Building Materials

191. The commonly used lime in white washing, is

1. White lime
2. Fat lime
3. Hydraulic lime
4. Quick lime

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192. For slaking of 10 kg of CaO, the theoretical amount of water is

1. 2.2 kg
2. 1.5 kg
3. 3.2 kg
4. None of these

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193. Plywood is made from

1. Common timber
2. Bamboo fibre
3. Teak wood only
4. Asbestos sheets

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194. A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

1. 10%
2. 15%
3. 20%
4. 25%

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195. The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

1. Quarrying of stones
2. Blasting of stones
3. Seasoning of stones
4. Dressing of stones

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196. The hardest rock is

1. Marble
2. Diamond
3. Talc
4. Quartz

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197. Wrought iron is used for

1. Structural works in beams
2. Small sized water pipes
3. Columns and struts
4. None to these

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198. Pick up the correct statement from the following:

1. Corrugated sheet iron is made by passing plain sheets between grooved rollers
2. Strength and stiffness of corrugated sheets are considerably increased
3. Corrugated sheets are generally used on slanting roofs
4. All the above

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199. The process of mixing clay, water and other ingredients to make brick is known as

1. Kneading
2. Moulding
3. Pugging
4. Drying

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200. The type of steel used for precision levelling staff, is

1. Titanium steel
2. Carbon steel
3. Invar
4. Stainless steel

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