Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?

Related Mcqs:

1. Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?

   A. Removed by acid pickling
   B. Hammered into the surface
   C. Removed with coarse emery cloth
   D. Left as such to protect the surface

2. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

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

3. Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?

   A. Insulator for heat & electricity transmission
   B. Ferritic
   C. Behave like paramagnetic materials
   D. Superconductor

4. _______________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten ?

   A. Stellite
   B. High speed steel
   C. Cermet
   D. Alnico

5. Non-ferrous alloys used for making cutting tools need not have high__________________?

   A. Abrasion resistance
   B. Toughness
   C. Red hardness
   D. Cutting speed

6. _________________ furnace is generally used in the non-ferrous foundries ?

   A. Direct arc
   B. Indirect arc
   C. Resistance
   D. Induction

7. High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?

   A. 5 to 10
   B. 15 to 25
   C. 45 to 50
   D. 75 to 80

8. In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?

   A. Conduction
   B. Radiation
   C. Natural convection
   D. Forced convection

9. Young’s modulus of a material is the measure of its ___________________?

   A. Stiffness
   B. Malleability
   C. Creep resistance
   D. Tensile strength

10. During sensible heating of humid air__________________?

    A. Relative humidity increases
    B. Dew point remains constant
    C. Dry bulb & wet bulb temperature increases
    D. Both B & C