The unit of conductance in SI unit is_______________?
The unit of conductance in SI unit is_______________?
A. W/m
B. W/m2
C. W/°K
D. W/m°K
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LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?
LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?A. 0
B. 1
C. > 1
D. < 1Nucleate boiling is promoted ___________________?
Nucleate boiling is promoted ___________________?A. On polished surfaces
B. On rough surfaces
C. In the absence of agitation
D. None of thesePlanck’s distribution law is valid for _____________ bodies?
Planck’s distribution law is valid for _____________ bodies?A. Black
B. White
C. Coloured
D. All A., B. & C.Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is __________________?
Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is __________________?A. In the central core of the fluid
B. Uniformly distributed throughout the fluid
C. Mainly confined to a thin film of fluid near the surface
D. None of theseIf all the conditions and dimensions are same, then the ratio of velocity through the tubes of a double pass heat exchanger to that through the single pass heat exchanger is_________________?
If all the conditions and dimensions are same, then the ratio of velocity through the tubes of a double pass heat exchanger to that through the single pass heat exchanger is_________________?A. 1
B. 2
C. 1/2
D. 4Maximum heat transfer rate is obtained in ______________ flow?
Maximum heat transfer rate is obtained in ______________ flow?A. Laminar
B. Turbulent
C. Creeg
D. Transition region