218. Cast iron contains carbon approximately
A. 15% to 5.5%
B. 0.05% to 1.75%
C.0.25%
D. none to these.

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219. Steel contains carbon approximately
A. 1.50% to 5.6%
B. 0.05% to 1.75%
C.0.25%
D. none to these.

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220. Wrought iron contains carbon about
A. 1.5% to 5.5%
B. 0.5% to 1.75%
C.0.25%
D. none to these.

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221. Pick up the correct statement from the following :
A. Solder material is an alloy which melts at a temperature above 400?C
B. Brazing is done at temperature above 600?C to 1100?C
C. Brazing joint is stronger than the solder joint
D. all the above.,

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222. Pick up the correct statement from the following :
A. Corrugated-sheet iron is made by passing plain sheets between grooved rollers
B. Strength and stiffness of corrugated sheets are considerably increased
C. Corrugated sheets are generally galvenised to protect
D. all the above.

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223. Expanded metal is
A. manufactured from steel sheets
B. used for reinforced concrete in road pavements
C. measured in term of SWM (shortway mesh) and LWM (long way mesh)
D. all the above.

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224.  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.

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