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Guide for U3: U3-UST Tank Tightness Testing

Quiz U3: U3-UST Tank Tightness Testing

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/ 10

Quiz

1/10
Records and Reporting
Under the 1988 federal UST technical standards, how long must the owner or operator keep the results of release detection sampling, testing, or monitoring?
Select the answer
1 correct answer
A.
At least 6 months
B.
At least 1 year
C.
At least 3 years
D.
At least 10 years

Quiz

2/10
Site Preparation / Layout
When scheduling a tank tightness test, which information is most important to request from the owner before mobilizing to the site?
Select the answer
1 correct answer
A.
Only the street address, since everything else is checked on site
B.
Only the brand and model of the automatic tank gauge
C.
Only the invoice from the most recent fuel delivery
D.
Tank capacity, material, age, product, piping layout, and tank charts

Quiz

3/10
Placement of Equipment
When inserting a level and temperature probe through a tank opening, how should it be positioned?
Select the answer
1 correct answer
A.
Resting firmly on the tank bottom for stability
B.
Tied against the drop tube to keep it from swinging
C.
Suspended plumb, clear of the drop tube and the tank bottom
D.
Angled toward the tank end so it can measure end deflection

Quiz

4/10
Secondary Containment
A liquid sensor installed in the interstitial space of a double-wall tank goes into alarm. What does this most likely indicate?
Select the answer
1 correct answer
A.
Liquid entered the interstice through a breach in either wall
B.
The tank has been overfilled and product is backing up in the fill pipe
C.
The tank's product level has dropped below the sensor's set point
D.
The sensor is reporting normal condensation that can be ignored

Quiz

5/10
Vapor Recovery Systems
Which statement correctly describes Stage I vapor recovery at a motor fuel dispensing facility?
Select the answer
1 correct answer
A.
It captures vapors from vehicle tanks during customer refueling
B.
It captures vapors displaced from the UST during cargo tank delivery
C.
It captures vapors only from the dispenser sump during maintenance
D.
It captures vapors from the cargo tank as it is loaded at the terminal

Quiz

6/10
Test Variables & Leak Detection
Under the federal UST technical standards, what performance must a tank tightness test method be capable of achieving?
Select the answer
1 correct answer
A.
Detect a 0.2 gal/h leak rate with a probability of detection of 0.95 and a probability of false alarm of 0.05
B.
Detect a 0.05 gal/h leak rate with a probability of detection of 0.99 and a probability of false alarm of 0.01
C.
Detect a 0.1 gal/h leak rate with a probability of detection of 0.95 and a probability of false alarm of 0.05
D.
Detect a 1.0 gal/h leak rate with a probability of detection of 0.90 and a probability of false alarm of 0.10

Quiz

7/10
Testing of Piping Systems
A service station has underground pressurized piping fed by a submersible turbine pump. Under the federal UST technical standards, which combination of release detection satisfies the requirement for this piping?
Select the answer
1 correct answer
A.
Monthly inventory control and a line tightness test every 3 years
B.
An automatic line leak detector alone, functionally tested every 3 years
C.
A line tightness test every 3 years with no line leak detector installed
D.
An automatic line leak detector plus an annual line tightness test

Quiz

8/10
Volumetric Tank Tightness Testing
In an overfilled volumetric tank tightness test, the technician fills the tank until the product level rises into the fill pipe or an attached standpipe. What is the main measurement reason for doing this?
Select the answer
1 correct answer
A.
It removes the need to correct the data for product temperature changes
B.
It keeps the product in contact with the tank top so evaporation is increased
C.
It lets the test be run without stopping deliveries or dispensing at the site
D.
A small volume change produces a large, easily measured change in level

Quiz

9/10
Nonvolumetric Tightness Testing
How does a tracer (chemical marker) tank tightness test detect a leak?
Select the answer
1 correct answer
A.
A tracer added to the product is sampled for in soil gas from probes near the tank
B.
A tracer gas is pumped into the ullage and its pressure decay is timed with a gauge
C.
A dye is added to the product and the tank interior is inspected with a camera
D.
A tracer is added to groundwater wells and later measured in the tank bottom water

Quiz

10/10
Health and Safety for UST Workers
Which range of vapor concentrations in air, by volume, is generally accepted as the flammable range for gasoline vapor?
Select the answer
1 correct answer
A.
About 1.4 percent to about 7.6 percent
B.
About 0.5 percent to about 3.0 percent
C.
About 5.0 percent to about 15.0 percent
D.
About 10 percent to about 40 percent
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  • Quiz name:U3: U3-UST Tank Tightness Testing
  • Total number of questions:331
  • Number of questions for the test:50
  • Pass score:80%

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