Building Materials MCQ Civil Engineering Questions Answers


11) The sand in mortar

(a) prevents shrinkage

(b) spreads mortar

(c) allows carbon dioxide from the atmosphere to penetrate deeply

(d) all the above

View Answer
Option – d)

12) The approximate proportion of dry cement mortar required for brickwork is

a) 60%

b) 45%

c) 30%

d) 10%

View Answer
Option – c)

13) The compound responsible for initial setting of cement is

(a) Tricalcium aluminate

(b) Tricalcium silicate

(c) Dicalcium silicate

(d) Tetra alumino ferrite

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Option – a)

14) Plaster of paris is obtained by calcining

a) gypsum

b) bauxite

c) lime stone

d) kanker

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Option – a)

15) The fuel generally used for burning lime stone is

(a) firewood

(b) charcoal

(c) coal

(d) any one of these

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Option – a)

16) Initial setting time of concrete ceases at

a) -100C

b) -40C

c) 00C

d) 40C

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Option – c)

17) Which one of the following statement is correct?

(a) Fat lime contains hardly 5% clay

(b) Hydraulic lime contains 5.30% clay

(c) Poor lime contains more than 30% clay

(d) All the above

View Answer
Option – a)

18) Which one of the following does not react with concrete ?

a) Sewage water

b) Sulphuric acid

c) Vegetable oil

d) Alcohol

View Answer
Option – d)

19) The heaviest metal is

(a) steel

(b) lead

(c) tin

(d) cast iron

View Answer
Option – b)

20) For a RCC slab the slump of concrete should be

a) 0-25 mm

b) 25-50 mm

c) 75-100 mm

d) 50-125 mm

View Answer
Option – c)