CDL PRACTICE TEST - GENERAL KNOWLEDGE (LOUISIANA)
21.
Which of the following statements about drugs is true?
|
Use of drugs can lead to traffic accidents.
|
|
|
Some "controlled substances" are allowed to reduce fatigue.
|
|
|
Possession and use of a drug given to a driver by a doctor is never permitted.
|
|
|
All over-the-counter drugs are safe to use while on duty.
|
22.
You should avoid driving through flowing water of deep puddles if possible. If not, you should:
|
wait until the engine has cooled before crossing the water.
|
|
|
press the accelerator and increase the engine and gear speed to the rpm required by road conditions.
|
|
|
set out reflective triangles to warn other traffic.
|
|
|
gently apply the brakes, increase engine rpm and cross the water while keeping light pressure on the brakes.
|
23.
If a trailer does not have spring brakes, to keep the trailer from moving you should:
|
close the brake valve.
|
|
|
use the service brakes.
|
|
|
park on a slight decline.
|
|
|
use wheel chocks.
|
24.
To prevent your vehicle from rolling back when you start you should:
|
partly take your right foot off the brake before you engage the clutch.
|
|
|
partly engage the clutch before you take your right foot off the brake.
|
|
|
release the parking brake, then apply enough engine power to keep from rolling back.
|
|
|
put the transmission in Neutral.
|
25.
Drivers should watch out for black ice when the temperature is ______ freezing and the road looks ______.
|
above; wet
|
|
|
above; dry
|
|
|
below; wet
|
|
|
below; dry
|
26.
Which of these statements is correct?
|
Loose cargo that falls off a vehicle can cause traffic problems.
|
|
|
Loose cargo can hurt the driver during a quick stop.
|
|
|
Others could be hurt or killed by cargo that falls off a vehicle.
|
|
|
All of the above.
|
27.
When a tire fails, you must:
|
stay off the brake.
|
|
|
hold the steering wheel firmly.
|
|
|
get out and check all the tires after you have come to a stop.
|
|
|
All of the above.
|
28.
Air storage tanks:
|
use parts of the service brake systems to stop the vehicle in a brake system failure.
|
|
|
pump air into the air storage tanks.
|
|
|
hold compressed air for the brakes.
|
|
|
are installed in the first tank the air compressor pumps air to.
|
29.
How do you put on the parking brake on newer vehicles?
|
By pulling out a diamond-shaped yellow knob.
|
|
|
By move a yellow lever to the left.
|
|
|
By using a round yellow knob.
|
|
|
By pushing in Push in a diamond-shaped yellow knob.
|
30.
If your vehicle is hydroplaning, you should:
|
accelerate to get through the water as quickly as possible.
|
|
|
release the accelerator and push in the clutch.
|
|
|
use the brakes to slow down.
|
|
|
None of the above.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More