South Dakota CDL — General Knowledge Practice Test 3

1.What does the manual say about taking a drug that hides fatigue?
Use it only on trips longer than 500 milesDon't use it, because rest is the only cure for fatigueUse it as long as a doctor has not objectedIt is fine as long as it is sold over the counter
2.What does the manual give as the main reason drivers exceed speed limits?
To keep the engine in its power bandTo stay ahead of tailgatersTo avoid shifting gearsTo save time
3.Just before starting the walk-around in Step 5, which turn signal does the manual have you turn on?
The left turn signalThe right turn signalNeither; turn signals are checked only in Step 6Both, by way of the four-way flashers
4.A South Dakota commercial learner's permit has expired. How long does its holder have to convert it to a CDL before having to start over?
Up to 30 days after it expires; after that, only the skills test is repeatedUp to 1 year after it expires; after that, the knowledge tests alone have to be passed a second timeUp to 180 days after it expires; after that, the knowledge and skills tests must be passed againNo time at all; an expired permit can never be converted
5.A railroad crossing has no traffic control device of any kind. Who decides whether to stop or to proceed?
The train crew, who must signal to road trafficYou do; at a passive crossing the decision rests entirely with the driverA flagger, whom the railroad must station at every crossing of this kind by lawNobody; road vehicles may always proceed without slowing
6.Besides looking smaller, how do other vehicles appear in a convex mirror?
Closer than they really areFarther away than they really areAt their true distanceWider than they really are
7.What does the manual call the best advice for driving in fog, and what does it prefer you do?
Follow closely behind another truckDon't; wait at a rest area or truck stopUse the shoulder at reduced speedSpeed up to get through it sooner
8.Besides being at least 18, what must an applicant hold to get a South Dakota commercial learner's permit?
A Class 1 or Class 2 South Dakota operator's license that is validA Class 3 South Dakota license that is validA driver license from any state that is valid, plus a medical certificateA Seasonal CDL with the W restriction
9.A chemical analysis shows a South Dakota driver was operating a CMV with an alcohol concentration of 0.05%. What does the manual say follows?
A 24-hour out-of-service order and nothing more, since it is a first offenseA 60-day disqualificationNo action, because the result is under 0.08%A commercial license disqualification of not less than one year
10.A driver has a drug and alcohol program violation recorded in the Clearinghouse. What must be completed before that driver can operate CMVs on public roads again?
The return-to-duty processA new CDL skills test with a state examinerA 24-hour out-of-service periodA TSA security threat assessment