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IOWA CDL PRACTICE TEST - GENERAL KNOWLEDGE

31. As you approach a turn, do not coast unsafely. Unsafe coasting occurs when:
you downshift before making a turn.
your vehicle is out of gear for more than the length of your vehicle.
you downshift for less than the length of your vehicle.
32. If you must make a quick stop to avoid an accident, you should:
increase your stopping distance.
jam on the brakes to keep your vehicle in a straight line.
use controlled or stab braking.
33. If you feel drowsy while driving, you should:
stop yawning.
get some coffee.
pull off the road and get some rest.
34. Placards must be:
in a diamond shape.
readable from all 4 directions.
All of the above.
35. For fire safety, the correct list of items you should check during your pre-trip inspection is:
cargo, fuel, electrical and exhaust systems.
fuel and fire extinguisher.
tires, cargo, fuel, electrical and exhaust systems, fire extinguisher.
36. Which of the following statements about engine overheating is true?
You should never shut off an overheated engine until it cools.
Low speeds create more heat for the engine.
You should never remove the radiator cap or any part of the pressurized system until the system has cooled.
37. Which of the following is NOT a reason for hydraulic brake failure?
Loss of hydraulic pressure
Brake fade on long hills
Stab braking
38. Anti-lock brakes:
keep your brakes from locking up when you brake hard.
help you stop faster.
increase your stopping distance.
39. Stopping distance can be affected by:
Time of day
Speed
Temperature
40. When crossing or entering traffic with a heavy vehicle:
you may need a much larger gap to enter traffic than you would in a car.
you should allow more room if your vehicle is not loaded.
you can count on other drivers to move out of your way so you can safely enter the flow of traffic.
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