Tennessee CDL — General Knowledge Practice Test 8

1.A four-digit identification number shown on an orange panel or placard is used mainly by whom?
Weigh-station clerks, to record axle weightToll operators, to set the crossing feeDispatchers, to schedule the next loadFirst responders, to identify the material involved
2.What is the minimum tread depth required on the front (steering) tires of a commercial vehicle?
2/32 inch6/32 inch4/32 inch8/32 inch
3.When the red lights at a railroad crossing begin flashing, what must a commercial driver do?
Proceed quickly across before the train reaches the crossingContinue at the same speed if no gate has dropped yetTreat the lights as a caution and roll through slowlyStop, because a train is coming, and yield to it
4.Besides talking or dialing restrictions, what are motor carriers prohibited from doing regarding hand-held phones?
Letting drivers call dispatch from a rest stopInstalling hands-free equipment in the cabProviding drivers with a company phoneRequiring or allowing drivers to use a hand-held phone while driving
5.A sign mounted just below a crossbuck reading '2 TRACKS' tells the driver what?
The crossing is limited to vehicles under two tonsThere are two railroad tracks to cross at that locationA train will arrive within two minutesTwo lanes must merge before the tracks
6.On a manual-transmission vehicle, how can you keep from rolling back when starting on a hill?
Rev the engine to maximum firstCoast backward until traction returnsShift straight into the highest gearPartly engage the clutch before taking your foot off the brake
7.A vehicle designed to carry how many people, including the driver, requires a CDL regardless of weight?
8 or more12 or more24 or more16 or more
8.When your speed goes from 20 up to 40 mph, what happens to braking distance?
It stays the sameIt doublesIt becomes about ten times longerIt becomes about four times longer
9.With an engine fire, what should you avoid doing?
Turning off the engineNotifying emergency servicesOpening the hoodPulling off the road
10.Roughly how far can you see ahead with low-beam headlights at night?
About 250 feetAbout 100 feetAbout 700 feetAbout one mile