vehicle less noisy.
Which of the following is true?
It is safe to drive on a tire that is missing one or two lug nuts.
A cracked lock ring on a rim is safe if you are not driving faster than 55 mph.
A missing clamp on a rim is dangerous and should be corrected.
When encountering a railroad crossing during the driving test, you should:
Pass another vehicle on the tracks if the other vehicle is moving too slowly.
Change lanes while on the tracks.
Not change gears while on the tracks.
What is another name for front-end header boards?
Headache racks
Cargo stoppers
Head braces
Ballasts
A ____ allows a driver to gradually apply spring brakes.
Modulating control valve
Trailer air supply control
Relay valve
A truck should be parked:
So that it must be backed up to leave the space.
So that it can be pulled forward to leave the space.
On the grass.
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