Depth of hardness of steel is increased by addition of_________________?

Related Mcqs:

1. 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...

2. 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...

3. The hardness of steel increases if it contains____________________?

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

4. 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...

5. 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...

6. 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...

7. Hardness of martensite is about___________________?

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

8. Hardness of upper bainite (acicular structure) is about___________________?

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

9. 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...

10. Which of the following elements does not impart hardness to steel__________________?

    A. copper B. chromium C. nickel D. silicon E. none of the above...