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CDL Practice Test: Tankers

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CDL Practice Test: Tankers

Tankers Questions

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Good Luck!

Which statement about liquid surge is true?
  • Liquid surge will not affect handling and will only affect braking or acceleration
  • 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
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.

Next
All of the following tanker-specific inspections are correct, except:
  • Make sure manhole covers and vents have gaskets and that they close correctly
  • All of these inspections are true and correct
  • 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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Next
Which statement below is false?
  • Liquid tankers are easier to roll over
  • All tankers have baffle devices to limit sloshing of liquids
  • Liquid tankers are harder to stop in an emergency than other types of vehicles
  • 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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Next
All of the following require a Tanker endorsement, except:
  • Portable tanks with a rated capacity of less than 1,000 gallons
  • Tank that is permanently attached to the vehicle chassis
  • Large tanks of more than 1,000 gallons enclosed in a box trailer
  • 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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Next
All of the following statements about Liquid Surge are correct, except:
  • When coming to a stop, the liquid will surge back and forth
  • When the surge hits the end of the tank, it tends to push the truck in the opposite direction the wave is moving
  • Results from movement of the liquid in partially filled tanks
  • If the truck is on a slippery surface such as ice, the wave can shove a stopped truck out into an intersection
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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Next
Why do liquid tankers need to be driven more smoothly than most other vehicles?
  • During turns, liquid will surge to the side of the trailer, increasing the chance of a rollover accident
  • All of these are correct
  • Quick acceleration will cause unnecessary sloshing and control difficulties
  • While stopping, liquid will slosh back and forth
This is a question from page 61 - click here to look up the answer

Quote From Page 85 Of The Illinois CDL Manual:

In order to drive tank vehicles safely, remember:

  • Drive smoothly - Because of the high center of gravity and the surge of the liquid, you must start, slow down and stop very smoothly. Also, make smooth turns and lane changes.
  • Braking - If you must make a quick stop to avoid an accident, use controlled or stab braking. Also, remember that if you steer quickly while braking, your vehicle may roll over.
  • 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.
  • 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.
  • Skids - Do not over steer, over accelerate or over brake. If you do, your vehicle may skid. On tank trailers, if your drive wheels or trailer wheels begin to skid, your vehicle may jackknife. When any vehicle starts to skid, you must take action to restore traction to the wheels.
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Next
The amount of liquid to load into a tank depends on:
  • All of these should be taken into consideration when loading liquid into a tank
  • Legal weight limits
  • The amount the liquid will expand in transit (outage)
  • 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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Next
What is Liquid Surge?
  • 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
  • When liquid naturally swirls inside of a tank
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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