The surface hardness of the following order is achieved by nitriding operation__________________?

Related Mcqs:

1. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________?

   A. 9,000 kg B. 13,500 kg C. 18,000 kg D. 27,000 kg E. 30,000 kg...

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

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

3. 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...

4. Depth of hardness of steel is increased by addition of_________________?

   A. nickel B. chromium C. tungsten D. vanadium E. ell of the above...

5. Hardness of martensite is about___________________?

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

6. Hardness of lower bainite (tempered martensite) is about________________?

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

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

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

8. The hardness of steel increases if it contains____________________?

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

9. 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...

10. Surface energy per unit area of a surface is numerically equal to _____________________?

    A. atmospheric pressure B. surface tension C. force of adhesion D. force of cohesion E. viscosity...