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Materials and Construction

Materials and Construction
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.

1.5-2
44179
44021
3.5-4.5

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Materials and Construction
In cold working of metal as compared to its hot working

Appreciable strain hardening is produced
Cracks and blow holes are eliminated
Yield stress, hardness and fatigue strength is not at all affected
Ductility and impact strength improves

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Materials and Construction
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?

Phosphorus
Sulphur
None of these
Silicon

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Materials and Construction
An alloy used as thermocouple material comprises of 40% nickel and 60% copper.

Kanthal
German silver
Constantan
Chromel

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Materials and Construction
Cast iron and steel pipes are produced by __________ casting.

True centrifugal
Slush
Investment
Die

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Materials and Construction
Stainless steel is not corroded by

Nitric acid (10%)
Saturated brine
Hydrochloric acid (10%)
Sulphuric acid (10%)

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