Illinois CDL — General Knowledge Practice Test 5

1.When getting ready for winter driving, what should you add to the windshield washer system?
Plain tap waterWindshield washer antifreezeEngine oilDiesel fuel
2.What does a round, black-on-yellow sign placed ahead of a railroad crossing mean?
A rest area is aheadA railroad crossing is ahead — prepare to stopA weigh station is aheadA steep downgrade is ahead
3.What is the best overall advice about driving in fog?
Avoid driving in it if possible, and slow before enteringMaintain highway speed to get through it fastFollow closely behind another vehicle's lightsUse only high beams
4.What speed should you observe when approaching and driving through a roadway work zone?
The posted work-zone speed limit at all timesThe normal highway limit until you reach workersAny speed that keeps traffic flowingTen mph over the posted limit
5.Why does an empty truck often need a longer stopping distance than a loaded one?
Empty trucks always have weaker brakesAn empty vehicle has less tractionThe engine produces more power when emptyEmpty trucks are required to travel faster
6.Which vehicle requires a Class B commercial driver's license?
A tractor pulling a 40,000-pound trailerA passenger car towing a small utility trailerA single straight truck rated at 30,000 poundsA pickup rated at 9,000 pounds
7.On a one-way or divided highway, where should the three warning devices be placed after you stop?
10, 50, and 150 feet toward trafficAll three at 100 feet behind the vehicle25, 100, and 300 feet toward traffic10, 100, and 200 feet toward traffic
8.One of the three rules for using turn signals is to signal early. What does that accomplish?
It lets you skip checking mirrorsIt saves electrical powerIt cancels the signal automaticallyIt helps keep others from trying to pass you
9.At a crossing with multiple tracks that requires you to stop, where should you stop?
Between the two sets of tracksBefore the first set of tracksAfter the last set of tracksDirectly on the first set of tracks
10.How should fatigue be treated compared with alcohol impairment behind the wheel?
As a minor issue that coffee solvesAs unimportant during daytime onlyAs a serious impairment that raises crash riskAs something that improves with speed