Sample Test – CQA Solutions

1. A portable generator, such as the one pictured here, is likely sufficient enough for properly running a thermal fusion or extrusion welding apparatus.*

TRUE
FALSE

2. A “tensiometer” is a device used to:*

quickly take soil density readings to determine if your nuke gauge is reading properly.
measure tensile properties of geosynthetics.
used to determine when arguments between you and the contractor are getting too tense.
determine the proper tension on the geosynthetic panel during installation to avoid “waves” later in the day when the material heats up and expands.

3. Non-destructive testing is most commonly used to:*

test the strength of a geomembrane seam.
test soil density without creating a hole (ie. Backscatter Test).
test the continuity of a geomembrane seam.
test the strength of a geosynthetic sample in a lab under ASTM specifications.

4. The primary role of QA/QC is to provide complete documentation.*

TRUE
FALSE

5. The current industry standard regarding scratches in geomembrane is to repair any scratch which has a depth of _____% or greater of the base sheet thickness.*

6. Material failing conformance tests should be: (Select ALL that apply.)*

marked by QA/QC in such a manner to distinguish it from acceptable material.
stockpiled in a separate location than acceptable material.
be the first material installed.
used only for repairs.
used only for closure projects.

7. Which of the following will help in successfully managing the geomembrane deployment process and data? (Select ALL that apply.)*

securing and storing identification tags
obtaining weather measurements on a regular basis
observing the trial welds on a regular basis
observing repairs as they are being performed
re-walking the panels in the morning while they are in a compressed condition

8. The installer has 4 lengths of 12 gauge extension cord, each 200 feet in length, for a total of 800 feet, powering an extrusion welder from a large generator. Having a questioning mindset, you have checked the CQA Plans and Specifications and found no information regarding extension cords. The next best source to refer to would be the:*

Equipment Manufacturer.
Design Engineer.
Certifying Engineer.
Installation Foreman.
No source is required – if not specified, all lengths and gauges of cord are acceptable

9. The installation test specialist is preparing for trial seams, but does not have a coupon cutter. The specialist chooses to hand cut the coupons. You notice they are varying widths. The specification calls for a minimum of 90 PPI to pass, with no peel allowed. You observe the coupon and there is no peel. The value on the Tensiometer was 92 PPI. You pull out your scale and measure the coupon—it measures 72 60th’s (72 on the 60 scale). Does this coupon pass?*

Yes, because the initial poundage exceeded the specified passing value criteria.
Yes, because the poundage adjusted for the coupon width is 115 PPI.
No, because the poundage adjusted for the coupon width is 76.7 PPI.
Yes, because there was no peel incursion.

10. What is the appropriate repair method for the liner in this photograph?*

cut out the damage and patch
patch
grind
cap

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