The hardness of steel increases if it contains____________________?

Related Mcqs:

1. 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...

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

   A. nickel B. chromium C. tungsten D. vanadium E. ell 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. 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...

6. Phosphor bronze contains____________________?

   A. 0.5% of phosphorous B. 1% phosphorous C. 2.5% phosphorous D. 5% phosphorous 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...