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. ↗
A following motorist asks a truck driver for a hand signal saying the oncoming lane is clear enough to pass. What should the truck driver do?
Correct answer: Avoid giving an all-clear signal that directs the motorist to pass
Do not direct another driver to pass. That driver must judge whether the complete maneuver is safe and lawful. An all-clear gesture can be misunderstood or relied upon after conditions change; ordinary courtesy is not a guarantee of a safe gap.
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, physical36, printed2-12; 2.5.1 Signal Your Intentions - Don't Direct Traffic. ↗
A straight truck must slow substantially for a tight entrance ahead. A car follows at a reasonable distance. How should the truck driver prepare that driver for the speed change?
Correct answer: Give early warning and slow gradually before the tight turn
Car drivers may not anticipate the low speed needed for a large vehicle's tight turn. Early signaling and gradual slowing give them time to respond. This is planned communication, not deliberate brake-checking or a prescribed brake-pumping technique.
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, physical36, printed2-12; 2.5.1 Signal Your Intentions - Tight Turns; preceding signal guidance physical35/printed2-11. ↗
A driver calculates only the distance a truck travels after the brakes begin slowing it. What has been left out when estimating the complete stop from first seeing a hazard?
Correct answer: The distance traveled while recognizing the hazard and reacting to it
Total stopping distance includes travel during perception and reaction as well as the braking phase. The truck continues moving before braking takes effect. No fixed reaction time, stopping-footage guarantee or air-brake-lag calculation is prescribed.
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, physical38, printed2-14; 2.6.1 Stopping Distance, with physical37/printed2-13 definitions; Figure2.11. ↗
A tall straight truck approaches a curve whose posted speed appears comfortable for nearby cars. What should govern the truck driver's entry speed?
Correct answer: Choose a safe speed for this truck and conditions, which may be below the posted value
A high-center-of-gravity truck can roll even while its tires retain traction. A posted value does not guarantee stability for every commercial vehicle. Select a suitable speed before entering, and never treat the sign as a required minimum.
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, physical39, printed2-15; 2.6.3 Speed and Curves; also2.8.2 Off Ramps/On Ramps physical43/printed2-19. ↗
A truck driver reduces speed at the start of a long work zone. Several minutes later the road still looks open, but construction restrictions remain in effect. What helps prevent an unintended increase in speed?
Correct answer: Keep checking the speedometer and the changing work-zone conditions
The manual specifically warns that speed can creep upward during a long construction section. Monitor speed and remain within current restrictions, reducing further when conditions require. A temporary lack of visible workers does not end the work zone.
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, physical39, printed2-15; 2.6.7 Roadway Work Zones. ↗
Cars in heavy traffic are traveling faster than the speed that is lawful and safe for the truck and conditions. How should the driver interpret advice to travel with traffic flow?
Correct answer: Match flow only when doing so remains lawful and safe, while preserving following space
The manual qualifies traffic-flow advice: it applies only when the resulting speed is not illegal or unsafe. Do not let surrounding traffic dictate a speed unsuitable for the truck, the road or the conditions.
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, physical39, printed2-15; 2.6.5 Speed and Traffic Flow, including its lawful/safe-speed qualification. ↗
On a straight, unobstructed lane, a wide truck has little spare width. Which ordinary lane position best preserves clearance on both sides?
Correct answer: Keep the truck centered in its lane while monitoring the available clearance
Keeping a wide commercial vehicle centered preserves what clearance is available on both sides. The scenario supplies a normal unobstructed lane; it is not a rule to ignore obstacles, traffic control or a special 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, physical41, printed2-17; 2.7.3 Space to the Sides - Staying Centered in a Lane. ↗
A tall truck cleared a particular underpass last year. The road beneath it has since been resurfaced, and the driver is unsure about today's clearance. What is the sound conclusion?
Correct answer: The usable clearance may have decreased; verify a safe route rather than assume the truck fits
Added pavement or accumulated material can reduce overhead clearance. Previous passage and an old posted height are not guarantees. If safe clearance cannot be established, use another suitable route rather than testing the opening with the vehicle.
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, physical41, printed2-17; 2.7.4 Space Overhead. ↗
