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
Related Mcqs:
- 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 increases if it contains____________________?
A. austenite
B. martensite
C. pearlite
D. cementite
E. all 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 lower bainite (tempered 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 - Corrundum contains more than 95% _____________________?
A. steel
B. A1203
C. Si02
D. MgO
E. german silver - The correct sequence for descending order of machinability is _____________________?
A. grey cast iron, low carbon steel, wrought iron
B. low carbon steel, grey cast iron, wrought iron
C. wrought iron,low carbon steel, grey cast iron
D. wrought iron, grey cast iron, low carbon steel
E. grey cast iron, wrought iron, low carbon steel
