Refrigerant 22 undergoes a constant-pressure process within a piston-cylinder assembly from saturated vapor at 4 bar to a final temperature of 30 degree c. kinetic and potential energy effects are negligible.
for the refrigerant, show the process on a p-v diagram. evaluate the work and the heat transfer, each in kj per kg of refrigerant.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.