2026\2027 A+ Grade
What is Bulk Density used for? (c29)
- correct answer Determining Mass/volume relationship for conversions in purchase agreements
What is the dimensions of plate glass? (C29)
- correct answer 1/4" thick and at least 1" larger than the diameter of the measure
What are the requirements for a thermometer? (C1064)
- correct answer has a range of at least 30-120°F and readable to the nearest 1°F
When drying aggregate to constant mass, What should the temperature of the oven be? (C29)
- correct answer 230°F (+/- 10°F)
When is an aggregate sample considered at constant mass? (C29)
- correct answer When the 2 sample weights taken an hour apart is less than .1%
What is the formula for Bulk Density? (C29)
- correct answer (mass of agg. and measure - mass of measure) /volume of measure
What is is maximum size to use the jigging procedure? (C29*)
- correct answer Greater than 1.5", but no greater than 5"
What is the formula for void content? (C29)
- correct answer 100[(bulk specific gravity X density of water) - Bulk Density of agg./ bulk specific gravity
X density of water
, bulk density be reported to the nearest.... (C29)
- correct answer 1 LB/ft^3
What is the significance of ASTM C31?
- correct answer It provides the requirements for making, curing, protecting and transporting concrete
specimens
If specimens are made and standard cured what can the test results be used for? (C31)
- correct answer -Acceptances for specific strength
-checking adequacy of mixture proportions
- Quality Control
if specimens are field cured what can the test results be used for? (C31)
- correct answer -Determine if a structure can be put in service
-comparison with test results of standard cure specimens
-form removal time requirements
What are the specifications of a tamping rod?
- correct answer A round, smooth, straight, steel rod. The length should be at least 4" greater than the
depth of the mold, but no greater than 24"
When using the a 4"x 8" cylinder, What are the rod specifications?
- correct answer straight, steel, w/hemispherical tip 3/8" in diameter (+-1/16")
When using a 6" x 12" cylinder, What are the rod specifications?
- correct answer straight, steel w/hemispherical tip 5/8" in diameter (+-1/16)
What is the minimum amount of cylinders per test?***
- correct answer 3-4"x8"
2-6"x12"