(a) To give bulk to concrete (b) To improve thermal property of concrete (c) To increase workability of concrete (d) To bind sand and aggregate together by the process known as hydration of cement. Answer: (d)

(a) cement + sand + aggregate + water +admixtures + air (b) cement + sand + aggregate + water +admixtures (c) cement + sand + aggregate + water (d) None of the above Answer: (a)

(a) Mortar (b) Paste (c) Slurry (d) None of the above Answer: (b)