Florida CDL — General Knowledge Practice Test 5

1.If a hydraulic brake pedal suddenly sinks to the floor, one thing you can try is to:
Pump the brake pedal to try to build pressureShift into a higher gear right awayShut the engine off immediately
2.Which practice best helps a commercial driver avoid fatigue behind the wheel?
Get enough sleep before driving and take rest breaksTurn up the radio and open a windowDrink coffee every hour to stay awake
3.How does a 12-ounce beer compare with a 5-ounce glass of table wine or a shot of 80-proof liquor?
The beer holds far less alcohol than the other twoThe wine is by a wide margin the weakest of the threeThe liquor is the only one of the three that raises BACAll three carry roughly the same quantity of alcohol
4.A transit coach has an interlock that applies the brakes whenever the rear door is opened. May the driver lean on it instead of the parking brake?
No, it is a passenger safety device and not a substitute for the parking brakeYes, as long as the rear door is left standing openYes, but only on ground that is levelYes, whenever the engine is left running
5.A car behind you wants to pass and, from your high seat, the road ahead looks clear. Should you wave the driver around?
Yes, if you can see at least a quarter mile of open roadYes, because your seat lets you see farther than they canYes, provided you flash your headlights firstNo, never signal another driver that passing is safe
6.Why should you speed up smoothly and gradually in a commercial vehicle?
Jerky acceleration can cause damage and, on slick roads, spin the drive wheelsFast acceleration is illegal for all trucksIt is the only way to engage reverse
7.You have to stop your commercial vehicle on the shoulder of a highway. What should you do?
Leave the vehicle in the lane with the lights offPull as far off as possible, turn on flashers, and set out warning trianglesStand behind the trailer to wave traffic around
8.Which vehicles are generally required to stop at every railroad crossing, even when no train is coming?
Buses carrying passengers and trucks hauling placarded hazardous materialsAll commercial vehicles without exceptionOnly empty flatbed trailersOnly vehicles with a single axle
9.A black-and-yellow warning sign showing a truck on a downhill grade tells a commercial driver to:
Speed up to build momentum for the next hillPrepare for a steep downgrade by selecting a low gear and safe speedStop and set the parking brake at the sign
10.Which action would violate the federal handheld-phone rule for a commercial driver?
Holding the phone to your ear to make a callUsing a hands-free earpiece with voice dialingPressing a single button to answer on a mounted deviceTalking with the phone in a cradle on speaker