Civil Engineering - Mock Test 11

Question 101

The alkaline salt present in the bricks, absorbs moisture from the air which on drying?

A) leaves pores and makes the bricks porous B) leaves high powder deposit on the brick C) makes the bricks brittle and weak D) all of these

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Question 102

Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning?

A) Alumina B) Silica C) Lime D) Alkalies

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Question 103

Excess of silica in the clay?

A) makes the brick brittle and weak B) makes the brick crack and wrap on drying C) changes the colour of the brick from red to yellow D) improves impermeability and durability of the brick

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Question 104

Excess pf alumina in the clay?

A) makes the brick brittle and weak B) makes the brick crack and warp on drying C) changes colour of the brick from red to yellow D) improves impermeability and durability of the brick

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Question 105

The percentage of silica in a good brick clay should vary from?

A) 20 to 30% B) 30 to 40% C) 40 to 50% D) 50 to 60%

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Question 106

The percentage of alumina in a good brick clay should vary from?

A) 20 to 30% B) 30 to 40% C) 40 to 50% D) 50 to 60%

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Question 107

A first class brick should have a minimum crushing strength of?

A) 7 MN/m2 B) 10.5 MN/m2 C) 12.5 MN/m2 D) 14 MN/m2

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Question 108

A first class brick should not absorb water more than?

A) 10% B) 15% C) 20% D) 25%

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Question 109

The attrition test on stones is performed?

A) to determine the crushing strength of the stone B) for assessing the resistance of stone to the sun, rain, wind et C) for determining the rate of wear of stone due to grinding action under traffic D) none of this

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Question 110

The crushing strength of a stone depends upon its?

A) texture B) specific gravity C) workability D) both a and b

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