While checking a straight truck, you find that the two tires in one dual-wheel pair are touching. Their tread still looks deep. How should you treat the contact?
Correct answer: As a tire condition that needs correction before the truck is used
Dual tires must not rub each other or other vehicle parts. Adequate-looking tread does not make tire-to-tire contact safe. Have the cause assessed and corrected rather than guessing an inflation or spacing adjustment.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical25, printed2-1; 2.1.3 What to Look For - Tire Problems; also physical30, printed2-6, Right Rear. ↗
Fresh rust trails appear around several wheel nuts during a parked truck inspection. What is the appropriate interpretation?
Correct answer: They may indicate looseness and call for a proper wheel-fastener check
Rust around wheel nuts can be a clue to loose fasteners. It is a reason for a proper check, not proof of the exact cause or permission to keep operating until a nut falls off. Follow the applicable wheel-service procedure; no torque recipe is given here.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical26, printed2-2; 2.1.3 What to Look For - Wheel and Rim Problems. ↗
A truck's brake friction material has plenty of thickness left, but oil is visible on its working surface. Which conclusion is sound?
Correct answer: The contamination is a defect even though the material is not worn thin
Oil, grease or brake fluid on brake shoes or pads is a defect separate from lining thickness. The source lists contamination and excessive wear as different problems. Arrange correction rather than attempting to burn the oil away through driving.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical26, printed2-2; 2.1.3 What to Look For - Bad Brake Drums or Shoes. ↗
A leaf-spring hanger on a truck is visibly broken, but the truck is still standing. Why is this more than a ride-comfort issue?
Correct answer: The damaged suspension can allow the axle to move out of position
Suspension parts support the vehicle and keep its axles properly located. A broken hanger can compromise that positioning even if the parked truck has not visibly collapsed. The question does not use the manual's numerical out-of-service example.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical26, printed2-2; 2.1.3 Suspension System Defects; Figure2.2 Key Suspension Parts, with continuation physical27/printed2-3. ↗
At the end of a trip, a driver is completing the carrier's vehicle-condition report. A new mechanical symptom did not stop the truck, but could lead to a breakdown. What belongs in the report?
Correct answer: The symptom, so it can be assessed and addressed before further operation
Report conditions affecting safety or potentially leading to mechanical breakdown. A useful defect report need not wait for a complete failure or a confirmed diagnosis. The scenario already provides a report; it does not assert that every carrier must file a no-defect report every day.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical31, printed2-7; 2.1.7 After-trip Inspection and Report. ↗
Before departure, a driver notices a loose metal flashlight and a bottle on the cab floor near the pedals. Why should they be put in a secure location?
Correct answer: They could interfere with controls or strike an occupant during a sudden event
Loose cab articles can interfere with operation of controls or become striking objects in a crash. Secure them before moving. This concerns the driver's working space, not freight tiedown or cargo-weight rules.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical31, printed2-7; 2.1.5 Seven-step Inspection Method - Get In Vehicle, secure loose articles. ↗
A tall straight truck must back into an unfamiliar service entrance. The pavement immediately behind it looks clear in the mirrors, but a canopy is overhead. What should happen before backing?
Correct answer: Get out safely and inspect the complete path, including overhead and side clearance
A backing-path check includes the sides and overhead area, not only objects at tire level. Inspect the actual path before starting and stop to recheck whenever uncertain. Another vehicle's successful entry does not establish clearance for this truck.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical32, printed2-8; 2.2.4 Backing Safely - Look at Your Path; also2.7.4 physical41/printed2-17. ↗
A driver and a helper who have never worked together are preparing a backing maneuver. The helper is in a safe position visible to the driver. What should they settle before the truck moves?
Correct answer: A mutually understood set of signals, including an unmistakable stop signal
Driver and helper should agree on signals before backing, especially the signal to stop. Visibility of the helper does not ensure that an unfamiliar gesture will be understood. This is workplace backing safety, not a practical-test scoring rule.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical33, printed2-9; 2.2.4 Backing Safely - Use a Helper, continued from physical32/printed2-8. ↗
A qualified driver is assigned a truck with an auxiliary transmission different from the one previously used. What is the right preparation?
Correct answer: Learn this truck's shift pattern and operating instructions before using it
Auxiliary transmissions and multi-speed axles can have different shift patterns. Learn the system on the actual vehicle. The manual's example does not make a particular control layout or double-clutch sequence universal.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical33, printed2-9; 2.3.2 Multi-speed Rear Axles and Auxiliary Transmissions. ↗
A truck has a driver-controlled retarder that applies retarding force to its drive wheels. The route ahead is icy. What does the manual advise about this retarder?
Correct answer: Turn it off because its drive-wheel braking can cause a skid
On the stipulated driver-controlled drive-wheel retarder, retarding force can exceed available grip on ice. The manual advises turning it off on slippery roads. This is not an instruction to defeat ABS or another automatic safety system.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical34, printed2-10; 2.3.4 Retarders, continuation from physical33/printed2-9; Caution. ↗
While regularly checking a truck's mirrors, the driver sees a car approaching alongside. It then disappears from the mirror view without being seen ahead. What should the driver consider?
Correct answer: The car may now occupy a blind area beside the truck
Regular mirror checks help track vehicles that move into areas the mirrors cannot show. Do not treat disappearance from the view as proof of a clear lane. Maintain awareness and verify space before any lateral maneuver.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical34, printed2-10; 2.4.2 Seeing to the Sides and Rear - Traffic, blind spots. ↗
A driver wants to watch a vehicle behind the truck and keeps staring into one mirror. What is the safer observation pattern while continuing along the road?
Correct answer: Use brief mirror checks and return attention to the roadway ahead
A long mirror fixation allows the truck to travel without current information about the road ahead. Make quick checks and keep shifting attention between surrounding traffic and the forward scene.
Source: North Carolina Commercial Driver's License Manual, 2005 CDL Testing System, Version July 2014; current NCDMV-linked 162-page PDF, metadata modified August 25, 2026; Section2 Driving Safely, physical35, printed2-11; 2.4.2 Seeing to the Sides and Rear - How to Use Mirrors. ↗
