The units of resistance to heat transfer is _____________________?
The units of resistance to heat transfer is _____________________?
A. J.m-2.K-1
B. J.m-1.K-1
C. W.m-2.K-1
D. W-1m2K
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Thermal diffusivity is the most important in heat transfer by__________________?
Thermal diffusivity is the most important in heat transfer by__________________?A. Conduction
B. Radiation
C. Condensation
D. Natural convectionMultiple effect evaporators ar used to___________________?
Multiple effect evaporators ar used to___________________?A. Increase the steam economy & decrease the capacity
B. Increase the steam economy & the capacity
C. Decrease the steam economy & the capacity
D. Decrease the steam economy & increase the capacityA diathermanous substance _______________ the thermal radiation completely?
A diathermanous substance _______________ the thermal radiation completely?A. Absorbs
B. Reflects
C. Transmits
D. None of theseEvaporation by thermo compression results in the _________________________?
Evaporation by thermo compression results in the _________________________?A. Saving of steam
B. Realisation of multiple effect economy in a single effect
C. Both A. and B.
D. None of theseTube expansion allowances exist in _____________ heat exchanger?
Tube expansion allowances exist in _____________ heat exchanger?A. Multipass fixed tube sheet
B. U-tube
C. Single pass fixed tube sheet
D. None of theseWater is normally used as a coolant in the heat exchange equipments mainly because of its___________________?
Water is normally used as a coolant in the heat exchange equipments mainly because of its___________________?A. Abundance & high heat capacity
B. Low density
C. Low viscosity
D. High fluidity