Soil Testing ch.4

The sand cone test is a relatively new test method.

• True

• .False

The depth of the hole dug for a sand cone test (ASTM D1556) should be:

• 2 to 4 in.

• 6 to 8 in.

• 10 to 12 in.

• .None of the above

After the sand has stopped flowing, but just before removing the cone from the plate, you should tap the cone and jar.

• .True

• False

The neutron source in the nuclear gauge is depleted uranium (uranium-238) and is relatively harmless.

• True

• .False

A sand cone test can be taken on a sloping surface.

• True

• .False

A nuclear density test can be performed on a sloped surface.

• .True

• False

As long as the nuclear gauge is locked in its storage box in the rear of a pick-up truck, it is OK to sit on the tailgate near the gauge.

• True

• .False

Which of the following soils, or test situations, may bias or cause the gauge to give an inaccurate moisture result?

• When testing gypsumiferous soil

• When testing diatomaceous soil

• When testing backfill in a 30-in-wide trench

• .All of the above

• None of the above