A. bottom face
B. top face
C. shorter side
D. longer side
A. gable roof
B. hip roof
C. gambrel roof
D. mansard roof
A. 5%
B. 15%
C. 25%
D. 35%
A. to increase the initial setting time of cement paste in concrete
B. to decrease the initial setting time of cement paste in concrete
C. to render the concrete more water tight
D. to improve the workability of concrete mix
A. arches require more headroom to span the openings like doors, windows etc.
B. arches require strong abutments to withstand arch thrust
C. arches are difficult in construction
D. all of the above
A. hard
B. tough
C. heavy
D. light
A. quartz
B. mica
C. gypsum
D. none of the above