Category: Engineering Materials

A. free carbon
B. graphite
C. cementite
D. white carbon
E. ferrite

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. improves wear resistance, cuttinability and toughness
B. refines grain size and produces les tendency to carburisation, improve corrosion and heat resistant proper ties
C. improves cutting ability and reduce hardenability
D. gives ductility, toughness, tensile strength and anti corrosion property:
E. none of the above

A. silver metal
B. duralumin
C. Hastelloy
D. monel metal
E. invar

A. 0.05%
B. 0.15%
C. 0.3%
D. 0.5%
E. 0.7%.

A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32.

A. paramagnetic
B. ferromagnetic
C. ferroelectric
D. dielectric
E. none of the above

A. 0.1 to 0.3%
B. 0.3 to 0.6%
C. 0.6 to 0.8%
D. 0.8 to 1.5%
E. 1.5 to 2.5%.

A. mild steel
B. cast iron
C. H.S.S.
D. high carbon
E. german silver

A. no graphite
B. a very high percentage of graphite
C. a low percentage of graphite
D. graphite as its basic constituent of composition
E. none of the above is true