An ideal Otto cycle has a compression ratio of 9. At the beginning of compression, air is at 14.4 psia and 80o F. During constant-volume heat addition 450 Btu/lbm of heat is transferred. Calculate (a) the maximum temperature, (b) efficiency and (c) the net work output. Use the IG model. (d) What-if Scenario: What would the efficiency be if the air were at 100o F at the beginning of compression

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.