Concrete Technology MCQs

Question 1

Gypsum is added for

Accepted Answer

controlling setting time

Answer

colour

Answer

strength

Answer

none of these

Question 2

The aggregate impact value of the aggregate used in

Accepted Answer

all the above

Answer

building concrete is less than 45

Answer

road pavement concrete is less than 30

Answer

runway concrete is less than 30

Question 3

The void ratio of

Accepted Answer

all the above

Answer

single size coarse aggregate is roughly 045

Answer

graded coarse aggregate is roughly 0040

Answer

fine aggregate is roughly 045

Question 4

Workability of concrete may be improved by adding

Accepted Answer

all the above

Answer

fly ash

Answer

hydrated lime

Answer

calcium chloride

Question 5

Workability of concrete may be improved by adding

Accepted Answer

all the above

Answer

air-entraining agent

Answer

foaming agent

Answer

oily-agent

Question 6

The shrinkage of concrete

Accepted Answer

all the above

Answer

is proportional to water content is the mix

Answer

is proportional to cement concrete

Answer

increases with age of concrete

Question 7

Addition of pozzolana to cement causes

Accepted Answer

all the above

Answer

reduction in permeability

Answer

loss of heat of hydration

Answer

reduction in bleeding

Question 8

For a good concrete

Accepted Answer

All the above

Answer

aggrcgates should be hard and durable

Answer

cement should be sufficient to produce the required strength

Answer

water should be free from organic materials

Question 9

Cement used for normal concrete construction, is obtained by burning a mixture of

Accepted Answer

silicious, argillaceous and calcareous materials

Answer

silicious and argillaceous materials

Answer

argilaceous and calcareous materials

Answer

silicious and catcareous materials