A. austenite
B. martensite
C. pearlite
D. cementite
E. all of the above
Related Mcqs:
- Steel contains____________________?
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 - Hardness of steel depends on_________________?
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 - Depth of hardness of steel is increased by addition of_________________?
A. nickel
B. chromium
C. tungsten
D. vanadium
E. ell of the above - The hardness of steel primarily depends on _____________________?
A. %age of carbon
B. %age of alloying elements
C. heat treatment employed
D. method of manufacture
E. shape of carbides and their distribution in iron - Dow metal contains____________________?
A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C. 90% aluminium and 90% copper
D. 90% magnesium and 9% aluminium with some copper
E. 90% magnesium and 10% tin - Phosphor bronze contains____________________?
A. 0.5% of phosphorous
B. 1% phosphorous
C. 2.5% phosphorous
D. 5% phosphorous
E. none of the above - Hardness of martensite is about___________________?
A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32 - Hardness of upper bainite (acicular structure) is about___________________?
A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32. - The surface hardness of the following order is achieved by nitriding operation__________________?
A. 600 VPN
B. 1500 VPN
C. 1000 to 1100 VPN
D. 250 VPN
E. 2000 VPN - Which of the following elements does not impart hardness to steel__________________?
A. copper
B. chromium
C. nickel
D. silicon
E. none of the above
