Chemical Engineering - Heat Transfer

16.
h.D/K is called the __________ number.
Nusselt
Peclet
Rayleigh
Grashoff
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
Prandtl number is the ratio of
mass diffusivity to thermal diffusivity.
momentum diffusivity to thermal diffusivity.
thermal diffusivity to mass diffusivity.
thermal diffusivity to momentum diffusivity.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)
x/KA
KA/x
K/Ax
A/Kx
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
Heat flux, as defined in heat flow is analogous to __________ in electricity flow.
current
voltage
resistance
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)
αT
α 1/T
α T4
independent of T
Answer: Option
Explanation:
No answer description is available. Let's discuss.