Florida CDL — General Knowledge Practice Test 4

1.What happens to the following-distance rule when you drive faster than 40 mph?
You can cut the distance in halfThe rule no longer applies at allYou add one more second to the total
2.Why should a commercial driver avoid shifting gears while crossing railroad tracks?
Shifting on the tracks wastes fuelThe vehicle could stall on the tracks if it slips out of gearIt is against railroad company policy
3.Which sequence of lights should a school bus driver use when arriving at and stopping for a student pick-up?
Red lights on the approach, then amber once the door opensHazard flashers on the approach and nothing after thatAlternating amber lights well before the stop, then alternating red lights with the stop arm outHeadlights flashed twice, followed by the amber lights
4.Objects seen in a convex ('spot') mirror on a truck appear:
Larger and closer than they really areSmaller and farther away than they really areExactly their true size and distance
5.On a truck with a manual transmission, double-clutching is used to:
Shift smoothly by matching engine speed to road speed between gearsStop the vehicle faster in an emergencySkip the need to use the acceleratorLock the drive wheels on a downgrade
6.A railroad crossing is posted with a sign reading 'Exempt.' For a driver who would normally have to stop at every crossing, this means:
No full stop is required, but you still slow down and check the tracks carefullyThe crossing may be taken at normal highway speedOnly empty vehicles are allowed to use the crossingYou must stop twice, once for each direction of track
7.You are about to slow down where drivers behind may not expect it. How can you warn them?
Tap the brake pedal to flash your brake lights and use flashers if neededSpeed up so no one catches youTurn your headlights off and on
8.Which statement about ABS is TRUE?
ABS lets you safely follow other vehicles more closelyABS always stops you in a much shorter distanceABS does not let you drive faster or follow more closely
9.A front tire blows out at highway speed. What should you do first?
Brake hard immediately to stopHold the wheel firmly, stay off the brake, and let the vehicle slowSteer sharply toward the shoulder at once
10.With the engine running during an inspection, which gauge reading should concern a commercial driver?
Oil pressure that does not come up to a normal level within secondsA fuel gauge showing a full tankAn air gauge that reaches normal operating pressureA temperature gauge that stays in the normal range