Pennsylvania CDL — General Knowledge Practice Test 8

1.What factors determine a person's blood alcohol concentration?
Only the type of alcohol consumedThe temperature of the drinkThe amount, how fast you drink, and your weightYour height and eye color
2.When you are approaching or passing a bicyclist, what should you do first?
Sound your horn to move the cyclist overSpeed up to pass as quickly as possibleMove as far left as the lane allows and hold your speedSlow down to a safe speed
3.What is 'black ice'?
Ice mixed with road saltA thick layer of dark, opaque iceA thin, clear layer of ice that makes the road look wetIce that forms only inside tunnels
4.When must a commercial driver wear a safety belt?
Only on highways above 45 mphAt all times while operating the vehicleOnly when carrying passengersOnly during the vehicle inspection test
5.What is one danger of traveling alongside another vehicle in an adjacent lane?
Your fuel economy decreasesYour mirrors adjust automaticallyYour brakes overheat more quicklyThe other driver may turn into you, or you may get trapped
6.About how much alcohol can the liver process in one hour?
A full ounceTwo ouncesThe alcohol in three drinksAbout one-third of an ounce
7.A Class B CDL is required to operate which of the following?
A combination towing a 40,000-pound trailerA passenger car with a small utility trailerA single vehicle over 26,001 lbs GVWR, or towing under 10,000 lbsOnly vehicles carrying hazardous materials
8.What is the consequence of having any measurable alcohol under 0.04 percent while operating a CMV?
Nothing, since it is below the legal limitYour CDL is revoked for lifeYou are placed out of service for 24 hoursYou are fined but may keep driving
9.When the red lights at a railroad crossing start flashing, what are you required to do?
Speed up to beat the train across the tracksStop and yield to the approaching trainKeep going if you cannot see a train yetSound your horn and roll through slowly
10.What is 'off-tracking' when a long vehicle turns a corner?
The rear wheels track a tighter, different path from the front onesThe trailer brakes lock during a turnThe vehicle drifts backward on a hillThe tires lose air pressure in a curve