Heat is closely related with___________________?
Heat is closely related with___________________?
A. liquids
B. energy
C. temperature
D. entropy
E. enthalpy
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If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid
Question: If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid
[A].remains unchanged. [B].
increases. [C].
increases or decreases depending on number of shell passes. [D].
decreases. Answer: Option D
Explanation:
No answer description available for this question.
In regenerator type heat exchanger, heat transfer takes place by___________________?
In regenerator type heat exchanger, heat transfer takes place by___________________?A. direct mixing of hot and cold fluids
B. a complete separation between hot and cold fluids
C. flow of hot and cold fluids alternately over a surface
D. generation of heat again and again
E. indirect transferA refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with cp = 1 kJ/kg)
Question: A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with cp = 1 kJ/kg)
[A].25 kJ/kg [B].
50 kJ/kg [C].
l00 kJ/kg [D].
125 kJ/kg Answer: Option B
Explanation:
No answer description available for this question.
The amount of heat flow through a body by conduction is_______________?
The amount of heat flow through a body by conduction is_______________?A. directly proportional to the surface area of the body
B. directly proportional to the temperature difference on the two faces of the body
C. dependent upon the material of the body
D. inversely proportional to the thickness of the body
E. all of the aboveDouble pipe heat exchangers are used
Question: 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. Answer: Option B
Explanation:
No answer description available for this question.
Heat transfer takes place as per ________________?
Heat transfer takes place as per ________________?A. zeroth law of thermodynamics
B. first law of thermodynamic
C. second law of the thermodynamics
D. Kirchoff’s law E. Stefan’s law