A. nickel
B. chromium
C. tungsten
D. vanadium
E. ell of the above
Related Mcqs:
- Corrosion resistance of steel is increased by addition of________________?
A. chromium and nickel
B. sulphur, phosphorus, lead
C. vanadium, aluminium
D. tungsten, molybdenum, vanadium, chromium
E. zinc - 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 - The hardness of steel increases if it contains____________________?
A. austenite
B. martensite
C. pearlite
D. cementite
E. all 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 - The machinability of steel is increased by___________________?
A. silicon and sulphur
B. phosphorous, lead and sulphur
C. sulphur, graphite and aluminium
D. phosphorous and aluminium
E. none of the above - Corrosion resistance of steel is increased by adding__________________?
A. chromium and nickel
B. nickel and molybdenum
C. aluminium and zinc
D. tungsten and sulfur
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
