| 1. | Spirit varnish consists of ? | |
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spirit and wax
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spirit and shellac
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turpentine, spirit and wax
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turpentine, spirit and shellac
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Report Question| 2. | The colour of granite is ? | |
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grey
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green
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brown
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all of these
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| 3. | When quarrying is to be done in hard stone and compact rocks, the usual method of quarrying ? | |
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by wedging
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by channelling machine
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by blasting
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all of these
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| 4. | Efflorescence is caused if ? | |
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the alkaline salt is present in the bricks
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the clay used for making bricks contain pyrite
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the water used for pugging the clay contains gypsum
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all of the above
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| 5. | The dry process of mixing is usually employed in the manufacture of Portland cement when the raw material is ? | |
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blast furnace slag
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chalk
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clay
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all of these
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| 6. | Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning ? | |
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Alumina
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Silica
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Lime
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Alkalies
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| 7. | The fuel generally used for burning limestone is ? | |
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coal
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charcoal
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firewood
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any one of these
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| 8. | The silicious sandstone which has been subjected to metamorphic action, is called ? | |
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moorum
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laterite
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quartzite
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dolomite
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| 9. | The length of a curved tile varies from ? | |
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10 to 12 cm
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12 to 15 cm
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15 to 20 cm
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20 to 22.5 cm
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| 10. | The rapid hardening Portland cement is obtained by ? | |
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grinding the clinker to a high degree of fineness
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adding calcium sulphate to the mixture
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adding gypsum after grinding
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burning the mixture at a lower temperature
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