Stefan-Boltzmann law applies to _____________ body?
Stefan-Boltzmann law applies to _____________ body?
A. Black
B. White
C. Grey
D. Any colour
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Heat transfer in the laminar sub-layer in case of a liquid flowing through a pipe, is mostly by__________________?
Heat transfer in the laminar sub-layer in case of a liquid flowing through a pipe, is mostly by__________________?A. Eddies current
B. Conduction
C. Convection
D. None of theseA multiple effect evaporator as compared to a single effect evaporator of the same capacity has _________________?
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has _________________?A. Lower heat transfer area
B. Lower steam economy
C. Higher steam economy
D. Higher solute concentration in the productWhich of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger ?
Which of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger ?A. Tube side pressure drop and the heat transfer rate
B. Convective heat transfer co-efficient
C. Effective tube surface area for convective heat transfer
D. All A. B. and C.Graetz number is given by__________________?
Graetz number is given by__________________?A. mCp/kL
B. kL/mCp
C. mCp/kμ
D. kμ/mCpThe rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the___________________?
The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the___________________?A. Heating volume
B. Heat transfer area
C. Nusselt number
D. None of theseIn counter flow compared to parallel flow, ?
In counter flow compared to parallel flow, ?A. LMTD is greater
B. Less surface area is required for a given heat transfer rate
C. Both A. and B.
D. More surface area is required for a given heat transfer rate