In an air standard diesel cycle, the compression ratio is 15, and at the beginning of isentropic compression, the temperature is 27°c and the pressure is 0.1 mpa. heat is added until the temperature at the end of the constant pressure processis 1450°c. for air, take cp1.005 kj/kg k and c, 0.718 kj/ kg k. calculate (a) the cut-off ratio. (b) the heat supplied per kg of air. (c) the cycle efficiency. (d) the mean effective pressure in kpa.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

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.