As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?

i. sedimentary rock
ii. aqueous rock
iii. silicious rock
The correct answer is:
A. only (i)
B. both (i) and (ii)
C. both (i) and (iii)
D. all (i), (ii) and (iii)

A. cracking and warg of bricks
B. loss of cohesion
C. enhancing the impermeability of bricks
D. none of the above

A. segmental arch
B. pointed arch
C. relieving arch
D. flat arch

A. 400
B. 450
C. 500
D. 550

A. 1
B. 2
C. 3
D. 4