1131. The cement concrete prepared by mixing aluminium in it is called :

A. Air-entrained concrete
B. Cellular concrete
C. Aerated concrete
D. Any of the above *

1132. The light-weight concrete is prepared by :

A. Mixing portland cement with sawdust in specific proportion in the concrete
B. Using coke-breeze,cinder or slag as aggregate in the concrete *
C. Mixing aluminium in the concrete
D. None of the above

1133. In making precast structural units for partition and wall lining purposes, the concrete should be :

A. Sawdust concrete
B. Air-entrained concrete
C. Light-weight concrete *
D. Vacuum concrete

1134. Cement concrete is __________ to moisture :

A. Permeable
B. Impermeable *

1135. Which of the following statement is wrong ?

A. The concrete can not be pumped
B. The concrete should have maximum creep
C. All of the above
D. None of the above *

1136. The characteristic, which makes the concrete a versatile and widely used material of modern construction , is the possibility of :

A. Controlling the properties of concrete by using appropriate ingredients
B. Moulding the concrete in any desired shape
C. Complete mechanisation of concrete preparation and its placing process
D. All of the above *

1137. The concrete without any reinforcement has ___________ tensile strength :

A. Low *
B. High

1138. Segregation of concrete increases the strenght of concrete :

A. Yes *
B. No

1139. The material used as an ingredient of concrete is usually :

A. Cement
B. Aggregate
C. Water
D. Admixture
E. All of the above *

1140. A suitable admixture added at the time of preparing the concrete mix, makes the concrete :

A. Water proof
B. Acid proof
C. Highly strong
D. All of the above