Correction is applied to LMTD for __________ flow?
Correction is applied to LMTD for __________ flow?
A. Parallel
B. Counter
C. Cross
D. None of these
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For a given ambient air temperature with increase in the thickness of insulation of a hot cylindrical pipe, the rate of heat loss from the surface would ?
For a given ambient air temperature with increase in the thickness of insulation of a hot cylindrical pipe, the rate of heat loss from the surface would ?A. Decrease
B. Increase
C. First decrease and then increase
D. First increase and then decreaseIn case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?
In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?A. Increases
B. Decreases
C. Does not affect
D. May increase or decrease, depends on the type of baffleControlling heat transfer film co-efficient is the one, which offers ______________ resistance to heat transfer?
Controlling heat transfer film co-efficient is the one, which offers ______________ resistance to heat transfer?A. No
B. The least
C. The largest
D. LowerThe advantage of using a 1 – 2 shell and tube heat exchanger over a 1 – 1 shell and tube heat exchanger is_________________?
The advantage of using a 1 – 2 shell and tube heat exchanger over a 1 – 1 shell and tube heat exchanger is_________________?A. Lower tube side pressure drop
B. Lower shell side pressure drop
C. Higher tube side heat transfer co-efficient
D. Higher shell side heat transfer co-efficientLog mean temperature difference (LMTD) cannot be used, if ___________________?
Log mean temperature difference (LMTD) cannot be used, if ___________________?A. Heat transfer co-efficient over the entire heat exchanger is not constant
B. There exists an unsteady state
C. The heat capacity is not constant and there is a phase change
D. None of theseIn the free convection regime of pool boiling, the heat flux is proportional to__________________?
In the free convection regime of pool boiling, the heat flux is proportional to__________________?A. Δt1/2
B. Δt2
C. Δt5/4
D. Δt