Building Materials

461. Pick up the metal refractory from the following:

1. Molybdenum
2. Tungsten
3. Zirconium
4. All of these

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462. With storage, strength of cement

1. Increases
2. Decreases
3. Remains the same
4. None to these

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463. The commonly used raw material in the manufacture of cement, is

1. Slate
2. Sand stone
3. Lime stone
4. Basalt

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464. The rocks formed from molten magma, are called

1. Sedimentary rocks
2. Igneous rocks
3. Metamorphic rocks
4. None of these

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465. Bitumen paints offer

1. Pleasing surface
2. Hard surface
3. Smooth surface
4. Protective surface

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466. Ground glass

1. Is made by grinding its one side
2. Is made by melting powdered glass paints surface
3. Is used for getting light without transparency
4. All the above

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467. The wedging is adopted for quarrying costly stratified rock such as

1. Laterite
2. Marble
3. Limestone
4. All the above

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468. The colour of statuary marble used for sculptor's work, is

1. Red
2. Blue
3. White
4. Green

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