A. Gases
B. Solids
C. Liquids
D. Both B. and C.
A. Minimum
B. Maximum
C. Zero
D. Infinity
A. The heat transfer rate is low in view of the large temperature drop
B. It is difficult to maintain
C. It is not economic
D. None of these
A. The cooling rate will be the same for the two spheres and hence the two spheres will have
equal temperatures at any instant
B. Both the spheres will emit equal amount of radiation per unit time in the beginning
C. Both will absorb equal amount of radiation from the surrounding in the beginning
D. Both B. & C.
A. Strouhal number
B. Sherwood number
C. Euler number
D. Grashoff number
A. Always less than h1
B. Always between h1 and h2
C. Always higher than h2
D. Dependent on metal resistance
A. Heat exchanger
B. Condenser
C. Multiple effect evaporator
D. Steam jacketed kettle