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CDL Practice Test: Tankers

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CDL Practice Test: Tankers

Tankers Questions

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Good Luck!

What is Liquid Surge?
  • None of these answers are correct
  • Results from movement of the liquid in partially filled tanks
  • When liquid naturally swirls inside of a tank
  • If the tank is punctured, the liquid will rush out of the opening
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.

Next
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.
Prev
Next
What is a Bulkhead?
  • Used to hold all liquid or gas to one side of the tank
  • Used to elevate liquid to a higher center of gravity
  • A divider inside a tank to section off liquid or gas
  • A device that is placed on the top of liquid or gas and compresses it as low as possible to decrease the center of gravity
This is a question from page 61 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

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.

Prev
Next
Regarding stopping distance while driving a tanker, which statement is false?
  • All of these statements are true
  • Wet roads double the normal stopping distance
  • Liquid surge may force your truck forward after you have already come to a complete stop
  • Fully loaded tankers take longer to stop than empty ones
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Stopping distance - Keep in mind how much space you need to stop your vehicle. Remember that wet roads double the normal stopping distance. Empty tank vehicles may take longer to stop than full ones.

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Next
What are unbaffled tanks?
  • Liquid is held in place by multiple barriers, restricting liquid surge
  • Small tanks which are loaded and secured onto flatbed trailers
  • There are no barriers inside to slow down or stop liquid from surging
  • There are barriers in the tank with holes in them to slow down and restrict surging liquid
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.

TruckingTruth's Advice:

Unbaffled tankers are much more dangerous to drive, especially when the tanks aren't completely full, as liquid can surge and slosh around in any direction hindering vehicle control.

Prev
Next
The amount of liquid to load into a tank depends on:
  • The amount the liquid will expand in transit (outage)
  • All of these should be taken into consideration when loading liquid into a tank
  • The weight of the liquid
  • Legal weight limits
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

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.
Prev
Next
What type of tanker trailers are normally unbaffled?
  • Food grade tankers
  • All tanker trucks are equipped with baffles
  • Fuel tankers
  • Tankers designed to haul non-liquid products
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.

Prev
Next
What term describes the following statement: Liquids expand as they warm and you must leave room for the expanding liquid.
  • Frontage
  • None of these answers are correct
  • Outage
  • Contraction
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

Liquids expand as they warm and you must leave room for the expanding liquid. This is called "outage."

Prev
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