Category: Engineering Materials

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

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. 70-75% copper and rest zinc and tin

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

A. silicon and sulphur
B. phosphorous, lead and sulphur
C. sulphur, graphite and aluminium
D. phosphorous and aluminium
E. none of the above

A. austenite
B. martensite
C. pearlite
D. cementite
E. all of the above

A. nichrome
B. invar
C. magnin
D. elinvar
E. peiminvar

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

A. made by adding carbon in steel
B. refined from cast iron
C. an alloy of iron and carbon with varying quantities of phosphorus and sulphur
D. extensively used for making cutting tools
E. extremely brittle

A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
E. 60 : 40

A. linear
B. non-linear
C. plastic
D. no fixed relationship
E. unpredictable behaviour