A hvdraulic cylinder has a piston 100mm in diameter and a piston rod 70mm in diameter. The oil flow rate is25l-/min and the pressure is 20 x l05Pa. The backpressure of the return oil is
2 x105Pa. Trv to calculate the largest thrusts, the moving speeds and their directions at the situations of a, b , c ( see the f ig. A-8 ) .

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.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

With increases in magnification, which of the following occur? a. the field of view decreases. b. the ambient illumination decreases. c. the larger parts can be measured. d. the eyepiece must be raised.