Related Questions

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
A Heat transfer co-efficient are high
B There is no risk of contamination
C There is no mist formation
D Cost of equipment is lower
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
In a shell and tube heat exchanger, floating head is used for
A Large temperature differentials
B High heat transfer co-efficient
C Low pressure drop
D Less corrosion of tubes
I saw a floating flower in the pond. Here floating is__
A A gerund
B A participle
C A main verb
D An infintitive
PHP can automatically convert integers to floating point numbers and floating point numbers to integers.
A TRUE
B FALSE
In a heat exchanger, floating head is provided to
A Facilitate cleaning of the exchanger
B Increase the heat transfer area
C Relieve stresses caused by thermal expansion
D Increase log mean temperature gradient
The purpose of floating head in a heat exchanger is to
A Avoid buckling of tubes
B Provide support for tubes
C Decrease the pressure drop
D Facilitate its lengthening, if needed
Multipass heat exchangers are used
A Because of simplicity of fabrication
B For low heat load
C To obtain higher heat transfer co-efficient and shorter tube
D To reduce the pressure drop
Double pipe heat exchangers are used
A When heat transfer area required is very high
B When heat transfer area required is very low, i.e (100 - 200 ft2)
C Because it occupies less floor area
D Because it is less costly
In shell and tube heat exchangers, straight tie rods are used to
A Hold baffle in space
B Fix the tubes in position
C Account for thermal strain
D None of these

Next steps