Ch.13 CM1112 Questions with Detailed Verified Answers

Ch.13 CM1112 Questions with Detailed Verified
Answers
Compressive strength tests require: (Section 3.14.5)

Select one:

a. One set for each day's pour exceeding 5 CY

b. Two specimens tested at 28 days

c. One specimen retained in reserve for later testing

d. All of above Ans: d. all the above

Formwork not supporting weight of concrete can be removed: (Section 3.10)




Select one:

a. 4 days after placement

b. After 24 hours

c. Must become part of the structure

d. After 28 days Ans: b. after 24 hours

How deep are the keyways placed in the walls and slabs? (Section 3.3)

,Select one:

a. 1"

b. 1 ½"

c. 3"

d. 2 ½" Ans: b. 1 1/2''

Membrane curing compounds are not allowed on surfaces which are to be covered
with coating material applied directly to concrete: (Section 3.9.H)

Select one:

True

False Ans: True

Owner shall pay for all failed tests: (Section 3.14.A)

Select one:

True

False Ans: false

Which of the following is not affected by the addition of water to a concrete mix?

Select one:


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, a. Cost of the concrete to the customer

b. The ease of placing the concrete by the masons and laborers

c. Compressive strength

d. Workability Ans: a. cost of the concrete to the customer

The slump test provides a rough measure of the _______ of concrete while wet

Select one:

a. workability

b. compressive strength

c. plasticity

d. elasticity

e. All the above Ans: workability

Stirrups are:

Select one:

a. pre-bent shear rebars

b. hooks to hoist concrete into position



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