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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 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.

Next
Why don't most food grade tankers come equipped with baffles?
  • Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank
  • To save room in the tank, most shippers of liquid food products prefer to forgo baffles so more product can be loaded
  • Food grade tankers are required to be fitted with baffles or bulkheads
  • Food products are generally light enough that the entire tank can be filled, thus, limiting any 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:

Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank.

TruckingTruth's Advice:

Anytime you see a food grade tanker, it is safe to assume there are no baffles installed. Not only is that important for you to know when pulling a food grade tanker, but you can also drive differently around other vehicles that are pulling food grade tankers (give them more room).

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All of the following tanker-specific inspections are correct, except:
  • All of these inspections are true and correct
  • Make sure manhole covers and vents have gaskets and that they close correctly
  • Check pipes, connections and hoses for leaks
  • Make sure intake, discharge, and cut-off valves are in the correct position before loading, unloading or moving the vehicle
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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When loading a tank, you should:
  • Expect liquid to evaporate and lighten your gross weight over time
  • Always load a cargo tank with "filler" so that it's completely filled
  • Use disposable baffles and barriers when hauling food grade tankers
  • 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
Regarding stopping distance while driving a tanker, which statement is false?
  • 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
  • Wet roads double the normal stopping distance
  • All of these statements are true
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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Which statement below is false?
  • Liquid tankers are harder to stop in an emergency than other types of vehicles
  • Tanker vehicles have a higher center of gravity
  • Liquid tankers are easier to roll over
  • All tankers have baffle devices to limit sloshing of liquids
This is a question from page 60 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

Hauling liquids in tanks requires special skills because of the high center of gravity and liquid movement. A high center of gravity means that much of the load's weight is carried high up off the road. This makes the vehicle top-heavy and easy to roll over. Liquid tankers are especially easy to roll over. Tests how that tankers can turn over at the speed limits posted for curves. Take highway curves and on-ramp/off-ramp curves well below the posted speed limits.

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Next
While driving a liquid tanker around a curve, you should:
  • Be confident that your lower center of gravity will reduce the risk of a rollover
  • Always drive the posted speed for a curve
  • 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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How are bulkheads different than baffles?
  • Bulkheads are only used in gas tankers and baffles are only used in liquid tankers
  • Baffles are solid barriers in a tanks while bulkheads are barriers with holes in them, allowing liquid to flow through
  • 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
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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