A graph between _____________ is called Wilson plot?

Related Mcqs:

1. A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?

   A. Ellipse
   B. Straight line
   C. Parabola
   D. Circular arc

2. ‘Duhring’s plot’ is of use in_________________?

   A. Extractive distillation
   B. Evaporation
   C. Leaching
   D. Absorption

3. Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because___________________?

   A. Convection becomes important
   B. Conduction becomes important
   C. Radiation becomes important
   D. Sub-cooled boiling occurs

4. In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?

   A. 1/V̅ -0.8
   B. V̅ -0.8
   C. V̅ -2
   D. 1/ V̅ -2

5. The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are _______________?

   A. (COP)R = (COP)HP = 0.6
   B. (COP)R = 2.5; (COP)HP = 1.5
   C. (COP)R = 1.5; (COP)HP = 2.5
   D. (COP)R = (COP)HP = 2.5

6. In a boiling curve, the peak heat flux is called the _____________ point?

   A. Nusselt
   B. Leidenfrost
   C. Boiling
   D. Burnout

7. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C- 1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2.°C-1. The rate of heat loss from the outer surface in W.m-2is__________________?

   A. 165.4
   B. 167.5
   C. 172.5
   D. 175

8. Terminal point temperature differences between fluids in case of a heat exchanger is termed as__________________?

   A. Approach
   B. Log mean temperature difference
   C. Arithmetic mean temperature difference
   D. Geometric mean temperature difference

9. Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?

   A. √d
   B. d
   C. d2
   D. d1.5

10. Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on_____________?

    A. T1 – T2
    B. T1 – Ta
    C. T2 – Ta
    D. None of these