CDL Full Practice Test Part 16

1. A driver is preparing to make a left turn at a four-way intersection in a 65-foot tractor-semitrailer. The intersection has oncoming traffic and the driver must wait for a gap before turning. The driver positions the tractor in the left portion of the lane. When a sufficient gap appears, what is the correct technique for executing this left turn while managing off-tracking?

2. A driver must back a double-trailer combination (twin 28-foot trailers) into a loading dock. Compared to backing a single 53-foot trailer, what additional challenges and precautions should the driver anticipate for the double-trailer backing maneuver?

3. A driver operating a 5-axle tractor-semitrailer combination measures the following axle spacing: steer axle to drive axle = 12 feet, drive axle to first trailer axle = 4 feet (tandem pair spaced at this bridge distance), trailer tandem axle spacing between the two axles = 4 feet. The total gross weight is 79,500 lbs distributed as: steer axle 11,500 lbs, drive axle 17,000 lbs, trailer tandem 34,000 lbs (each axle at 17,000 lbs). Analyze whether this configuration complies with the federal bridge formula under 49 CFR Section 658.17, and identify any violations.

4. A CDL driver is making a right turn at a tight urban intersection with a 53-foot trailer. There are parked cars on the right and a pedestrian waiting at the corner. The driver’s tractor is positioned in the right lane. What turning technique should the driver apply?

5. What is the maximum acceptable steering wheel play during the cab check portion of a pre-trip inspection for a commercial motor vehicle?

6. When must a property-carrying driver take a 30-minute break under 49 CFR 395.3(a)(3)(ii)?

7. A driver operating a 60-foot combination vehicle at 55 mph on an interstate begins experiencing heavy eyelids, frequent yawning, and realizes they cannot remember passing the last two mile markers. The driver has been on duty for 9 hours and has 150 miles remaining to destination. What is the correct immediate response?

8. During a CDL skills test alley dock exercise, an evaluator observes the applicant performing the following actions during the backing maneuver: (1) Before beginning to back, the applicant exits the vehicle and walks to the rear to inspect the backing path—this takes 15 seconds. (2) While backing, the applicant looks forward toward the front of the vehicle for approximately 3 seconds while the vehicle continues moving backward. (3) The applicant stops backing, exits the vehicle again to check position, then continues backing after re-entering. (4) At one point during backing, the applicant turns head to look at the left mirror while continuing to back. Analyze which actions are scored as errors and calculate the total points for these observations.

9. During the CDL skills test, an applicant is performing straight-line backing. The examiner observes that the applicant’s vehicle has crossed the boundary line on the right side. What is the correct action for the applicant to take?

10. What are the three components that make up total stopping distance for a commercial motor vehicle?