Month: January 2019

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

A. silver and some impurities
B. refined silver
C. nickel, copper and zinc
D. nickel and copper
E. silver and gold

A. aluminium, copper etc
B. nickel, molybdenum etc
C. nickel, copper, etc
D. all of the above
E. none of the above

A. sulphur, lead, phosphorous
B. silicon, aluminium, titanium
C. vanadium, aluminium
D. chromium, nickel
E. lubricants

A. nickel
B. chromium
C. tungsten
D. vanadium
E. ell of the above

A. flywheel of steam engine
B. cast iron pipes”
C. cycle chains
D. gas turbine blades
E. piston I.C. engine

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

A. amount of carbon it contains
B. the shape and distribution of the car-bides in iron
C. method of fabrication
D. contents of alloying elements
E. the quality of ore from which it is made

A. malleable iron
B. nodular iron
C. spheroidal iron
D. grey iron
E. none of the above

A. 80% or more iron
B. 50% or more iron
C. alloying elements like chromium, tungsten nickel and copper
D. elements like phosphorus, sulphur and silicon in varying quantities
E. high quantities of sulphur