Thermal diffusivity is given by__________________?
Thermal diffusivity is given by__________________?
A. k/ρCp
B. ρCp/k
C. μCp/a
D. μ/hCp
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In a heat exchanger, one transfer unit means___________________?
In a heat exchanger, one transfer unit means___________________?A. A section of the exchanger in which change in temperature of one stream equals the average
driving force in the section
B. The size of the exchanger in which heat transfer rate is 1 kcal/hr
C. Both A. and B.
D. None of theseWhich of the following has maximum thermal conductivity ?
Which of the following has maximum thermal conductivity ?A. Iron
B. Coal
C. Nitrogen
D. TarIn a single effect evaporator, the economy is________________?
In a single effect evaporator, the economy is________________?A. 1
B. < 1
C. > 1
D. None of theseIn 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-efficientsLMTD for evaporators & condensers for a given terminal parameters & set of conditions for counter-flow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the ______________ flow?
LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counter-flow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the ______________ flow?A. Parallel
B. Mixed
C. Counter flow
D. Same in either A , B. or C.A dephlegmator is a_____________________?
A dephlegmator is a_____________________?A. Total condenser
B. Vacuum evaporator
C. Partial condenser
D. Double pipe heat exchanger