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Building Materials

Building Materials
Invar contains

12% of nickel
24% of nickel
36% of nickel
30% of nickel

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Building Materials
Bulking of sand is caused due to

Viscosity
Surface moisture
Air voids
Clay contents

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Building Materials
Brass is an alloy of

Copper and zinc
Zinc and lead
Tin and silver
Zinc and nickel

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Building Materials
Sea sand used in structures causes

All of these
Disintegration
Dampness
Efflorescence

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Building Materials
The slump recommended for mass concrete is about

125 mm to 150 mm
50 mm to 100 mm
25 mm to 50 mm
100 mm to 125 mm

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Building Materials
Which of the following gradients exerts maximum influence on properties of steel?

carbon
manganese
iron
sulphur

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