Pick up the correct statement from the following: Blistering may be cured by app

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Question
Pick up the correct statement from the following:
Options
A. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
B. Cracked paints may be cured by removing paint and giving a fresh coat of paint
C. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
D. All the above.

Correct Answer

All the above.

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3. Pick up the correct statement from the following:
Options
A. Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
B. The edges of a finished wrought iron, are rough due to red shortage
C. Pig iron (charcoal) is manufactured from magnetic ore (Fe₃O₄)
D. For the manufacture of wrought iron, non-sulphurous fuel is not necessary
E. All the above.

6. Pick up the compound responsible for early strength of cement from the following:
Options
A. Tetra-calcium alumino-ferrite
B. Tricalcium silicate
C. Tricalcium aluminate
D. Dicalcium silicate.

7. Pick up the correct statement from the following:
Options
A. Melamine is obtained from calcium carbide
B. Formaldehyde is prepared synthetically from methane
C. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
D. The plastics made from melamine formaldehyde resin, are used for electrical insulators
E. All the above.

10. Pick up the correct statement from the following:
Options
A. Roasting is not necessary if iron ore is an oxide
B. Impurities float on the molten iron as slag
C. The slag contains lime about 45%
D. The molten iron is made to run, in a long channel formed in sand called 'sow'
E. All the above.

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