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CDL Practice Test: Tankers

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CDL Practice Test: Tankers

Tankers Questions

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Good Luck!

Baffled tanks are:
  • Tanks without any bulkheads
  • Liquid tanks with several bulkheads containing holes that liquid can flow through
  • Designed to contain several solid bulkheads
  • Used only for gas products
This is a question from page 61 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

Baffled liquid tanks have bulkheads in them with holes that let the liquid flow through. The baffles help to control the forward and backward liquid surge. Side-to-side surge can still occur. This can cause a roll over.

Next
How are bulkheads different than baffles?
  • Baffles are solid barriers in a tanks while bulkheads are barriers with holes in them, allowing liquid to flow through
  • Bulkheads are only used in gas tankers and baffles are only used in liquid tankers
  • Bulkheads are only allowed in food-grade tankers where baffles can be installed in any type of tanker
  • Bulkheads are solid barriers in a tank while baffles are barriers with holes in them, allowing liquid to flow through
This is a question from page 61 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

Bulkheads: Some liquid tanks are divided into several smaller tanks by bulkheads. When loading and unloading the smaller tanks, the driver must pay attention to weight distribution. Do not put too much weight on the front or rear of the vehicle.


Baffled tanks: Baffled liquid tanks have bulkheads in them with holes that let the liquid flow through. The baffles help to control the forward and backward liquid surge. Side-to-side surge can still occur. This can cause a roll over.

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What is Liquid Surge?
  • When liquid naturally swirls inside of a tank
  • Results from movement of the liquid in partially filled tanks
  • If the tank is punctured, the liquid will rush out of the opening
  • None of these answers are correct
This is a question from page 61 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

Liquid surge results from movement of the liquid in partially filled tanks. This movement can have bad effects on handling. For example, when coming to a stop, the liquid will surge back and forth. When the wave hits the end of the tank, it tends to push the truck in the direction the wave is moving. If the truck is on a slippery surface such as ice, the wave can shove a stopped truck out into an intersection. The driver of a liquid tanker must be very familiar with the handling of the vehicle.

TruckingTruth's Advice:

Liquid surge can result from nearly any conceivable movement. Steering left, right, accelerating, or slowing down can all cause liquid to surge. Even after stopping a liquid filled tanker, the liquid will surge back, then forward again, possibly forcing your truck to "jump" forward once more. That's why it's good practice to stay further back from vehicles, even when stopped.

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When loading a tank, you should:
  • Expect liquid to evaporate and lighten your gross weight over time
  • Use disposable baffles and barriers when hauling food grade tankers
  • Always load a cargo tank with "filler" so that it's completely filled
  • Never load a cargo tank so that it's totally full
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Never load a cargo tank totally full. Liquids expand as they warm and you must leave room for the expanding liquid. This is called "outage." Since different liquids expand by different amounts, they require different amounts of outage. You must know the outage requirement when hauling liquids in bulk.

A full tank of dense liquid (such as some acids) may exceed legal weight limits. For that reason, you often may only partially fill tanks with heavy liquids. The amount of liquid to load into a tank depends on:

  • The amount the liquid will expand in transit.
  • The weight of the liquid.
  • Legal weight limits.
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Next
How much do liquids expand as they warm?
  • Liquids expand at 1kg/m per 10 degree increase
  • None of these answers are correct
  • different liquids expand by different amounts
  • Most liquids do not expand when heated
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Never load a cargo tank totally full. Liquids expand as they warm and you must leave room for the expanding liquid. This is called "outage." Since different liquids expand by different amounts, they require different amounts of outage. You must know the outage requirement when hauling liquids in bulk.

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Next
What type of tanker trailers are normally unbaffled?
  • Tankers designed to haul non-liquid products
  • Food grade tankers
  • All tanker trucks are equipped with baffles
  • Fuel tankers
This is a question from page 61 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

Unbaffled liquid tankers (sometimes called "smooth bore" tanks) have nothing inside to slow down the flow of the liquid. Therefore, forward-and-back surge is very strong. Unbaffled tanks are usually those that transport food products (e.g., milk). (Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank.) Be extremely cautious (slow and careful) in driving smooth bore tanks, especially when starting and stopping.

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Next
While driving a liquid tanker around a curve, you should:
  • Always drive the posted speed for a curve
  • Be confident that your lower center of gravity will reduce the risk of a rollover
  • Use quick steering movements to keep liquids from collecting on one side
  • Understand that the posted speed for a curve may be too fast for a tank vehicle
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Curves: Slow down before curves, then accelerate slightly through the curve. The posted speed for a curve may be too fast for a tank vehicle.

TruckingTruth's Advice:

All maneuvers in a tanker truck should be made slower and smoother than other vehicle types.

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What is Outage?
  • When liquids condense as they warm
  • When liquids condense as they cool
  • When liquids expand as they cool
  • When liquids expand as they warm
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Never load a cargo tank totally full. Liquids expand as they warm and you must leave room for the expanding liquid. This is called "outage." Since different liquids expand by different amounts, they require different amounts of outage. You must know the outage requirement when hauling liquids in bulk.

A full tank of dense liquid (such as some acids) may exceed legal weight limits. For that reason, you often may only partially fill tanks with heavy liquids. The amount of liquid to load into a tank depends on:

  • The amount the liquid will expand in transit.
  • The weight of the liquid.
  • Legal weight limits.
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