Civil Engineering - Building Materials

36. 

Pick up the correct statement from the following:

A. Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
B. Cupola furnace is used for the manufacture of cast iron
C. Red short iron is of no value for welding purpose
D. All the above.

Answer: Option D

Explanation:

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37. 

The steel used for the manufacture of rails, is

A. Bessemer steel
B. mild steel
C. cast steel
D. stainless steel.

Answer: Option A

Explanation:

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38. 

Slump test for concrete is carried out, to determine

A. strength
B. durability
C. workability
D. water content.

Answer: Option C

Explanation:

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39. 

Basalt is

A. sedimentary rock
B. metamorphic rock
C. extrusive igneous rock
D. intrusive igneous rock.

Answer: Option C

Explanation:

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40. 

The frog of a brick is normally made on its

A. top face
B. bottom face
C. longer face
D. shorter side.

Answer: Option A

Explanation:

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