____________ 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
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The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is___________________?
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is___________________?A. More
B. Less
C. Some
D. Either more or less; depends on the nature of vaporUse of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?
Use of transverse baffles in a shell and tube heat exchanger is done to increase the___________________?A. Rate of heat transfer
B. Flow velocity
C. Turbulence of shell side fluid
D. All A., B. and C.In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?
In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?A. Geometric
B. Arithmetic
C. Logarithmic
D. Either A., B. or C.Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place____________________?
Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place____________________?A. Between two bodies in physical contact with each other
B. Between two bodies not in physical contact with each other
C. From one part of a body to the another part of the same body
D. Both B & CDropwise condensation occurs on ______________ surfaces?
Dropwise condensation occurs on ______________ surfaces?A. Clean and dirt free
B. Smooth clean
C. Contaminated cooling
D. PolishedAs per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?A. Temperature of the body only
B. Wavelength of monochromatic radiation
C. Both A. and B.
D. Nature of material of body