Civil Engineering - Building Materials

26. 

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

A. 5 kg/mm2
B. 9 kg/mm2
C. 13 kg/mm2
D. 15 kg/mm2
E. 10 kg/mm2.

Answer: Option B

Explanation:

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27. 

Asbestos

A. is an excellant insulator for heat and electricity
B. is fire-proof and acid proof
C. has sp. gravity equal to 3.10
D. is smooth like glass and silk
E. All the above.

Answer: Option E

Explanation:

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28. 

Mild steel is used for

A. structural works in beams, joints and girders
B. small sized water pipes
C. columns and struts
D. none of these.

Answer: Option A

Explanation:

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29. 

The sequence of refractory materials according to increasing melting points is :

A. Dolomite, Magnesia, Bauxite, Chromite
B. Bauxite, Chromite, Dolomite, Magnesia
C. Magnesia, Bauxite, Dolomite, Chromite.

Answer: Option B

Explanation:

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30. 

Veneering means

A. carving out designs on timber planks
B. chemically treating timber planks
C. thick layer of superior wood glued to inferior wood
D. thin layer of superior wood glued to inferior wood.

Answer: Option C

Explanation:

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