CDL DOUBLES PRACTICE TEST CALIFORNIA

11. If the drive wheels start to skid:
push in the clutch to let them turn freely.
use the brakes to slow down.
accelerate slightly to regain control.
12. What is the most important reason to inspect your vehicle?
Vehicle inspection is required by federal and state laws.
Saving money by preventing costly repairs.
Your safety and that of other road users.
13. Placards are:
signs put inside a vehicle used to warn others of hazardous materials.
signs placed on a vehicle to identify the hazard class of the cargo.
devices placed below a vehicle to improve traction.
14. Air storage tanks:
hold compressed air for the brakes.
use parts of the service brake systems to stop the vehicle in a brake system failure.
pump air into the air storage tanks.
15. Texting while operating a commercial motor vehicle is:
acceptable if you are contacting your supervisor.
acceptable if you are contacting your dispacther.
illegal.
16. Which of the following statements about retarders is NOT correct?
You should turn the retarder off whenever the road is wet, icy, or snow covered.
Retarders help you avoid skids.
Retarders help slow a vehicle, reducing the need for using brakes.
17. Front-end header boards:
protect drivers from spilled cargo.
should never be used.
protect drivers from cargo in case of an accident or emergency stop.
18. You are driving a double. Before entering traffic, you should:
turn on your headlights.
make sure you have a large enough gap before entering or crossing traffic.
assume there is enough room to merge into traffic.
19. If your brakes fail on a steep mountain downgrade, you should:
use an escape ramp if it is available.
go right if the shoulder is clear.
leave the road immediately.
20. Air brakes:
are an effective way to stop large and heavy vehicles.
should be used only when driving on wet roads.
are prohibited on larger vehicles.
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