Building Materials

241. Quartzite, a metamorphic stone is

1. Hard
2. Brittle
3. Crystalline
4. All the above

View answer

242. If water required for 1 bag of cement is 30 litres, the water cement ratio is:

1. 0.40
2. 0.50
3. 0.60
4. None of these

View answer

243. A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called

1. Slate
2. Plank
3. Board
4. Strip

View answer

244. The percentage of water for normal consistency, is

1. 5% to 15%
2. 10% to 25%
3. 15% to 25%
4. 20% to 30%

View answer

245. Pick up the correct statement from the following:

1. The baked earth is called terra-cotta
2. The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called earthen-ware
3. The articles prepared from refractory clays which as mixed with stone and crushed pottery, are called stone ware
4. All the above

View answer

246. In a rock calcium carbonate predominates. State whether it is:

1. Siliceous rock
2. Argillaceous rock
3. Calcareous rock
4. None of these

View answer

247. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called

1. Radial shakes
2. Star shakes
3. Heart shakes
4. Cup shakes

View answer

248. The steel used for rails under heavy traffic and on sharp curves, is

1. Nickel steel
2. Chrome steel
3. Manganese steel
4. Vanadium steel

View answer

249. The steel used in R.C.C. work is

1. Stainless steel
2. Mild steel
3. High carbon steel
4. Wrought iron

View answer

250. Pick up the rock which is not a sedimentary rock from the following:

1. Gravel
2. Sand stone
3. Gypsum
4. Dolerite

View answer