Engineering, 15.05.2021 23:30 damilysgonzalez2
A naturally-aspirated 4-stroke CI engine with the displacement volume of 2.8Liters operating at 3000 rpm. The average indicated power developed is 12.5kW per cubic meter of air inducted per minute. The engine volumetric efficiency is 85% and the atmospheric condition is 1atm and 15°C. A supercharger with an isentropic efficiency of 74% and pressure ratio of 1.6 is added to the intake of the engine. Assume that at the end of induction, the cylinders contain a volume of charge equal to the swept volume at the pressure and temperature of the delivery from the supercharger. Also assume all mechanical efficiencies are 78%. Calculate:
a. The volumetric efficiency of the supercharged engine,
b. The increase in brake power by supercharging.
Answers: 1
Engineering, 04.07.2019 18:10
The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false
Answers: 2
Engineering, 04.07.2019 18:10
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10
Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)
Answers: 3
Engineering, 04.07.2019 18:20
Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above
Answers: 1
A naturally-aspirated 4-stroke CI engine with the displacement volume of 2.8Liters operating at 3000...
Chemistry, 23.11.2020 18:50
Physics, 23.11.2020 18:50
Mathematics, 23.11.2020 18:50
English, 23.11.2020 18:50
Social Studies, 23.11.2020 18:50
Mathematics, 23.11.2020 18:50
Chemistry, 23.11.2020 18:50
Mathematics, 23.11.2020 18:50
Mathematics, 23.11.2020 18:50
Medicine, 23.11.2020 18:50