Question

Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that

a.

cooling produces tension on the surface.

b.

cooling produces compression on the surface.

c.

heating does not produces any thermal stress.

d.

heating produces compression on the surface.

Answer: (a).cooling produces tension on the surface.

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Q. Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that

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