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. 70-78% copper and rest tin
E. 85-92% copper and rest zinc
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. 90% copper and 10% zinc
A. nickel, chromium and manganese
B. tungsten, molybdenum and phosphorous
C. lead, tin, aluminium
D. zinc, sulphur, and chromium
E. none of the above
A. gun metal
B. bronze
C. bell metal
D. babbit metal
E. brass
A. acidic
B. basic
C. neutral
D. brittle
E. none of the above
A. steel
B. A1203
C. Si02
D. MgO
E. german silver
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