381. What are the compact heat exchangers?
the heat exchangers having large surface area per unit volume.
382.What is the purpose of using baffles in shell-and-tube heat exchangers?
to maintain uniform spacing between tubes and enhance the heat transfer.
383.In parallel flow heat exchangers________
the exit temperature of hot fluid is always more than the exit temperature of cold fluid.
384.Fixed volumes is a characteristic of
Liquids & Solids.
385.Data loggers are helpful in
plotting a heating curve & cooling curve.
386. A much slower process than boiling that is called
Evaporation.
387.Liquids may become vapors
at a temperature below the boiling point of a liquid.
388.A constant temperature at which a pure liquid change into a gas that is called
boiling point.
389.Thermodynamic temperature scale in SI system is the
Kelvin Scale.
390.in an irreversible process, there is
loss of heat.
391.During thermodynamic throttling process
there is no change of internal energy
no work is done
heat exchange does not take place
All of these
392.In an isothermal process for perfect gas, sum of heat flow and work input is
Zero.
393. "Heat can flow from cold substance to hot substance with the aid of external work".
Clausius name is associated with the above statement.
394. One bar pressure is the same as
100,000 N/m2
395. Air leaking from a punctured tube is an example of
Throttling process.
396. A diathermic wall permits
Heat exchange by all the three modes of heat transfer.
397. A Brayton cycle is also a reversed
Joule cycle.
398. In a Carnot cycle the heat is rejected at
Constant temperature.
399. In a Joule cycle, the heat is rejected at
Constant pressure.
400. Which one of the following is an indirect reaction device?
Propeller.
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