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New York CDL Tank Vehicles: random practice

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Question 1 of 12
  1. 1. For a vehicle requiring a CDL, which attached liquid or gas tank capacities meet the federal tank-vehicle definition?
  2. 2. Under the federal CLP rule, what cargo restriction applies to a learner with a tank endorsement?
  3. 3. Which cargo-tank defect can make it unsafe to transport a load?
  4. 4. What should a driver do after discovering that a cargo tank is leaking?
  5. 5. Before loading, unloading, or moving a tank vehicle, what must be verified about its valves?
  6. 6. What should be checked at tank manhole covers and vents?
  7. 7. A tanker has vapor recovery, grounding cables and emergency shutoffs. What should the driver do before operating it?
  8. 8. Which cargo-tank condition must be corrected before travel?
  9. 9. Which load characteristic contributes directly to a liquid tanker's rollover risk?
  10. 10. How should a tanker driver approach highway, entrance-ramp, and exit-ramp curves?
  11. 11. What can liquid surge do after a partly filled tanker stops on a slippery road?
  12. 12. When loading a tank divided into separate compartments by bulkheads, what deserves special attention?
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  1. For a vehicle requiring a CDL, which attached liquid or gas tank capacities meet the federal tank-vehicle definition?

    Correct answer: Each qualifying tank exceeds 119 gallons; combined capacity is at least 1,000 gallons

    The federal definition uses rated tank capacity, not the quantity currently loaded, and includes permanent or temporary attachment. Its narrow exception covers an empty storage-container tank of at least 1,000 gallons that is not designed for transportation and is temporarily attached to a flatbed. An empty tank designed for transportation is not automatically exempt. Tank operation requires the applicable endorsement; hazardous cargo can require additional authorization.

    Source: 49 CFR 383.5, Tank vehicle definition; 383.93(b)(3); current eCFR displayed up to date September 10, 2026; reviewed September 12, 2026 ↗

  2. Under the federal CLP rule, what cargo restriction applies to a learner with a tank endorsement?

    Correct answer: The tank must be empty and any previous hazardous-material residue purged

    An N-endorsed CLP permits only an empty tank vehicle. A tank that previously contained hazardous material must be purged of residue. Other CLP conditions, including the qualified accompanying CDL holder, still apply.

    Source: 49 CFR 383.25(a)(5)(iii), with supervisor condition in (a)(1); current eCFR displayed up to date September 10, 2026; reviewed September 12, 2026 ↗

  3. Which cargo-tank defect can make it unsafe to transport a load?

    Correct answer: A leaking valve or tank seam

    Inspect the tank, valves, pipes, hoses and connections for leaks. Do not carry liquid or gas cargo in a leaking tank.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.1 Leaks, printed page 8-1 (physical PDF page 1) ↗

  4. What should a driver do after discovering that a cargo tank is leaking?

    Correct answer: Do not transport cargo in it

    Do not transport liquid or gas cargo in a leaking tank. Correct the leak before using the tank to carry cargo.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.1 Leaks, printed page 8-1 (physical PDF page 1) ↗

  5. Before loading, unloading, or moving a tank vehicle, what must be verified about its valves?

    Correct answer: They are in the correct positions

    Intake, discharge, and cutoff valves must be checked for leaks and set correctly for the operation.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.1 Leaks — valves, printed page 8-1 (physical PDF page 1) ↗

  6. What should be checked at tank manhole covers and vents?

    Correct answer: Sound gaskets, correctly closed covers, clear vents

    Secure gasketed covers prevent leaks, while clear vents must remain able to function.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.1 Leaks — manhole covers and vents, printed page 8-1 (physical PDF page 1) ↗

  7. A tanker has vapor recovery, grounding cables and emergency shutoffs. What should the driver do before operating it?

    Correct answer: Check that the installed special-purpose equipment works

    Vapor recovery, grounding and bonding cables, emergency shutoffs, and built-in extinguishers require inspection.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.2 Check Special Purpose Equipment, printed page 8-1 (physical PDF page 1) ↗

  8. Which cargo-tank condition must be corrected before travel?

    Correct answer: Open discharge valve or manhole cover

    Discharge valves and manhole covers must be properly closed before travel. This does not mean blocking the vents; vents must remain clear and functional.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.1.2 Check Special Purpose Equipment — Caution, printed page 8-1 (physical PDF page 1) ↗

  9. Which load characteristic contributes directly to a liquid tanker's rollover risk?

    Correct answer: A high center of gravity

    Much of the load weight is high above the road, making the vehicle top-heavy.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.2.1 High Center of Gravity, printed page 8-2 (physical PDF page 2) ↗

  10. How should a tanker driver approach highway, entrance-ramp, and exit-ramp curves?

    Correct answer: Well below the posted curve speed

    Tankers can roll even at posted curve speeds, so the driver must reduce speed well below them.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.2.1 High Center of Gravity, printed page 8-2 (physical PDF page 2) ↗

  11. What can liquid surge do after a partly filled tanker stops on a slippery road?

    Correct answer: Shove the stopped vehicle forward

    A moving liquid wave can strike the tank end and shove the vehicle in the wave direction.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.2.2 Danger of Surge, printed page 8-2 (physical PDF page 2) ↗

  12. When loading a tank divided into separate compartments by bulkheads, what deserves special attention?

    Correct answer: Front-to-rear weight distribution

    Separate compartments can overload the front or rear if their weight is distributed poorly.

    Source: New York State Commercial Driver's Manual CDL-10 (11/25), 8.2.3 Bulkheads, printed page 8-2 (physical PDF page 2) ↗

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New York CDL Tank Vehicles: random practice

20 questions from the 25-question subject question set. Restart for another selection. This is untimed study with feedback, not the official test.

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Twenty is the length of this study session, not an asserted official test count. Complete all applicable chapters of the NY DMV commercial driver manual and required practical training.