A. Conduction
B. Natural convection
C. Forced convection
D. Radiation
A. Reynolds number
B. Prandtl number
C. Grashoff number
D. None of these
A. T1 – T2
B. T1 – Ta
C. T2 – Ta
D. None of these
A. 1 and 0
B. 0 and 1
C. 1 and ∞
D. 0 and 0.5
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. Dense structure
B. High proportion of air space
C. High specific heat
D. None of these
A. Remove non-condensable gases
B. Purge the condenser
C. Facilitate easy cleaning of tubes
D. None of these