A driver's new tank vehicle has a vent and valve layout that differs from the tank used during training. Which reference should establish the inspection checks for this vehicle?
Correct answer: This tank vehicle's operator manual and equipment instructions
Tank vehicles differ in design and equipment. Use the actual vehicle's operator manual to learn its tank-specific inspection instead of assuming that a familiar tank's arrangement applies.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1 - Inspecting Tank Vehicles; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A tank vehicle will be loaded while parked and will not leave the facility immediately afterward. Does remaining stationary remove the tank inspection described in Section 8?
Correct answer: No; inspection is needed before loading, even while parked
Section 8 calls for inspection before loading, unloading or driving a tanker. Remaining parked during a transfer does not make the tank, closures and related equipment irrelevant. This is an inspection requirement, not a loading procedure.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, Section 8 introduction, inspection before loading, unloading or driving; 8.1; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A pre-departure inspection confirms that liquid cargo is leaking from the tank system. The intended delivery is nearby. What should determine the departure decision?
Correct answer: Do not transport the liquid in the leaking tank; arrange proper correction
Do not carry liquid or gas in a leaking tank. A short distance, partial load or nonhazardous product does not establish a sound tank system. Have the problem properly assessed and corrected; no spill-cleanup or repair method is prescribed here.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.1 - Leaks, opening paragraph; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
The tank shell shows no visible leak, but the driver has not inspected the cargo piping and hoses. Which area does Section 8 particularly emphasize for the remaining leak check?
Correct answer: Pipes, hoses and connections, especially their joints
A sound-looking shell does not complete the tank-system leak inspection. Check the pipes, connections and hoses, with particular attention to joints where separate components meet.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.1 - Leaks, pipes/connections/hoses and joints; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A tank's manhole cover can be latched, but its required gasket is missing. Why is a latched appearance not enough for the departure inspection?
Correct answer: The cover must have its gasket and close correctly to form the intended closure
Section 8 calls for checking that manhole covers have gaskets and close correctly. A latched cover with a missing required sealing part does not pass that check; arrange correction according to the tank's instructions.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.1 - Leaks, manhole covers and gaskets; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
Debris obstructs a tank vent that is supposed to remain clear. The driver sees no liquid leak. What still needs attention?
Correct answer: The vent's proper function must be restored before the tank is used
Tank vents must remain clear so they work correctly. Absence of a visible leak does not show that an obstructed vent is functioning. Use the applicable equipment instructions and qualified assistance rather than improvising a vent repair.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.1 - Leaks, keep vents clear so they work correctly; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A tank's transfer work is complete. Some valves were moved during that work, and the driver is preparing to leave. What must be verified about them?
Correct answer: Each relevant valve is in the correct position for transport under this tank's instructions
Check intake, discharge and cutoff valves and verify their correct positions before moving the vehicle. The approved transport configuration depends on the actual system; this is not a blanket instruction to close every vent or every kind of valve.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.1 - Leaks, intake/discharge/cutoff valves and correct positions before loading/unloading/moving; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A tank is fitted with a vapor-recovery kit, bonding cables and an emergency shutoff system. Its routine truck checks are satisfactory. How should the fitted tank equipment be treated?
Correct answer: Include it in the inspection and verify that the fitted equipment works
Section 8 identifies special-purpose tank equipment that must work when fitted, including vapor recovery, grounding/bonding cables and emergency shutoffs. Ordinary truck checks do not establish the condition of those systems. No claim is made that every tanker must have every listed device.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.2 - Check Special Purpose Equipment, conditional 'if your vehicle has' list; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A driver moves from one tank assignment to another and wants to reuse the first vehicle's emergency-equipment checklist without checking it. What should be confirmed for the new assignment?
Correct answer: Which emergency equipment this vehicle requires, and that it is present and working
Find out what emergency equipment is required for the actual vehicle, then verify that it is carried and works. A previous vehicle's checklist or a similar-looking item is not proof that the new assignment's requirements are satisfied.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.1.3 - Special Equipment, required emergency equipment present and working; literal printed page 8-8-1, physical 103. Reviewed September 13, 2026. ↗
A partly filled liquid tanker has just stopped on a slippery approach. Why should the driver not assume that all cargo-related forces disappeared as soon as the wheels stopped?
Correct answer: Liquid can continue moving back and forth and push against the tank ends
Liquid in a partly filled tank can continue surging after the vehicle reaches a stop. When that moving liquid reaches a tank end, it can push the vehicle; on a slippery surface that can move a stopped truck. No fixed stopping-distance multiplier or brake technique is implied.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.2 - Danger of Surge; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
The operator's description says a tank is divided by solid bulkheads into smaller tank compartments. A driver assumes the whole load still occupies one freely connected liquid space. What needs correcting?
Correct answer: The bulkheads divide the tank into separate smaller compartments
The manual describes bulkheads as dividing some liquid tanks into several smaller tanks. That compartmented layout is different from a single freely connected space, but it does not eliminate liquid movement within each partly filled compartment.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.3 - Bulkheads; contrast 8.2.4 - Baffled Tanks; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
After a delivery, several rear compartments of a bulkhead-divided tanker are empty while loaded front compartments remain. The total cargo weight has decreased. What must still be assessed?
Correct answer: The remaining load's front-to-rear weight distribution
A lower total cargo weight does not by itself establish suitable distribution. When individual compartments are loaded or unloaded, check that too much weight is not concentrated at the front or rear. No universal equal-fill pattern or numerical axle limit is prescribed.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.3 - Bulkheads, weight distribution when loading/unloading smaller tanks; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A tank has internal baffles with openings through which liquid can pass. Which description matches their effect on liquid movement?
Correct answer: They allow flow while helping control forward-and-backward surge
Baffles have openings that allow liquid flow while helping control forward-and-backward surge. They are not sealed partitions that stop all liquid movement.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.4 - Baffled Tanks, openings and forward/backward surge; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A driver of a partly filled baffled liquid tank says a quick sideways maneuver cannot create a surge problem because baffles are installed. Which limitation is being overlooked?
Correct answer: Side-to-side surge can still occur despite the baffles
Baffles help control longitudinal surge but do not eliminate side-to-side liquid movement. That lateral movement can contribute to rollover risk, so baffling is not permission for abrupt steering.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.4 - Baffled Tanks, side-to-side surge and rollover limitation; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A driver familiar with baffled tanks is assigned a partly filled smooth-bore liquid tank with no internal surge-control baffles. What handling difference should be anticipated during starts and stops?
Correct answer: Forward-and-backward liquid surge can be especially strong
A smooth-bore tank lacks internal baffles that slow lengthwise liquid flow, so forward-and-backward surge can be strong. Starts and stops require particular smoothness. No claim is made that sanitation rules universally forbid baffles for food products.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.5 - Un-baffled Tanks, smooth-bore definition and strong longitudinal surge; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A loading plan leaves the specified empty space above an ordinary liquid cargo rather than filling the tank to its maximum volume. What purpose does that outage serve as the cargo warms?
Correct answer: It leaves room for thermal expansion of the liquid
Outage is space left for liquid expansion. Liquids can expand as they warm, so the correct load plan must preserve the cargo-specific required space; outage does not eliminate surge or other inspection and weight checks.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.6 - Outage; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A tank approved for a new liquid product has the same physical capacity as before. May the planner automatically use the previous product's outage allowance?
Correct answer: No; different liquids can require different expansion allowances
Different liquids expand by different amounts, so their required outage can differ. Verify the requirement for the actual cargo and conditions instead of copying another product's allowance. This is not a numerical fill limit or a product-handling procedure.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.6 - Outage, product-dependent expansion and requirement; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A loading planner compares two permitted liquid cargoes for the same suitable tank. The second liquid is denser. Why might its allowed load leave more unused tank volume?
Correct answer: The weight limit may be reached with a smaller volume of the denser liquid
The same volume of a denser liquid weighs more. A weight limit can therefore be reached before the tank's physical volume is filled. The load must also meet its expansion requirements and other applicable loading conditions; no legal weight number is invented.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.2.7 - How Much to Load?, dense liquid, weight and load limits; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A liquid-tank driver can see a routine stop well ahead and has room to prepare. Which plan follows the tank section's advice for controlling surge?
Correct answer: Begin slowing well in advance so the stop can be made smoothly
Plan the slowdown early and allow adequate following room so a routine stop need not be abrupt. Liquid surge is one reason tank driving calls for smooth starts, slowdowns and stops. This does not prescribe stab braking, override ABS instructions or delay emergency braking.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.3.1 - Drive Smoothly; 8.3.2 - Controlling Surge, early braking and following distance; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
A liquid tanker has a safe gap for a planned lane change. What should characterize the steering movement as the driver enters that gap?
Correct answer: A smooth, controlled movement that avoids abrupt sideways loading
Section 8 calls for smooth turns and lane changes because tankers combine liquid movement with a high center of gravity. Use the safe gap without adding an abrupt sideways demand. This is tank-specific control smoothness, not an instruction to ignore ordinary observation and signaling.
Source: North Carolina Commercial Driver's License Manual, current NCDMV-linked copy; 2005 CDL Testing System, July 2014. Section 8, 8.3.1 - Drive Smoothly; 8.2.4 lateral surge context; literal printed page 8-8-2, physical 104. Reviewed September 13, 2026. ↗
