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Tankers Free CDL Practice Tests
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Prepare For The Tankers Portion Of Your CDL Written Exams

Tankers Questions

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A tank endorsement is required for portable tanks with a capacity of:
  • Less than 1,000 gallons
  • Any amount
  • Over 10,000 gallons
  • Over 1,000 gallons
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From The 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.

Next
Tank vehicles must be purged of hazardous materials how far in advance of being inspected and tested, with documentation?
  • 7 days
  • 24 hours
  • It doesn't matter
  • 48 hours
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From The CDL Manual

Vehicles must be purged of hazardous materials 48 hours prior to testing with documentation verifying the purge.

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The most important thing to check for on tank vehicles is:
  • Leaks
  • Tire pressure
  • Electric lighting
  • Adequate ventilation
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From The 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.

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Manhole covers specifically need to have:
  • Screws
  • Latches
  • Air holes
  • Gaskets
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From The CDL Manual

Manhole covers and vents. Make sure covers have gaskets and that they close correctly. Keep vents clear so they work correctly.

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What should specifically be checked for leaks on a tank vehicle?
  • Connections and joints
  • Pipes and hoses
  • All of these things
  • The body or shell
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From The CDL Manual

In general, check the following:

Tank body or shell for dents or leaks.

Pipes, connections and hoses for leaks, especially around joints.

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All of these things apply to inspecting tank vehicles except:
  • Make sure that you are carrying the required equipment and it is working
  • Check the emergency equipment for your vehicle
  • Know how to operate special equipment
  • Emergency equipment is optional if there is no room for it
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From The CDL Manual

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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Tank vehicles are more likely to roll over because of liquid movement and:
  • High downhill speed
  • Heavy traffic
  • A higher center of gravity
  • Strong winds
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From The CDL Manual

High Center of Gravity —

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 show 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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When driving a loaded tank vehicle, you should take curves:
  • Below posted speed limits
  • Above posted speed limits
  • At posted speed limits
  • As fast as you feel is comfortable
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From The CDL Manual

High Center of Gravity —

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 show 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
The movement of liquid in partially filled tanks is referred to as:
  • Liquid surge
  • Tidal wave
  • Shock wave
  • Liquid wave
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From The CDL Manual

Liquid Surge —

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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All of the following are dangers of liquid surge except:
  • The wave can shove a stopped truck out into an intersection
  • Handling is diminished, especially in slippery conditions
  • Increased risk of overheating in rainy conditions
  • The wave will push a truck in the direction it is moving
Click here to look up the answer

From The CDL Manual

Liquid Surge —

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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