Moist air enters a duct at 10ºc, 80% relative humidity, and a volumetric flow rate of 150 m3/min. the mixture is heated as it flows through the duct and exits at 30ºc.

no moisture is added or removed, and the mixture pressure remains approximately constant at 1.0 bar.

for steady-state operation, determine :

a) the rate of heat transfer, in kj/min,

b) the relative humidity at the exit. now solve this same problem using the psychrometric chart.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false