A. 0.1
B. 0.23
C. 0.42
D. 0.51
E. 0.64

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Related Mcqs:

  1. Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of__________________?
    A. 0.002 B. 0.02 C. 0.01 D. 0.1 E. 0.5...
  2. Thermal conductivity of water in general with rise in temperature ____________________?
    A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. none of the above...
  3. Thermal conductivity of non-metallic amorphous solids with decrease in temperature __________________?
    A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. unpredictable...
  4. Unit of thermal conductivity in M.K.S. units is ___________________?
    A. kcal/kg m2 °C B. kcal-m/hr m2 °C C. kcal/hr m2 °C D. kcal-m/hr °C E. kcal-m/m2 °C...
  5. Thermal conductivity of solid metals with rise in temperature normally___________________?
    A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. unpredictable...
  6. Unit of thermal conductivity in S.I. units is__________________?
    A. J/m2 sec B. J/m °K sec C. W/m °K D. A. and C. above E. B. and C. above...
  7. Thermal conductivity of air with rise in temperature__________________?
    A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. none of the above...
  8. Thermal conductivity of a material may be defined as the________________?
    A. quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C B. quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C...
  9. Thermal conductivity of glass-wool varies from sample to sample because of variation in ________________ ?
    A. composition B. density C. porosity D. structure E. all of the above...
  10. Thermal conductivity of wood depends on_______________?
    A. moisture B. density C. temperature D. all of the above E. none of the above...
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