MATERIALS AND CONSTRUCTION QUIZ

The crystal structure of most of the common metals is

None of these

Orthorhombic

Hexagonal

Cubic

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YOUR ANSWER : ?

Which of the following is the most widely used insulating material for steam carray-ing pipelines?

Vermiculite

Slag wool

Ceramic fibre blanket

Glass wool and 85% magnesia

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Which of the following is the lightest of engineering metals?

Aluminium

Magnesium

Titanium

Tin

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Steel pipes are normally manufactured by __________ process.

Electroforming

Forging

Cold working

Extrusion

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Glass lined vessels are not used for handling

Hydroflouric acid

Dilute HCI

Dilute HNO₃

Dilute HNO₃

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Hydrochloric acid is __________ corrosive to common metals.

Mildly

Least

Highly

Not

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For spinning viscose rayon, the extrusion spinnerettes are made of

Nickel

Platinum or gold alloys

High carbon steel

Aluminium

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Presence of silicon in steel

None of these

Decreases the blow holes formation tendency in castings

Is in the form of free Si

Indicates that steel is not deoxidised properly

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Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.

Cobalt

Tungsten

Chromium

Nickel

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When iron is rusted, it is

Converted to a fine powder

Oxidised

None of these

Reduced

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YOUR ANSWER : ?

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