A.The plate must be of low thermal conductivity
B.The plate surface must be smooth
C.The value of Prandtl number thust be 1
D.The value of Prandtl number must be zero
E.The value of Prandtl number must be 0.5
Related Mcqs:
- Which dimensionless number correlates the relative thickness of the hydrodynamic and thermal boundary layers?
- If thermal conductivity of a material of wall varies as ko (1 – ?t ). The temperature at the centre of the wall will be
- In case the adhesion between moleules of a fluid is greater than cohesion between fluid and the glass, then the free level of the fluid in glass tube dipped in the glass vessel will be
- A wall has two layers A and B, each made of a different material. Both the layers have the same thickness. The thermal conductivity of material of A is twice that of B. Under the thermal equilibrium the temperature difference across the wall is 30?C. The temperature drops in layers A and B will be respectively
- Compare the heat loss between the absorber plate of flat-plate collector and the cover with that between the cover and the ambient air at steady state.
- The boundary condition for steady flow of an ideal fluid is that the
- Which of the following is not a good way to improve the performance of a flat-plate solar collector?
- With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punched in the plate would be of diameter equal to
- An advantage of using copper for the absorber plate is that
- The Boundary layer on a flat plate is calld laminar boundary layer if
