A10,000 m^3 room has a valve leaking tetrachloroethylene, which is adding 50 mg/min of vapor to the room air. the gev system moves 75 m^3/min of air through the room.
a) what will be the cmax of tetrachloroethylene vapor in the air?
b) if the leak stops after reaching the maximum concentration what will be the vapor concentration in 1 hour?
assume the blower speed of gev in increased to 100 m^3/min.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature