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

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

7. Presence of nickel & chromium in steel does not raise its _________________?

   A. Elastic limit
   B. Machining properties
   C. Ductility
   D. Resilience

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

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

9. 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

10. Steel containing low percentage of nickel, chromium & tungsten are termed as the _____________ steel ?

    A. Wrought
    B. Tool
    C. Alloy
    D. Plain carbon