Correct answer: B – False
Liquids or gases must not be carried in a leaking tank. Before loading, unloading, or driving a tank vehicle, check under and around it for signs of leakage. Inspect the tank body, valves, pipes, connections, hoses, covers, and vents, and do not continue with a tank that cannot safely contain its cargo.
Source: New Jersey Commercial Driver’s License Manual — § 8.1.1, “Leaks”
Correct answer: A – The heavier the vehicle, the more work the brakes must do and the more heat they absorb
A heavier vehicle requires its brakes to perform more work and absorb more heat when stopping. Excessive heat from overusing the brakes can cause brake fade or failure. On a long or steep downgrade, select the proper low gear and use the engine’s braking effect as the principal means of controlling speed.
Source: New Jersey Commercial Driver’s License Manual — §§ 2.6.1 and 2.16.3, “Stopping Distance” and “Brake Fading or Failure”
Correct answer: A – It shows a wider viewing area
Convex mirrors show a wider area than flat mirrors, helping the driver monitor more space beside and behind a large vehicle. However, objects appear smaller and farther away than they actually are. Drivers must account for this distortion when judging another vehicle’s position or distance.
Source: New Jersey Commercial Driver’s License Manual — § 2.4.2, “How to Use Mirrors”
Correct answer: A – A load that does not require placards
A driver without a hazardous-materials endorsement may operate a vehicle carrying hazardous materials when the shipment does not require placards, provided the driver otherwise holds the proper license. If the vehicle must be placarded, the driver must have the hazardous-materials endorsement. Vehicle weight, intrastate travel, or an endorsed passenger does not substitute for the driver’s endorsement.
Source: New Jersey Commercial Driver’s License Manual — § 2.23.3, “Lists of Regulated Products”
Correct answer: C – 9
Hazardous materials are organized into nine numbered classes. They cover explosives, gases, flammable liquids, flammable solids, oxidizers and organic peroxides, poisonous and infectious materials, radioactive materials, corrosives, and miscellaneous hazardous materials. Some classes are further divided into separate divisions.
Source: New Jersey Commercial Driver’s License Manual — § 9.3.1, “Definitions”, 49 CFR § 173.2 — Hazardous material classes and index to hazard class definitions
Correct answer: B – To permit less maximum axle weight when axles are closer together
A bridge formula limits allowable weight according to axle spacing. It permits less maximum axle weight when axles are closer together, helping prevent excessive concentrated loading on bridges and roadways. It is not a formula for calculating the manufacturer’s gross vehicle weight rating.
Source: New Jersey Commercial Driver’s License Manual — § 3.2.2, “Legal Weight Limits”
