CDL Permit Written Test with Verified Solutions What is the most important reason for doing a vehicle inspection Correct Answer-To ensure the vehicle is safe to drive and roadworthy. What things should you check during a trip Correct Answer-Tires, brakes, lights, connections to trailer, trailer coupling devices, cargo securement devices(tarps, canvass, or straps) Name some key steering system parts Correct Answer-Steering wheel, steering shaft, gear box, hydraulic fluid reservoir, pitman arm, drag link, steering knuckle, spindle, power steering cylinder, steering arm, tie rod Name some suspension system defects Correct Answer-Missing or broken leaf springs, leaking shock absorbers, broken spring hangers, torque rod (arm, ubolts, spring hangers, or other axle positioning parts) cracked or damaged Name three kinds of emergency equipment you must have Correct Answer-Fire extinguisher, 3 red triangles, spare fuses, flare What is the minimum tread depth for front tires? For other tires? Correct Answer-4/32" for front tires, 2/32" for all others Name some things you should check on the front of your vehicle during the walk around inspection Correct Answer-Condition of axle and steering system (grab for looseness), condition of the windshield (clean/dirty, damaged, wiper arms, wiper blades, and lights & reflectors (amber at front for clearance and reflectors, white or amber for turn signal)
