When studying a rubbed and degraded fracture surface to identify cyclic vs. monotonic loading, the following will visually identify cyclic loading: a. beach marks
b. ratchet marks
c. striated regions on the fracture surface
d. microvoid coalescence

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above