1. | Epoxy resin is a polymer containing two or more following groups called epoxide group or ethoxyline group. It is a
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a. | polyamide & an elastomer. |
b. | good adhesive. |
c. | surface coating agent. |
d. | both (b) and (c). |
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Answer: (d).both (b) and (c).
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2. | Epoxy resins (i.e., epoxide polymers)
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a. | A |
b. | B |
c. | C |
d. | D |
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Answer: (b).B
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3. | Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, because of its |
a. | non-wetting characteristic. |
b. | high thermal conductivity. |
c. | high crushing strength. |
d. | none of these. |
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Answer: (a).non-wetting characteristic.
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4. | Firing temperature of magnesite bricks is about __________ °C. |
a. | 800-1000 |
b. | 1000-1200 |
c. | 1600-1800 |
d. | 2400-2600 |
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Answer: (c).1600-1800
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5. | Hollow refractory bricks are made by |
a. | slip casting |
b. | hand moulding |
c. | pressing/machine moulding |
d. | extrusion |
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Answer: (a).slip casting
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