_______________ paint has the maximum absorption coefficient ?
_______________ paint has the maximum absorption coefficient ?
A. Black
B. Yellow
C. White
D. Grey
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Cpμ/K is termed as the ______________ number?
Cpμ/K is termed as the ______________ number?A. Grashoff
B. Nusselt
C. Prandtl
D. StantonAsymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube___________________?
Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube___________________?A. Exit-fluid temperature > wall temperature
B. Exit fluid temperature < wall temperature
C. Exit fluid temperature = wall temperature
D. Graetz number > 100With 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 compositionIn 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_____________ paint has the minimum absorption co-efficient?
_____________ paint has the minimum absorption co-efficient?A. Black
B. White lead
C. Grey
D. Light creamArithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?
Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?A. Thin walled having the value of Ao Ai/< 2
B. Thick walled
C. Having the value of Ao/Ai > 2
D. Both B. and C.