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Tanker practice questions

30 questions from the cdl endorsements practice test.

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Tanker practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

What do bulkheads do in a liquid tank?

  1. Let liquid flow slowly between sections
  2. Strengthen it against outside impacts
  3. Vent vapors from the top of the load
  4. Divide it into separate smaller tanks
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D. Divide it into separate smaller tanks

Solid bulkheads split the tank into separate compartments. The dividers that have holes to let liquid pass are baffles, which is the usual mix-up.

Reference: AAMVA CDL Manual, Section 8.2

Baffles in a liquid tank are:

  1. Bulkheads with holes that let liquid flow through
  2. Solid walls that seal one compartment from the next
  3. Relief valves that open when the liquid expands
  4. Outside rails that protect the valves in a rollover
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A. Bulkheads with holes that let liquid flow through

Baffles are dividers with openings. The liquid can pass through, but its forward and backward movement is slowed. Solid walls are bulkheads, which create fully separate compartments.

Reference: AAMVA CDL Manual, Section 8.2

Which kind of surge can still cause a rollover in a baffled tank?

  1. Front-to-back surge
  2. Top-to-bottom surge
  3. Compartment surge
  4. Side-to-side surge
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D. Side-to-side surge

Baffles run across the tank, so they slow forward and backward movement but do little to stop liquid shifting sideways. That sideways surge is what tips a tanker in a curve.

Reference: AAMVA CDL Manual, Section 8.2

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