A partially filled liquid tanker comes to a stop on a slippery surface. A liquid wave continues toward the front of the tank. What hazard remains even though the wheels have stopped?
Correct answer: The moving liquid can push the stopped vehicle forward
A liquid wave striking an end of the tank pushes in the wave's direction. The manual warns that surge can move a stopped truck on a slippery surface. A complete wheel stop is not proof that liquid motion has ceased.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.2 - Danger of Surge; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
During an ordinary, controlled stop in a partially filled liquid tanker, the driver wants to release the service brake immediately as the truck first stops, although the liquid is still surging. What is the better approach?
Correct answer: Keep the steady brake pressure needed to hold the stop rather than releasing too soon
The tank guidance warns against releasing brake pressure too soon when stopping because the liquid can continue to move. This is an ordinary-stop principle, not an ABS pumping instruction, emergency braking method or parking procedure.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.3.2 - Controlling Surge / ordinary stopping; printed 65, physical 65. Current DDS-linked edition reviewed September 13, 2026. ↗
A tanker has genuinely separate compartments. Unloading the rear compartments would leave most of the remaining cargo near the front. What must be checked before continuing with that plan?
Correct answer: The resulting front-to-rear weight distribution, not just the total weight removed
Separate-compartment loading and unloading require attention to where weight remains. A lower total does not automatically provide suitable front-to-rear distribution. No axle-weight number or universal unloading order is asserted.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.3 - Bulkheads / loading and unloading separate tanks; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
A loading plan assumes that liquid cannot pass between two sections of a tank. Inspection of the design shows openings through the internal divider. Why must the isolation assumption be reconsidered?
Correct answer: Liquid can flow through those openings, so the sections are not isolated merely by that divider
The source describes baffles with openings through which liquid can flow. Do not treat every baffle as a sealed compartment boundary. The question identifies the design limitation; it gives no permission to mix cargoes or change a loading plan without proper verification.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.4 - Baffled Tanks / flow through openings; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
A tank's transverse baffles reduce forward-and-back liquid movement. A driver concludes that the tank can no longer have a liquid-movement-related rollover. What has been overlooked?
Correct answer: Side-to-side surge can still occur despite that fore-and-aft control
The manual specifically retains lateral surge and rollover risk in baffled tanks. Reduced fore-and-aft movement is not a guarantee against motion in another direction or against rollover.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.4 - Baffled Tanks / lateral surge; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
A tank inspection covers the shell and valve bodies, but the driver skips the places where cargo pipes, hoses and fittings join. What remains to be done?
Correct answer: Inspect the cargo plumbing for leaks, paying particular attention to joints
The manual separately identifies pipes, connections and hoses, especially their joints, as leak-inspection points. A sound-looking shell or a closed valve does not establish that every connection is leak-free.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.1.1 - Leaks / pipes, connections and hoses, especially joints; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
A loading proposal would fill a cargo tank completely so that no free space remains for liquid movement. The liquid can warm during the trip. Why must that proposal be rejected?
Correct answer: The warming liquid needs the appropriate space to expand
The manual requires room for liquid expansion rather than a totally full cargo tank. Reducing free space to address surge cannot override the liquid's outage requirement. No fixed fill percentage is prescribed.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.6 - Outage / expansion as liquid warms; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
The same tank will carry a different liquid on the next trip. A driver proposes reusing the previous liquid's expansion-space allowance without checking the new cargo. What is the correct response?
Correct answer: Determine the outage requirement for the new liquid because expansion amounts differ
Different liquids can expand by different amounts. The appropriate outage is cargo-specific, so a prior liquid's allowance is not automatically transferable. Other loading constraints still apply.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.6 - Outage / different liquids; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
A proposed load of a dense liquid would reach the vehicle's allowable weight while unused tank volume still remains. What should govern the decision about adding more liquid?
Correct answer: Do not exceed the applicable weight allowance merely to use the remaining tank space
A dense liquid can reach the weight constraint before the tank's volume is filled. The amount loaded must account for liquid weight and applicable limits as well as expansion. This item sets no legal numerical limit or cargo-specific formula.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > 8.2.7 - How Much to Load? / continuation from printed/physical 64; printed 65, physical 65. Current DDS-linked edition reviewed September 13, 2026. ↗
A tanker is assigned a liquid that is not classified as hazardous material. A driver proposes treating it like rigid cargo because no hazardous-material classification is involved. What is the correct distinction?
Correct answer: Its nonhazardous classification does not remove the handling effects of moving liquid
The liquid's movement and the tank's physical design still affect handling. This is a tank-driving distinction, not a question about endorsement thresholds, placarding or hazardous-material classification rules.
Source: Georgia DDS Commercial Driver's Study Guide, 2023-2024 cover, retained PDF modified June 16, 2025; Section 8 > Section 8 introduction; 8.2 - Driving Tank Vehicles; 8.2.2 - Danger of Surge; printed 64, physical 64. Current DDS-linked edition reviewed September 13, 2026. ↗
