Related Questions

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
Which of the following nuclear reactor does not need a heat exchanger for generation of steam?
A Gas cooled
B Liquid metal cooled
C Pressurised water
D Boiling water
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
A Critical
B Breeder
C Fertile
D Heterogenous
A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires
A Less heating surface
B More space
C Lower maintenance cost
D None of these
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
A Specific fuel consumption is very low due to the use of heavy water
B Fuel cost is much lower than that used in pressurised water or boiling water reactor
C Heavy water is used both as coolant as well as moderator
D Both B and C
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.
A Once
B Twice
C Thrice
D Four times
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
A Back pressure turbine
B Pass out turbine
C Low pressure turbine
D Impulse turbine
LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is
A Higher
B Lower
C Same
D Depends on the area of heat exchanger
If all the conditions and dimensions are same, then the ratio of velocity through the tubes of a double pass heat exchanger to that through the single pass heat exchanger is
A 1
B 2
C $$\frac{1}{2}$$
D 4
In counter current flow heat exchanger, the logarithmic temperature difference between the fluids is ________ as compared to parallel flow heat exchanger.
A Same
B Less
C Greater
D None of these

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