New Jersey CDL Permit Test - Knowledge Test Class B

You must be at least 18 years old to obtain a CDL. However, you must be 21 years old to drive in interstate commerce or to obtain a passenger or hazardous materials endorsement.

A driver should inspect wheels before a drive, specifically looking for damage on the wheels and rims. Wheels or rims that have had welding repairs are not safe for use.

The right lanes of a roadway are generally intended for vehicles traveling more slowly than surrounding traffic. If being slowed down by a heavy load, you should stay in the right lane.

The method of controlled braking involves applying the brakes as hard as you can without locking the wheels. If you need to make large steering adjustments while using controlled braking, you should remove your foot from the brake pedal, steer, then reapply the brakes.

An air compressor governor will stop the compressor from pumping air once the air tanks are at an air pressure level of 125 psi. This air pressure level is referred to as the "cut-out" level.

Possible causes of vehicle fires include spilled fuel or improper use of flares following an crash; under-inflated tires or dual tires that touch; short circuits in the electrical system; smoking around fuel; improper fueling or loose fuel connections; and carrying cargo that is flammable, improperly sealed or loaded, or poorly ventilated.

The weight of cargo in a vehicle needs to be balanced appropriately so that it does not interfere with the vehicle's safe handling. For example, if cargo is placed too far to the rear of a vehicle, the front axle will be under-weighted and the front wheels may not have enough traction for the driver to steer safely.