Engineering Materials - Interview Questions | Exam2Win

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26. A specimen of aluminium metal when observed under microscope shows

A. B.C.C. crystalline structure

B. F.C.C. crystal structure

C. H.C.P. structure

D. a complex cubic structure

E. orthorhombic crystalline structure.

Explanation:

27. If a refractory contains high content of silicon, it means refractory is

A. acidic

B. basic

C. neutral

D. brittle

E. none of the above.

Explanation:

28. Corrundum contains more than 95%

A. steel

B. A1203

C. Si02

D. MgO

E. german silver.

Explanation:

29. The usual composition of a soldering alloy is

A. tin, lead and small percentage of an-timony

B. tin and lead

C. tin, lead and silver

D. tin and copper

E. tin, copper and lead.

Explanation:

30. Steel made from phosphatic iron is

A. brittle

B. hard

C. ductile

D. tough

E. malleable.

Explanation: