CDL Full Practice Test Part 4

1. During a pre-trip inspection, a driver measures the slack adjuster push rod travel at 1.25 inches on the front brake chamber of a truck. The air pressure is at 90 PSI during the test. The driver continues the inspection, noting that all other slack adjusters show 0.75 inches of travel. What is the correct assessment and action?

2. What is the disqualification period for a CDL holder with two convictions for serious traffic violations within a three-year period?

3. What is the maximum acceptable push rod travel for a manually adjusted slack adjuster on a drum brake system during inspection?

4. A 19-year-old driver obtains a CDL in Texas and applies for a job. The employer offers two positions: Position A requires driving routes from Dallas to Houston and back (within Texas only). Position B requires driving from Dallas to Oklahoma City and back (crossing state lines). The driver wants to accept the higher-paying interstate position. Which analysis correctly determines the driver’s eligibility under federal driver qualification standards?

5. During a CDL skills test, an applicant is performing the straight-line backing exercise. The applicant completes the maneuver with two boundary encroachments and one pull-up. What is the total point score for this exercise?

6. A CDL driver is operating a 65-foot combination vehicle on a two-lane highway when a passenger car begins following very closely behind the trailer, staying in the CMV’s rear no-zone. Which communication method should the driver use FIRST to address this dangerous situation?

7. A driver has just coupled a tractor to a semitrailer and supplied air to the trailer system. The trailer air tanks have built to full pressure, and the driver wants to test the trailer brakes before proceeding. What is the correct method for testing trailer brake function?

8. A school bus driver is transporting 35 students when the bus stalls on railroad tracks at a crossing with no signals visible. The driver attempts to restart the engine twice without success. What is the correct immediate action sequence?

9. A driver operating a loaded tanker vehicle on a slippery two-lane road feels the rear of the trailer begin to slide toward the left during a curve. The driver’s initial reaction is to brake hard and steer sharply toward the right shoulder. What is the likely outcome of this response, and what should the driver have done instead?

10. What precaution must a CDL driver take when operating a CMV equipped with an automatic transmission?