A. hot working
B. tempering
C. normalising
D. annealing
E. special heat treatment
A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32
Hardness of martensite is about___________________? Read More »
Engineering Materials A. formation of bainite structure
B. carburised structure
C. martenistic structure
D. lamellar layers of carbide distributed throughout the structure
E. relieving of stresses throughout a component
Process of austempering results in__________________? Read More »
Engineering Materials A. hardening surface of workpiece to ob-tain hard and wear resistant surface
B. heating and cooling rapidly
C. increasing hardness throughout
D. inducing hardness by continuous process
E. hardening core
Induction hardening is the process of_____________________? Read More »
Engineering Materials A. tin, antimony, copper
B. tin and copper
C. tin and lead
D. lead and zinc
E. lead and copper
Solder is an alloy consisting of________________? Read More »
Engineering Materials A. nickel, chromium and iron
B. nickel, copper
C. nickel, chromium
D. nickel, zinc
E. nickel, lead
Inconel is an alloy of___________________? Read More »
Engineering Materials A. mild steel
B. cast iron
C. H.S.S.
D. high carbon
E. german silver
A cold chisel is made of_______________? Read More »
Engineering Materials A. silver and some impurities
B. refined silver
C. nickel, copper and zinc
D. nickel and copper
E. silver and gold
German silver is an alloy of___________________? Read More »
Engineering Materials A. aluminium, copper etc
B. nickel, molybdenum etc
C. nickel, copper, etc
D. all of the above
E. none of the above
The basic constituents of Hastelloy are_________________? Read More »
Engineering Materials A. sulphur, lead, phosphorous
B. silicon, aluminium, titanium
C. vanadium, aluminium
D. chromium, nickel
E. lubricants
Machining properties of steel are improved by adding___________________? Read More »
Engineering Materials