WI CDL DOUBLES TRIPLES PRACTICE TEST

11. Air pressure should build up in a single air system, within about:
1 minute.
15 minutes.
10 minutes.
3 minutes.
12. Why should you cover your cargo?
Because spill protection is a safety requirement in many states.
To protect people from spilled cargo.
To protect the cargo from weather.
All of the above.
13. It is safer to drive over (rather than to avoid) which of the following?
Plastic containers
Paper and cloth sacks
Cardboard boxes
None of the above.
14. Warnings on low bridges or underpasses:
are always posted.
are often posted, but sometimes they are not.
must be posted.
None of the above.
15. Doubles:
are less likely to rollover than straight trucks.
are easier to drive than straight trucks.
require more reaction time than straight trucks.
None of the above.
16. Hanging meat in a refrigerated truck can be:
a very stable load if properly distributed.
a very stable load with a low center of gravity.
a very unstable load with a low center of gravity.
a very unstable load with a high center of gravity.
17. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
50 miles
two hours
20 miles
25 miles
18. Overloading a vehicle with cargo can have negative effects on all of the following except:
Steering
Braking
Weight limits
Speed control
19. Retarders:
apply their braking power whenever you push on the accelerator.
help slow a vehicle and reduce brake wear.
help prevent accidents by applying extra braking power to the non-drive wheels.
All of the above.
20. 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.
All of the above.
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