Question

1. CMU are manufactured by their nominal dimensions but designated by their actual dimensions

1. True
2. False

l) Control joints are considered joints that will _______shortening, shrinkage and/or reduction in the length of the wall.

A. Coordinate

B. Accommodate

C. Reduce

D. Contro

m) Movements can occur from a number of sources, such as _________.

A. Ground settlement

B. Material expansion and contraction

C. Seismic activity

D. All of the above

Answer 1

Answer (a) - TRUE

CMU are designated by their actual dimensions and manufactured by their nominal dimensions.

Nominal dimension = actual dimension plus the thickness of the joint.

Answer (l) - OPTION (D)

Control joints will control the cracks which occur due to shrinkage. So they are provided to reduce to the crack width and control the crack length.

Answer ( m ) OPTION - (D)

all of the above options are correct because movement can occur by ground settlement, material expansion or contraction and also due to seismic activity.