CDL Full Practice Test Part 13

1. A tractor-semitrailer rolls over while negotiating an interstate highway curve at 50 MPH. Investigation reveals the following: the cargo was palletized goods loaded to the full height of the trailer (high center of gravity), the curve had an advisory speed of 35 MPH, the driver entered the curve at 50 MPH and did not brake until mid-curve, and the road surface was dry. Which combination of factors contributed most directly to this rollover?

2. What is the minimum age requirement for a driver to obtain a CDL for interstate commerce?

3. A CDL skills test applicant completes the parallel parking (conventional) exercise with the vehicle fully within the boundary lines at the correct final position. During the maneuver, the applicant made four pull-ups (stopping and pulling forward to reposition) and two outside vehicle observations (looking in the direction of travel before movement). No boundary encroachments occurred. The applicant’s final position is correct. How should this exercise be scored under standard AAMVA criteria?

4. Which three pieces of emergency equipment are required to be present and properly maintained in every commercial motor vehicle during the cab check portion of a pre-trip inspection?

5. A CMV with air brakes is traveling at 55 MPH. The air brake lag time is approximately 0.5 seconds. Given that perception distance is approximately 150 feet and reaction distance is approximately 60 feet at this speed, what is the total distance the vehicle travels before the brakes actually begin to engage after the driver perceives a hazard and applies the brake pedal?

6. A driver performing a pre-trip inspection on a Class A tractor-semitrailer follows this sequence: starts the engine first, then checks oil pressure and belts, then does the walk-around, then checks the cab gauges, then inspects the trailer. Which step in this sequence is incorrectly ordered according to proper pre-trip procedures?

7. A driver is coupling a converter dolly to the first trailer in a doubles combination. The driver connects the glad hands and observes that air is flowing to the dolly brakes. Which glad hand color coding indicates the emergency (supply) line versus the service line?

8. A motor carrier receives a DVIR from a driver reporting that the left rear brake chamber shows visible cracks. The carrier schedules repairs for the following week and continues dispatching the vehicle. A roadside inspection places the vehicle out of service for the brake chamber defect. What record-keeping violation occurred?

9. What is the purpose of maintaining adequate space to the sides of a commercial motor vehicle, and which areas present the greatest risk due to limited visibility?

10. A CDL driver is preparing to make a left turn from a two-lane highway onto a side road. The driver activates the turn signal 500 feet before the turn and begins slowing. A following vehicle in a passenger car appears to be unaware of the upcoming turn and is closing the distance rapidly. The driver notices the vehicle entering the rear no-zone. Which analysis best describes the communication failure and what action should the driver take?