Building Materials

311. According to ISI, bitumen is classified into

1. 2 grades
2. 4 grades
3. 8 grades
4. 10 grades

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312. Basalt is

1. Sedimentary rock
2. Metamorphic rock
3. Extrusive igneous rock
4. Intrusive igneous rock

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313. The size of mould for bricks, is generally kept

1. A little large to specified size
2. A little small to specified size
3. Equal to specified size
4. 10% larger than specified size

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314. For construction of structures under water, the type of lime used, is

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

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315. French polish is

1. Oil paint
2. Distemper
3. Spirit varnish
4. None to these

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316. Ultimate strength to cement is provided by

1. Tri-calcium silicate
2. Di-calcium silicate
3. Tri-calcium aluminate
4. Tetra calcium alumino ferrite

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317. Wrought iron contains carbon about

1. 1.5% to 5.5%
2. 0.5% to 1.75%
3. 0.1% to 0.25%
4. None to these

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318. Galvanising means covering iron with a thin coat of

1. Tin
2. Zinc
3. Glaze
4. Coal tar

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319. The rocks in which argil (or clay) predominates, are called

1. Siliceous rocks
2. Argillaceous rocks
3. Calcareous rocks
4. Igneous rocks

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320. Name the type of cement from the following for canal linings:

1. Sulphate resisting cement
2. Rapid hardening cement
3. Quick setting cement
4. Pozzolana cement

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