Category: Engineering Materials

A. 0.025%
B. 0.06%
C. 0.1%
D. 0.25%
E. 0.8%.

A. 0.1 to 0.2%
B. 0.25 to 0.5%
C. 0.6 to 0.7%
D. 0.7 to 0.9%
E. 1.0 to 1.2%.

A. improves wear resistance, cutting ability and toughness
B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
C. improves cutting ability and reduces hardenability
D. gives ductility, toughness, tensile strength and anticorrosion properties
E. makes steel hard

A. adding carbon up to 2.8%
B. adding carbon up to 6.3%
C. adding carbon up to 0.83%
D. adding small quantities of copper
E. adding copper and carbon

A. substitutional solid solution
B. interstitial solid solution
C. intermetallic compounds
D. all of the above
E. none of the above

A. zinc
B. lead
C. silver
D. glass
E. brass

A. silver, copper, zinc
B. silver, tin, nickel
C. silver, lead, zinc
D. silver, copper, aluminium
E. silver, lead, tin

A. 0.025%
B. 0.26%
C. 0.8%
D. 1.25%
E. 1.7%.

A. delta metal
B. monel metal
C. constantan
D. nichrome
E. silicon bronze

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