A. 0.1
B. > 1
C. < 1
D. 1
Related Mcqs:
- At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?
A. 0.5
B. < 0.5
C. > 0.6
D. < 0.1 - Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?
A. 0.2
B. 0.4
C. 0.6
D. 0.8 - For _______________ Prandtl number values, the heat conduction will be negligible in the buffer zone?
A. Extremely low
B. Low
C. High
D. No - At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the___________________?
A. Buffer zone
B. Turbulent core
C. Both A. and B.
D. Viscous sub-layer - At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical ?
A. 1
B. 1
D. None of these - If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length________________?
A. ha = hl
B. ha = 2hl
C. ha = 0.5 hl
D. ha = 0.75 hl - Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?
A. 0
B. 0.5
C. 1
D. 5 - Prandtl and Reynolds analogy are same, when Prandtl number is____________________?
A. 0.5
B. 1
C. > 2
D. 1.5 - Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the _____________ zone?
A. Laminar
B. Transition
C. Both A & B
D. Highly turbulent - Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place____________________?
A. Between two bodies in physical contact with each other
B. Between two bodies not in physical contact with each other
C. From one part of a body to the another part of the same body
D. Both B & C
