CDL Full Practice Test Part 5

1. A CDL driver is operating a 60-foot combination vehicle at 55 mph on a wet highway during steady rain. The vehicle is equipped with cruise control. Which action must the driver take?

2. A driver operating a double-trailer combination (twin 28-foot trailers) is preparing to make a left turn from a four-lane highway onto a two-lane road. The intersection has moderate traffic with vehicles waiting to turn right from the opposite direction. Analyze the factors affecting this turn and determine the safest approach considering the increased off-tracking characteristics of doubles.

3. A CDL driver is operating a tractor-semitrailer on a four-lane highway at 60 mph. The driver needs to check mirrors while maintaining forward awareness. Which visual search pattern should this driver follow?

4. When inspecting the suspension system during a pre-trip inspection, which condition of the spring hangers would indicate an out-of-service condition requiring immediate correction?

5. A driver is performing a pre-trip inspection and discovers that two of the three required reflective triangles are present in the cab, but one triangle is missing. Later during the trip, the vehicle experiences a mechanical breakdown on a divided highway (four lanes, two directions). Which statement correctly describes the regulatory compliance and safety implications?

6. A property-carrying driver finishes their shift at 7:00 PM on Friday with 68 on-duty hours accumulated over the past 7 days. They take 34 consecutive hours off duty, returning to work at 5:00 AM on Sunday. Under the 34-hour restart provision, what is their on-duty hour calculation for the next 7-day period?

7. A truck driver’s vehicle has a single axle currently weighing 22,500 lbs while traveling on an interstate highway. What action should the driver take to comply with federal weight regulations?

8. A driver is operating a combination vehicle on a downhill grade when the low-pressure warning activates at 60 PSI. The driver notices pressure continuing to drop to 45 PSI despite taking foot off the brake. What will happen automatically at approximately 20-45 PSI, and what should the driver have already done?

9. What is off-tracking in a combination vehicle?

10. During a pre-trip inspection, a driver pumps the brake pedal with the engine off to reduce air pressure. The air pressure drops from 120 PSI to 95 PSI, but the compressor does not start pumping. What should the driver conclude from this observation?