South Dakota CDL — General Knowledge Practice Test 8

21.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

22.A covered farm vehicle has a gross vehicle weight rating above 26,001 pounds. Where may it use the CDL exemption?

In its home state, plus out-of-state trips no farther than 150 air miles from the farmAnywhere in the United States, the same as lighter covered farm vehiclesOnly inside a 150 air-mile radius of the farm or ranch, and never across any state lineOnly on county and township roads in the state where it is registered

23.In stab braking, when do you put the brakes fully back on after releasing them?

As soon as the wheels start rolling againImmediately, before the wheels rollAfter a slow count of fiveOnly once the vehicle has stopped

24.The manual names three ways a driver can violate the federal drug and alcohol program rules. Which set is it?

Testing positive, missing a medical exam, or turning in a late logbookTesting positive, actual knowledge that the driver used, or a refusal to be testedRefusing to be tested, letting a medical card expire, or a moving violationActual knowledge of use, an at-fault crash, or a failed skills test

25.Why can a road shoulder usually serve as an escape route for a large vehicle?

Shoulders are always pavedMost shoulders can support a large vehicleThe law reserves shoulders for trucksShoulders give more traction than pavement

26.During the walk-around inspection, what does the manual say to check about license plates at the rear of the vehicle?

That they are covered to keep off road sprayThat they are mounted on the cargo doorsThat the plate number matches the trailer's serial numberThat they are present, clean, and secured

27.In Step 4 of the seven-step inspection, which lights do you switch on before getting out of the vehicle?

The high beams and the left turn signalThe parking lights onlyThe low-beam headlights and the four-way emergency flashersThe stop lights and the backup lights, with a helper on the pedal

28.On the walk-around inspection, what colors should side-marker lights and side-marker reflectors be?

Amber at the rear and red elsewhereWhite at every positionRed at every positionRed at the rear and amber elsewhere

29.What do wet roads do to stopping distance, according to the manual?

They can double itThey add about 10 percentThey triple it at any speedThey have no effect when the tires are new

30.Which gear does the manual say to use when backing, and why?

The lowest reverse gear, so you can correct errors and stop quicklyThe highest reverse gear, to finish the maneuver quicklyNeutral, letting the vehicle coast back on a grade while you watch the mirrorsAny forward gear with the clutch slipping