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CDL DOUBLES PRACTICE TEST COLORADO

11. If the safety relief valve in the air brake system releases air:
this will supply more power to the drive wheels.
this will supply more power to the brakes.
something is wrong.
the valve is fully operational.
12. How does ABS help you?
ABS always shortens your stopping distance.
ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces.
ABS makes stab braking more effective.
ABS replaces your normal brakes and helps you  to stop faster.
13. If driving a heavy vehicle, you should:
stay in the left lane.
try to pass other vehicles going uphill.
avoid braking.
stay in the right lane.
14. The space under a heavily loaded vehicle can be very small. This can cause problems:
on unpaved yards.
on dirt roads.
when crossing railroad tracks.
All of the above.
15. To use the controlled braking method in an emergency, you should:
apply your brakes all the way, and release the brakes when the wheels lock up.
apply the brakes when the wheels lock up.
pump the brake pedal 3 times.
apply the brakes as hard as you can without locking the wheels.
16. Tire load is defined as:
the minimum tire pressure.
the minimum safe weight a tire can carry at a specified pressure.
the maximum safe weight a tire can carry at a specified pressure.
the weight transmitted to the ground by 1 tire.
17. Rims with welding repairs:
can be used for tires in the rear of the vehicle.
can be used for tires in the front of the vehicle.
are acceptable only when carrying a heavy load.
are not safe.
18. When should you downshift automatic transmissions?
Watch your tachometer, and downshift when your engine reaches the top of the range.
When going down steep grades.
When you start to get drowsy.
When you want to go faster.
19. Air brakes:
are an effective way to stop large and heavy vehicles.
can improve fuel efficiency.
are prohibited on larger vehicles.
should be used only when driving on wet roads.
20. With low beams, drivers can see ahead about:
250 feet
15 feet
150 feet
100 feet
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