A six-cylinder, four-stroke, spark-ignition engineoperating on the ideal Otto cycle takes in air at 14 psia and1058F, and is limited to a maximum cFFycle temperature of 24008F. Each cylinder has a bore of 3.5 in, and each pistonhas a stroke of 3.9 in. The minimum enclosed volume is 9.8percent of the maximum enclosed volume. How much power will this engine produce when operated at 2500 rpm

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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?