Chemical Engineering - Heat Transfer

41.
Viscous & heat sensitive liquids are concentrated in __________ evaporators.
open pan
long tube
agitated film
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C.
1.49
1
4.88
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on
T1 - T2
T1 - Ta
T2 - Ta
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

44.
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.
Prandtl
Nusselt
Stanton
Grashoff
Answer: Option
Explanation:
No answer description is available. Let's discuss.

45.
For a perfectly transparent surface (like gases), the
absorptivity = 0
transmissivity = 1
reflectivity = 0
all (a), (b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.