The equation, Nst = f/2, is the _____________ analogy?
The equation, Nst = f/2, is the _____________ analogy?
A. Colburn
B. Reynolds
C. Prandtl
D. None of these
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With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?
With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on its compositionWith increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?
With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?A. Decreases
B. Increases
C. Increases exponentially
D. Remain unaffectedIn an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of___________________?
In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of___________________?A. Concentrations
B. Chemical potentials
C. Activity co-efficients
D. Mass transfer co-efficientsIn a gas-liquid shell and tube heat exchanger, the_________________?
In a gas-liquid shell and tube heat exchanger, the_________________?A. Presence of a non-condensable gas decreases the condensing film co-efficient
B. Gases under high pressure are routed through the tube side, because high pressure gases are
corrosive in nature
C. Gases to be heated/cooled is normally routed through the shell side, because the corrosion
caused by the cooling water or steam condensate remain localised to the tubes
D. All A, B. & C.In case of a super-cooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is ________________?
In case of a super-cooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is ________________?A. More
B. Less
C. Same
D. More or less; depends on the nature of solutionThe variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of ‘a’ in SI system will be________________?
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of ‘a’ in SI system will be________________?A. W/m.k
B. W/m
C. W/m.k2
D. None, ‘a’ is just a number