Addition of _______________ to steel does not help in improving its machinability ?

Related Mcqs:

1. Addition of ____________________ to steel does not help in improving its machinability?

   A. Sulphur
   B. Silicon
   C. Lead
   D. Phosphorous

2. Pick out the wrong statement about the machinability of metals. Machinability of a metal ?

   A. Decreases with increase in strain hardening tendencies
   B. Decreases with increase in hardness, in general
   C. Depend on the composition, microstructure and physical & mechanical properties
   D. Decreases with increases in tensile strength & decrease in grain size

3. To improve the machinability of steel, it is generally subjected to _____________________?

   A. Spheroidising
   B. Tempering
   C. Normalising
   D. Annealing

4. Addition of _____________________ to steel does not impart hardness?

   A. Nickel
   B. Copper
   C. Chromium
   D. Silicon

5. Machinability of hard alloys and tool steels is improved by_____________________?

   A. Spheroidising
   B. Annealing
   C. Tempering
   D. Normalising

6. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?

   A. 5-10
   B. 1000-1500
   C. 120-500
   D. 1500-3000

7. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of _______________ steel bars?

   A. Hot rolled mild
   B. Cold rolled mild
   C. Forged
   D. Machinable stainless

8. ________________ property of steel increases by addition of large amount of silicon in it?

   A. Mechanical
   B. Machining
   C. Magnetic
   D. Refractory

9. Limestone addition in the blast furnace is done to flux _______________ present in the raw materials?

   A. SiO2
   B. Al2O3
   C. MnO2
   D. P

10. Tumbling is the process of improving the ________________ of the materials/parts ?

    A. Surface finish
    B. Fatigue limit
    C. Creep limit
    D. Surface cleanliness