Film coefficient is defined as Inside diameter of tube
A) Equivalent thickness of film
B) Thermal conductivity Equivalent thickness of film Specific heat x Viscocity
C) Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
D) Film coefficient x Inside diameter Thermalconductivity
E) none of the above.
Correct Answer:
Verified
Q14: Thermal diffusivity is
A)a dimensionless parameter
B)function of temperature
C)used
Q15: Thermal diffusivity of a substance is .
A)proportional
Q16: Unit of thermal diffusivity is
A)m2/hr
B)m2/hr°C
C)kcal/m2 hr
D)kcal/m.hr°C
E)kcal/m2 hr°C.
Q17: Thermal conductivity of wood depends on
A)moisture
B)density
C)temperature
D)all of
Q18: In convection heat transfer from hot flue
Q20: Heat conducted througfi unit area and unit
Q21: The rate of energy emission from unit
Q22: Emissivity of a white polished body in
Q23: A grey body is one whose absorptivity
A)varies
Q24: Two balls of same material and finish
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents