CFI Moisture Testing & Environmental Conditions

Question 1

Which ASTM standard test method is used to measure moisture vapor emission rate (MVER) from a concrete slab?

Accepted Answer

ASTM F1869

Answer

ASTM F2170

Answer

ASTM D4263

Answer

ASTM E741

Question 2

What unit of measurement does the ASTM F1869 calcium chloride test express moisture vapor emission in?

Accepted Answer

Pounds per 1,000 sq ft per 24 hours

Answer

Grams per meter squared per day

Answer

Relative humidity percentage

Answer

Grains per hour

Question 3

What maximum MVER do most flooring adhesive manufacturers specify for concrete slab installations?

Accepted Answer

3 lbs per 1,000 sq ft/24 hrs

Answer

10 lbs per 1,000 sq ft/24 hrs

Answer

6 lbs per 1,000 sq ft/24 hrs

Answer

1 lb per 1,000 sq ft/24 hrs

Question 4

What does the ASTM F2170 test method measure in a concrete slab?

Accepted Answer

Relative humidity (RH) within the slab using an in-situ probe

Answer

Surface moisture emission rate

Answer

Slab pH level

Answer

Concrete compressive strength

Question 5

At what depth within the concrete slab are F2170 RH probes typically installed?

Accepted Answer

40% of slab depth for slabs drying from one side

Answer

At the surface only

Answer

At the very center always

Answer

2 inches from the top regardless of thickness

Question 6

What maximum relative humidity reading does ASTM F2170 allow for most standard adhesive-set flooring installations?

Accepted Answer

75% RH

Answer

90% RH

Answer

60% RH

Answer

85% RH