South Carolina CDL — General Knowledge Practice Test 8

1.A round sign showing a black railroad-crossing symbol on a yellow background appears ahead of the tracks. What is it telling a commercial driver to do?
Accelerate to clear the area before any possible train arrivesCome to a full stop on every approach whether or not a train is nearSlow down, look and listen for a train, and be prepared to stop if one is approachingIgnore the crossing unless a gate has already dropped
2.At a flashing-light crossing with more than one track, what must you confirm before you cross?
That the nearest track alone is clearThat the gate is at least partly raisedThat all of the tracks are clearThat the bell has stopped, regardless of trains
3.If a tire blows out, what should you do with the brakes at first?
Pump the brakes rapidly at onceBrake as hard as possible right awayStay off the brake until the vehicle slowsApply the parking brake immediately
4.What is the purpose of the diamond-shaped hazard labels a shipper attaches near hazardous cargo?
They record the weight of the package for billingThey warn people of the hazard class of the shipmentThey show the delivery address for the freightThey mark which side of the trailer to unload first
5.Strong winds tend to cause the most lane-keeping trouble for which vehicles?
The heaviest fully loaded trucksLighter vehiclesOnly vehicles with air brakesVehicles with the most axles
6.Under the state hands-free act, what does the law say about viewing moving images such as videos or video calls while driving?
It is prohibited while drivingIt is allowed if the screen is mounted on the dashIt is permitted for navigation video onlyIt is allowed below highway speeds
7.In the stab braking method, what do you do after the wheels lock up?
Release the brakes, then reapply when the wheels roll againHold the brakes fully locked until you stopSteer sharply while keeping the wheels lockedRelease the brakes and coast without reapplying
8.What is the fine for a first offense under South Carolina's Hands-Free and Distracted Driving Act?
$25$100$50$500
9.After you stop on a two-way road that carries traffic in each direction, where should the warning devices go?
All three within 10 feet of the front bumperOne near the vehicle, and one about 100 feet ahead and behindAt 200, 300, and 500 feet behind onlyOnly a single device at the rear corner
10.South Carolina law (Code 56-5-4780) sets a minimum distance for dimming your headlights when approaching another vehicle from behind. What is that minimum?
100 feet350 feet200 feet500 feet