Grashoff
Nusselt
Prandtl
Stanton
✅ The correct answer is option C.
Heat Transfer MCQs
The advantage of using a 1 – 2 shell and tube heat exchanger over a 1 – 1 shell and tube heat exchanger is
Lower tube side pressure drop
Lower shell side pressure drop
Higher tube side heat transfer co-efficient
Higher shell side heat transfer co-efficient
✅ The correct answer is option C.
For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.
Extremely low
Low
High
No
✅ The correct answer is option C.
It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is
> 0.75
< 0.75
< 0.50
< 0.25
✅ The correct answer is option B.
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid?
Bleed point
Vent
Catchall
Baffle
✅ The correct answer is option C.
Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger?
Corrosiveness
Fouling characteristic
Viscosity
None of these
✅ The correct answer is option D.
For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature)
Δt
Δt²
Δt³
√Δt
✅ The correct answer is option A.
Double pipe heat exchangers are preferably useful, when
High viscosity liquid is to be cooled
Requirement of heat transfer area is low
Overall heat transfer co-efficient is very high
A corrosive liquid is to be heated
✅ The correct answer is option B.
An ejector is used to
Increase pressure
Increase temperature
Remove condensate
None of these
✅ The correct answer is option D.
Grashoff number, which is defined as g . β(Ts – T∞) ρ². L³/μ², is proportional to the ratio of buoyancy force to __________ force.
Viscous
Elastic
Inertial
None of these
✅ The correct answer is option A.