Acompression ignition engine is to be modeled using the ideal air-standard diesel cycle using constant specific heat (use cp = 0.240 [btu/(lbm r) and k = 1.4). this engine has a compression ratio of 20 and 400 [btu/lbm] are added during the heat addition process, and the state 1 temperature and pressure are 100°f and 15 [psia], respectively. calculate a)-the temperature and pressure after compression b)-the temperature and pressure after heat addition c)-the cutoff ratio d)-the thermal efficiency e)-the mean-effective pressure

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

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