Civil Engineering - Building Materials

6. 

Pick up the correct statement from the following:

A. The free quartz suddenly expands at a temperature lower than 600°C
B. The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
C. The sand stone with silicates resist a fire in a better way
D. The argillaceous stone though poor in strength can resist fire quite weak
E. All the above.

Answer: Option E

Explanation:

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7. 

The most commonly used base for timber painting, is

A. red lead
B. zinc white
C. white lead
D. titanium white.

Answer: Option C

Explanation:

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8. 

Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following:

A. absence of sun light
B. dampness
C. presence of sap
D. stagnant air
E. All the above,

Answer: Option E

Explanation:

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9. 

The rocks formed from molten magma, are called

A. sedimentary rocks
B. igneous rocks
C. metamorphic rocks
D. none of these.

Answer: Option B

Explanation:

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10. 

Bitumen paints offer

A. pleasing surface
B. hard surface
C. smooth surface
D. protective surface
E. rough surface.

Answer: Option D

Explanation:

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