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Materials and Construction

Materials and Construction
Light weight metallic alloy used in aircraft industry is

Phosphor bronze
High silicon (14%) iron
Duralumin
Aluminium

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Materials and Construction
Presence of silicon in steel

None of these
Indicates that steel is not deoxidised properly
Is in the form of free Si
Decreases the blow holes formation tendency in castings

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Materials and Construction
Concrete tank can be used to store

Sulphuric acid
Ferrous sulphate
Alum
Saturated brine

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Materials and Construction
Which of the following pairs of elements may form an alloy?

Iron & mercury
Platinum & mercury
Iron & carbon
None of these

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Materials and Construction
Which of the following metals in not used for coating of the base metal to guard it against corrosion?

Magnesium
Aluminium
Cadmium
Lead

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Materials and Construction
__________ steel is widely used for the manufacture of motor car crankshafts.

Silicon
High speed
Nickel
Chrome

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