Reynold’s analogy states that_________________?
Reynold’s analogy states that_________________?
A. Nst α f
B. Nst α NRe
C. NNu α f
D. NRe α f
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Stefan’s block body radiation law can also be derived from ______________ law?
Stefan’s block body radiation law can also be derived from ______________ law?A. Kirchoff’s
B. Planck’s
C. Fourier’s
D. None of theseThe thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?
The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?A. 1000
B. 727
C. 800
D. 1200The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?
The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?A. 25°C
B. 30°C
C. 35°C
D. 40°CjH factor for heat transfer depends upon the ____________ number?
jH factor for heat transfer depends upon the ____________ number?A. Biot
B. Nusselt
C. Reynolds
D. Prandtl1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?
1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?A. 520
B. 200
C. 400
D. 500Boiling point elevation of an ideal solution_______________?
Boiling point elevation of an ideal solution_______________?A. Increases rapidly with temperature rise
B. Decreases rapidly with temperature rise
C. In independent of pressure
D. Both B. and C.