CDL PRACTICE TEST - GENERAL KNOWLEDGE (PENNSYLVANIA)

21. Interstate commerce means trade, traffic, or transportation in the U.S. that is between:
Two places in the state as part of trade, traffic, or transportation originating or terminating outside the state or U.S.
A place in a state and a place outside such state or outside the U.S.
Two places in the state through another state or a place outside of the U.S.
All of the above.
22. When driving in very hot weather, you may have to:
decrease your following distance.
increase your speed until the tires cool off.
watch out for black ice.
reduce your speed to prevent overheating.
23. Distracted driving may be caused by _________ while driving.
adjusting the radio
using your smartphone
reading billboards
All of the above.
24. To maintain alertness while driving, you should:
rely on caffeine.
keep the cab warm.
take periodic breaks – about every 250 miles.
protect yourself from glare with sunglasses.
25. Placards must be placed:
on the driver's side of the vehicle.
on the front only.
on the rear only.
on the front, rear and both sides of the vehicle.
26. If you must make a quick stop to avoid an accident, you should:
use controlled or stab braking.
jam on the brakes to keep your vehicle in a straight line.
increase your stopping distance.
downshift.
27. If a load is 50 feet long, the minimum number of tie-downs required is:
4
3
5
10
28. Strong winds can make it difficult to stay in your lane especially when driving:
heavier vehicles.
lighter vehicles.
flatbed trailers.
vehicles with ABS.
29. Federal, state, and local regulations for commercial vehicles:
only apply to CMV's operated in interstate commerce.
vary from place to place.
only apply to US residents.
do not apply to CMV's operated in intrastate commerce.
30. If your drive wheels begin to spin, you should:
use the Anti-lock Braking System.
pump the brake pedal three times.
take your foot off the accelerator.
use the parking brake.
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