2. (a) In a closed vessel at 310K and 1013kPa, the percentage relative humidty of moist air is 70 . At 310K the pressure of the sahuratnd water vapaur is 6.37kPn, calculate: (i) the partial pressurn of the water vapour in the vasen ( (kPa): [2 MARKS] (ii) the humidity H (ket kgr) [2 MARKS] (iii) the percertage humidity (9), [2 MARKS] (iv) the hurrid volume (m2kg1k [2 MARKS] (v) the hurrid heat (kJkg1K+1). [2 MARKS] (b) Describe the classificefion af mecheniksil creught cooling tower and its abuantages gnd disgdvanteges compered with \& neturgl drauajk cacing tower. [6 MAFKS] (c) Determine the base dameter and haight af a hyperbolc natural draught ooaing lower with the foltwing condtions. Assume the air lesving the packing inside the tawer is sahurated at the mean of iniet and outint of watn inmperaturos. [9 MARKS] Question 2 Cont'd Overicat Page 3 of 11