Month: January 2019

A. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
B. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
C. is produced by annealing process. It is soft, tough and easily machined metal
D. is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
E. none of the above

A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
E. 60 : 40

A. 50 : 20 : 20 : 10
B. 40 : 30 : 20 : 10
C. 50 : 20 : 10 : 20
D. 30 : 20 : 30 : 20
E. 50 : 10 : 20 : 20

A. chromium and nickel
B. nickel and molybdenum
C. aluminium and zinc
D. tungsten and sulfur
E. none of the above

A. tin, lead and small percentage of antimony
B. tin and lead
C. tin, lead and silver
D. tin and copper
E. tin, copper and lead

A. F.C.C.
B. B.C.C.
C. H.C.P.
D. Orthorhombic crystalline structure
E. none of the above

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

A. 70% copper and 30% zinc
B. 90% copper and 10% tin
C. 85-92% copper and rest tin with little lead and nickel
D. 70-75% copper and rest tin
E. 70% copper and 30% tin

A. brittle
B. hard
C. ductile
D. tough
E. malleable

A. copper
B. brass
C. lead
D. silver
E. aluminium