New Jersey CDL — General Knowledge Practice Test 7

1.During a walk-around inspection, why should you check the leaf springs on the suspension?
Missing one-fourth or more of the leaves puts it out of serviceMissing leaves improve the ride qualitySprings never affect safetyOnly the color of the springs matters
2.Why are rental-truck drivers a hazard worth watching carefully?
They always drive faster than trucksThey are required to yield to all carsThey cannot legally change lanesThey are frequently unaccustomed to how little the truck lets them see
3.Why should you hold the warning triangles between yourself and oncoming traffic while placing them?
To keep the triangle from blowing awayTo reflect your headlights back at youBecause the law requires carrying them that waySo oncoming drivers can see you and you stay safer
4.What is the result of having any measurable alcohol under .04% in your system while operating a CMV?
Nothing happens below .04%You are placed out of service for 24 hoursYou lose your CDL for one yearYou receive only a written warning
5.What is the minimum tread depth required in every major groove on the front tires of a commercial vehicle?
4/32 inch2/32 inch1/32 inch8/32 inch
6.After a tire failure, why should you stay off the brake until the vehicle slows down?
The brakes will overheat instantlyBraking then could cause loss of controlIt saves fuel to coastBrakes never work after a blowout
7.What can wet brakes cause after driving through heavy rain or deep standing water?
Stronger, more even brakingWeak or uneven braking and possible pulling to one sideFaster stopping distancesNo change in braking at all
8.How many placards must a placarded hazardous-materials vehicle display, and where?
Two placards, one front and one rearOne placard on the driver's door onlyThree placards spaced along the trailerFour identical placards on the front, rear, and both sides
9.How long is the CDL lost for a first offense of operating a CMV under alcohol's influence?
At least 30 daysAt least 90 daysAt least one yearOnly until a fine is paid
10.In a cargo fire inside a van or box trailer, why should you keep the doors shut?
To keep the smoke inside for laterThe doors are only decorativeOpening them supplies oxygen and makes the fire burn fasterOpening them puts the fire out instantly