A. Grashoff
B. Nusselt
C. Prandtl
D. Stanton
Related Mcqs:
- If heat transfer rate varies with the time, it is termed as__________________?
A. Forced convection
B. Steady state conduction
C. Monochromatic radiation
D. None of these - Terminal point temperature differences between fluids in case of a heat exchanger is termed as__________________?
A. Approach
B. Log mean temperature difference
C. Arithmetic mean temperature difference
D. Geometric mean temperature difference - When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as ___________________ boiling?
A. Pool
B. Nucleate
C. Transition
D. Film - Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around ______________ BTU?
A. 180
B. 970
C. 3.97
D. Data insufficient, can’t be predicted - In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?
A. Geometric
B. Arithmetic
C. Logarithmic
D. Either A., B. or C. - The equation, Nst = (f/2)/[1 + 5 (Npr – 1) √(f/2)], corresponds to ______________ analogy?
A. Von-Karman
B. Reynolds
C. Colburn
D. Prandtl - Radiator of an automobile engine is a ______________ type of heat exchanger?
A. Co-current
B. Cross-current
C. Counter-current
D. Direct contact - Nusselt number is a function of Prandtl number and ______________ number of fluid in natural convection heat transfer?
A. Grashoff
B. Biot
C. Stanton
D. Reynolds - The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?
A. More
B. Less
C. Same
D. Unpredictable - If air (a non-condensing gas) is present in a condensing vapor stream, it will ______________ the condensation rate of vapor?
A. Increase
B. Decrease
C. Not affect
D. Increase the condensing film co-efficient as well as
