1 BTU/hr.ft.°F is equal to _____________ kcal/hr. m.°C?
1 BTU/hr.ft.°F is equal to _____________ kcal/hr. m.°C?
A. 1.49
B. 1
C. 4.88
D. None of these
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The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?
The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?A. 2
B. 1/2
C. 4
D. 1/4Air is best heated with steam in a heat exchanger of__________________?
Air is best heated with steam in a heat exchanger of__________________?A. Plate type
B. Double pipe type with fin on steam side
C. Double pipe type with fin on air side
D. Shell and tube typeIn case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?
In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?A. Equal to
B. More than
C. Less than
D. Either more or less than (depending upon the fluid)For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?
For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?A. Nu = 0.023 Re0.8. Pr0.4
B. Nu = (π/2) Gz
C. Nu = (2/π) Gz
D. Nu = 2Gz0.5Terminal point temperature differences between fluids in case of a heat exchanger is termed as__________________?
Terminal point temperature differences between fluids in case of a heat exchanger is termed as__________________?A. Approach
B. Log mean temperature difference
C. Arithmetic mean temperature difference
D. Geometric mean temperature difference____________ chart is known as transient heat conduction chart?
____________ chart is known as transient heat conduction chart?A. Dirhing’s
B. Heisler’s
C. Mollier’s
D. Cox