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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?
  • Tankers designed to haul non-liquid products
  • All tanker trucks are equipped with baffles
  • Food grade tankers
  • 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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Regarding stopping distance while driving a tanker, which statement is false?
  • All of these statements are true
  • Liquid surge may force your truck forward after you have already come to a complete stop
  • Wet roads double the normal stopping distance
  • 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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Which statement below is false?
  • Liquid tankers are easier to roll over
  • Liquid tankers are harder to stop in an emergency than other types of vehicles
  • All tankers have baffle devices to limit sloshing of liquids
  • Tanker vehicles have a higher center of gravity
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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All of the following require a Tanker endorsement, except:
  • Large tanks of more than 1,000 gallons enclosed in a box trailer
  • Tank that is permanently attached to the vehicle chassis
  • Portable tanks with a rated capacity of less than 1,000 gallons
  • Portable tank with a rated capacity of 10,000 gallons
This is a question from page 60 - click here to look up the answer

Quote From Page 84 Of The Illinois CDL Manual:

A "tank vehicle" is used to carry any liquid or gaseous material in a tank that is permanently or temporarily attached to the vehicle or chassis. However, this does not include portable tanks with a rated capacity of less than 1,000 gallons.

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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
  • Legal weight limits
  • The weight of the liquid
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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Why don't most food grade tankers come equipped with baffles?
  • Food products are generally light enough that the entire tank can be filled, thus, limiting any liquid surge
  • To save room in the tank, most shippers of liquid food products prefer to forgo baffles so more product can be loaded
  • Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank
  • Food grade tankers are required to be fitted with baffles or bulkheads
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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What is a Bulkhead?
  • 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
  • A divider inside a tank to section off liquid or gas
  • Used to elevate liquid to a higher 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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Which statement about liquid surge is true?
  • On tanker vehicles, brakes are designed to hold the vehicle in place when liquid surges forward
  • When liquid surge hits the end of the tank, it tends to push the truck in the direction the wave is moving
  • Liquid surge only occurs during acceleration or stopping and does not occur during turns
  • Liquid surge will not affect handling and will only affect braking or acceleration
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.

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