Uā – Uā
1/Uā – 1/Uā
1/Uā – 1/Uā
Uā – Uā
ā
The correct answer is option B.
Engineering
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1562. The equivalent diameter for pressure drop is __________ that for heat transfer.
Smaller than
Greater than
Equal to
Not related with
ā
The correct answer is option A.
1563. Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively)
C/E
E/C
CE
1/CE
ā
The correct answer is option A.
1564. Dropwise condensation is promoted on a/an __________ surface.
Glazed
Oily
Coated
Smooth
ā
The correct answer is option B.
1565. In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
Once
Twice
Thrice
Four times
ā
The correct answer is option B.
1566. Which area is used in case of heat flow by conduction through a cylinder?
Logarithmic mean area
Arithmetic mean area
Geometric mean area
None of these
ā
The correct answer is option A.
1567. Sensible heat of hot industrial flue gases can not be recovered by a/an
Economiser
Regenerator
Ceramic recuperator
None of these
ā
The correct answer is option D.
1568. A tank painted with which of the following coloured paints, would heat up maximum by radiation from sun?
Yellow paint
White paint
Black paint
Grey paint
ā
The correct answer is option C.
1569. Steam traps are provided in steam carrying pipelines to
Condense steam
Release excess steam pressure by bleeding steam
Remove condensate and inert gases
None of these
ā
The correct answer is option C.
1570. The critical radius ‘r’ of insulation on a pipe is given by
r = 2k/h
r = k/h
r = k/2h
r = h/k
ā
The correct answer is option B.