Top 150+ Solved Basic of Civil Engineering MCQ Questions Answer

From 46 to 60 of 148

Q. Which one of the below is the most important ingredient in the brick earth?

a. Alumina

b. Lime

c. Silica

d. Magnesia

  • c. Silica

Q. In what form should lime be present in the brick earth?

a. Paste

b. Lump

c. Clinker

d. Powder

  • d. Powder

Q. Excess of oxides of iron makes the brick:

a. Red in colour

b. Black in colour

c. Dark blue in colour

d. Yellow in colour

  • c. Dark blue in colour

Q. What happens to raw bricks if an excess of alumina is present?

a. Becomes hard

b. Becomes brittle

c. Decay

d. Shrinkage

  • d. Shrinkage

Q. What is the harmful effect of presents of alkali in brick earth on bricks?

a. Discolourises bricks

b. Efflorescence

c. Porous bricks

d. Flaking

  • b. Efflorescence

Q. Why do bricks become brittle when excess silica is present?

a. Pores are created

b. Flaking occurs

c. Thermal stability is lost

d. Cohesion is lost

  • d. Cohesion is lost

Q. Which of the following leads to the formation of small pores in brick?

a. Iron pyrites

b. Pebbles

c. Organic matter

d. Alkalis

  • c. Organic matter

Q. Unburnt bricks are also called:

a. Dry bricks

b. Clayey bricks

c. Kucha bricks

d. Clamp bricks

  • c. Kucha bricks

Q. First class bricks are used for:

a. Brick ballast in R.C.C

b. Boundary walls

c. Low height walls

d. Pavements

  • d. Pavements

Q. The minimum crushing strength of third class brick is:

a. 3.5 N/mm2

b. 7 N/mm2

c. 10 N/mm2

d. 20 N/mm2

  • a. 3.5 N/mm2

Q. Which of the following is not a feature of second class bricks?

a. Have small irregularities

b. Water absorption is between 20-25%

c. Rectangular in shape

d. Free from cracks

  • b. Water absorption is between 20-25%
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