Ohio CDL — General Knowledge Practice Test 1

1.The X-shaped cross-buck posted at a grade crossing is a sign that directs drivers to do what?
Stop only when a gate is loweredGive way to any approaching trainProceed across without slowingSound the horn and cross at once
2.At a passive railroad crossing with no signals or gates, who is responsible for deciding when it is safe to cross?
The railroad dispatcherThe driver aloneAn automatic gateThe train's engineer
3.Which gear should you use when backing a commercial vehicle?
The highest reverse gearNeutral, letting it rollWhatever gear you were last inThe lowest reverse gear
4.At night, how can you signal your presence to a vehicle you are about to pass?
Turn off all your lights brieflyHold the high beams on the whole timeFlash your headlights from low to high and backSound a long, continuous horn blast
5.When applying for a commercial driving job, how much of your driving work history must you provide?
The past 3 yearsThe past 5 yearsOnly your most recent jobThe past 10 years
6.How do you correct a drive-wheel braking skid, where the rear wheels have locked?
Brake harder and hold the wheel straightAccelerate hard to pull out of itSet the parking brakeRelease the brakes and counter-steer as the rear comes back in line
7.You may drive a vehicle carrying hazardous materials without a hazmat endorsement only when what is true?
The load does not require placardsThe trip stays within one cityYou are driving during daylightThe cargo is sealed by the shipper
8.During the air brake check, at roughly what pressure does the governor cut out?
About 120 to 140 psiAbout 20 to 40 psiAbout 50 to 90 psiAbout 200 psi
9.In winter, what does a lack of spray from the wheels of other vehicles suggest?
Ice may have formed on the roadThe road is drying outTraffic is speeding upTheir tires are underinflated
10.How many kinds of endorsements can be added to a CDL depending on the vehicle or cargo?
SixThreeTenTwelve