Aspeed reducer has 20 full-depth teeth and consists of a 20-tooth steel spur pinion driving a 50-tooth cast-iron gear. the horsepower transmitted is 12 at a pinion speed of 1200 rev/min for a diametral pitch of 8 teeth/in and a face width of 1.5 in, find the contact stress

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

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented