Afour stroke , four cylinder diesel engine running at 2000 rpm develops 60 kw. brake thermal efficiency is 30% and calorific value of fuel is 42 mj/kg. engine bore is 120 mm and stroke is 100mm. air density is 1.16 kg/m3, air-fuel ratio is 15: 1 and mechanical efficiency is 80%. calculate fuel consumption, air consumption, indicated thermal efficiency, volumetric efficiency, brake mean effective power and mean piston speed

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

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

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