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9. Water enters the cooling tower at 55oC and leaves at 30oC while the heat rejected to air is 120 KW. Find the capacity of the pump needed to pump the water.
What vector type ( point, line, or polygon) best represents the following features; state boundaries,cities,stream networks,mountain peaks,soil types, flight tracks. Which of the above features may be represented by multiple vector type ? And what conditions may lead you to choose one vector over the other
Variation of the rate constant with temperature for the reaction
2N2O5 2N2O4+O2
is given in the following table.
Determine graphically, the activation energy for the reaction and frequency factor. (BL-3)
Find the horizontal and vertical force per foot of width on the tainter gate shown in figure below which has y = 62.4 C 25-1t radius Water C 25ft 36
If the pressure in container A in Fig. given below is 150 kPa, compute the pressure in container Wider 18 cm Oil, 16 cm 22 cm Mercury 8 cm
17. The moisture removed from a material is 200 lb/hr and change of humidity ratio in dryer is 0.015. Determine the fan capacity if specific volume of air entering is 38 ft3/lb.
16. Find the dew point temperature of air whose humidity ratio is 0.0150 kg water/kg dry air.
15. An airconditioning system has a sensible heat load of 120 kw and latent heat load of 25 kw. Find the sensible heat factor.
14. A cooling tower cools water from 39oC to 24oC at the rate of 25 kg/s. Air enters the tower at 18oC at the rate of 35 kg/s. Find the temperature of air leaving the tower.
13. The evaporative condenser of an ammonia refrigeration plant has a water flow rate of 100 kg/s and enters a natural draft cooling tower at 43oC. The water is cooled to 30oC by air entering at 27oC db 24oC wet bulb. The air leaves the tower as 90% RH and 32oC db. Calculate the percent of make-up water needed the tower. At 27oC db and 24oC wb: h = 72.5 KJ/kg, w = 0.0178 At 90% RH and 32oC db: h = 102 KJ/kg, w = 0.0275.
