If h‚Äö√á√Ö = inner film co-efficient and /h‚Äö√á√� – McqOptions

MCQOPTIONS

1.	If h‚Äö√á√Ö = inner film co-efficient and /h‚Äö√á√á = outer film co-efficient, then the overall heat transfer co-efficient is%!
A.	Always less than h‚Äö√á√Ö
B.	Always between h‚Äö√á√Ö and h‚Äö√á√á
C.	Always higher than h‚Äö√á√á
D.	Dependent on metal resistance
Answer» C. Always higher than h‚Äö√á√á

Discussion

No Comment Found

Related MCQs

<p>The Graetz number is concerned with the</p>
Low thermal conductivity of heat insulating materials is due to its%!
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s‚Äö√Ö¬™¬¨œÄ is to be heated. Steam condensate at 95¬¨‚àûC is available for heating purpose, also at a rate of 10 Kg.s‚Äö√Ö¬™¬¨œÄ. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is%!
1 BTU/hr.ft.¬¨‚àûF is equal to __________ kcal/hr. m.¬¨‚àûC.%!
Value of Prandtl number for water ranges from%!
<p>Terminal point temperature differences between fluids in case of a heat exchanger is termed as</p>
Heat exchangers operating, when the asymptotic range is reached,%!
Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?%!
The most conducive surface for dropwise condensation to occur is the __________ surface.%!
Absorptivity and refletivity of a perfect black body are respectively%!