CDL Full Practice Test Part 3

1. During the engine compartment portion of a pre-trip inspection (with engine off), what is the maximum acceptable belt deflection when pressed at the midpoint between pulleys?

2. A driver is making a right turn from a two-lane road onto a four-lane highway with a tractor-semitrailer. A pedestrian is standing near the curb at the corner, and a car is stopped in the right lane of the highway waiting to turn left. How should the driver manage this turn to account for off-tracking and surrounding traffic?

3. You are driving a tractor-semitrailer on a highway at night during winter. The temperature is 28°F, and you are approaching a bridge over a river. The road surface ahead appears wet, but you notice that other vehicles are reducing speed as they cross the bridge. What hazard should you anticipate, and what is the correct driving response?

4. You are driving a 70-foot combination vehicle on a four-lane highway at 55 MPH in moderate rain. Traffic is heavy in all lanes. A small car is in your right-side blind spot, and another vehicle is following you at approximately 3 seconds behind. You notice an upcoming underpass with a clearance sign partially obscured by graffiti. Which space management concern presents the MOST immediate safety risk?

5. At the end of a 10-hour driving day, Driver Chen prepares her DVIR and notes that two brake chambers show minor surface rust and one slack adjuster has 1 inch of push rod travel. She is unsure whether these are reportable defects. What is the correct approach to DVIR completion?

6. A driver is operating a 65-foot combination vehicle at 50 mph on a dry highway. What is the minimum safe following distance this driver should maintain?

7. A CDL driver operating a placarded hazardous materials vehicle is convicted of failing to stop at a railroad-highway grade crossing as required by 49 CFR Part 392.10. This is the driver’s second conviction for a railroad crossing violation within a 3-year period. What disqualification period will the driver face?

8. During the straight-line backing maneuver on the skills test, the driver’s trailer begins drifting toward the left boundary line. What corrective action should the driver take?

9. What is the primary purpose of the governor in an air brake system?

10. A driver is operating a tractor-trailer on an icy highway. When approaching a slowed vehicle ahead, the driver applies firm brake pressure. The ABS activates, causing a rapid pulsing sensation in the brake pedal. The driver’s instinct is to release the brakes, but what is the correct response, and why?