» Iowa Doubles Triples 3 » Page 2 of 2

IA CDL DOUBLES TRIPLES PRACTICE TEST

11. Which of these describes the proper braking technique when driving on a long and steep downgrade?
Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
12. Empty trucks:
require shorter stopping distances than fully-loaded trucks.
may have poor traction.
have better traction than fully-loaded trucks.
13. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
red.
blue.
yellow.
14. With an engine fire, you should NOT:
turn the engine off as soon as possible.
shoot foam from the vehicle’s underside.
open the hood.
15. Emergency brakes must be held on by:
air pressure.
hydraulic pressure.
mechanical force.
16. You are more at risk of being fatigued:
when driving alone.
after getting more than 8 hours of sleep.
when stopping periodically during long trips.
17. To know how much space you should keep in front of you:
estimate how many vehicle lengths there are between you and the vehicle ahead.
estimate how many seconds it would take you to reach the vehicle ahead.
wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
18. You should flash your brake lights to warn drivers behind you when:
you see a hazard that will require slowing down.
you see a bus stops in the roadway ahead to unload passengers.
All of the above.
19. If there is a fire in your vehicle, do NOT:
pull into a service station.
park in an open area.
notify emergency services.
20. When driving a double or triple, you should:
drive in the left lane whenever possible.
decrease your following distance.
increase your following distance.
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More