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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 a Bulkhead?
  • Used to elevate liquid to a higher center of gravity
  • A divider inside a tank to section off liquid or gas
  • Used to hold all liquid or gas to one side of the tank
  • 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.

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What type of tanker trailers are normally unbaffled?
  • Fuel tankers
  • All tanker trucks are equipped with baffles
  • Tankers designed to haul non-liquid products
  • Food grade 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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The amount of liquid to load into a tank depends on:
  • The weight of the liquid
  • The amount the liquid will expand in transit (outage)
  • All of these should be taken into consideration when loading liquid into a tank
  • 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.
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How are bulkheads different than baffles?
  • Bulkheads are only used in gas tankers and baffles are only used in liquid tankers
  • Bulkheads are solid barriers in a tank while baffles are barriers with holes in them, allowing liquid to flow through
  • Bulkheads are only allowed in food-grade tankers where baffles can be installed in any type of tanker
  • Baffles are solid barriers in a tanks while bulkheads 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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While driving a liquid tanker around a curve, you should:
  • Always drive the posted speed for a curve
  • Understand that the posted speed for a curve may be too fast for a tank vehicle
  • 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
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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All of the following tanker-specific inspections are correct, except:
  • Check pipes, connections and hoses for leaks
  • All of these inspections are true and correct
  • Make sure intake, discharge, and cut-off valves are in the correct position before loading, unloading or moving the vehicle
  • Make sure manhole covers and vents have gaskets and that they close correctly
This is a question from page 60 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

On all tank vehicles, the most important item to check for is leaks. Check under and around the vehicle for signs of any leaking. Do not carry liquids or gases in a leaking tank. In general, check the following:

  • Tank body or shell for dents or leaks.
  • Intake, discharge and cut-off valves. Make sure valves are in correct position before loading, unloading or moving the vehicle.
  • Pipes, connections and hoses for leaks, especially around joints.
  • Manhole covers and vents. Make sure covers have gaskets and that they close correctly. Keep vents clear so they work correctly.
  • Special purpose equipment. If your vehicle has any of the following equipment, make sure it works:
    • Vapor recovery kits.
    • Grounding and bonding cables.
    • Emergency shut-off systems.
    • Built-in fire extinguisher.

Make sure you know how to operate your special equipment. Check the emergency equipment required for your vehicle. Find out what equipment you are required to carry and make sure you have it (and it works).

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

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Baffled tanks are:
  • Used only for gas products
  • Tanks without any bulkheads
  • Liquid tanks with several bulkheads containing holes that liquid can flow through
  • Designed to contain several solid bulkheads
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.

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