A black body does not ____________ radiation?
A black body does not ____________ radiation?
A. Absorb or emit
B. Refract
C. Reflect
D. Both B. & C.
Chemical Heat Transfer
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Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is__________________?
Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is__________________?A. 0.4
B. 0.5
C. 0.6
D. 0.7 -
Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around ______________ BTU?
Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around ______________ BTU?A. 180
B. 970
C. 3.97
D. Data insufficient, can’t be predicted -
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 these -
What is the geometric mean of two heat transfer areas A1 and A2 ?
What is the geometric mean of two heat transfer areas A1 and A2 ?A. √(A1 . A2)
B. √(A1 + A2)
C. ½ √(A1 . A2)
D. 2 √(A1 . A2) -
The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?
The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?A. 2
B. 1/2
C. 4
D. 1/4 -
Which has the lowest Prandtl number ?
Which has the lowest Prandtl number ?A. Liquid metal
B. Aqueous solution
C. Water
D. Lube oil -
In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is_________________?
In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is_________________?A. Linear
B. Hyperbolic
C. Parabolic
D. None of these -
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___________________?
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 -
‘Duhring’s plot’ is of use in_________________?
‘Duhring’s plot’ is of use in_________________?A. Extractive distillation
B. Evaporation
C. Leaching
D. Absorption