Question

which tool is used to create control joints in fresh concrete? *
a. groover
b. trowel
c. float
d. hammer

in a 1-2-3 concrete mix, what does the \2\ represent? *
a. water
b. cement
c. fine aggregate (sand)
d. coarse aggregate (gravel)

what is the purpose of control joints in concrete? *
a. to make concrete stronger
b. to give you a place to break your moms back
c. to control where concrete cracks

Explanation:

1. For the first question: A groover is specifically designed to cut control joints in fresh concrete, while trowels/floats finish surfaces and hammers are for breaking concrete.
2. For the second question: The 1-2-3 concrete mix ratio is 1 part cement, 2 parts fine aggregate (sand), 3 parts coarse aggregate (gravel), with water added separately.
3. For the third question: Control joints create intentional weak points to direct concrete cracking to a planned location, preventing random, unsightly cracks from shrinkage.

Answer:

1. A. Groover
2. C. Fine aggregate (sand)
3. C. To control where concrete cracks