Engineering, 13.09.2019 00:10 shavis123
Heating of oil by air. a flow of 2200 lbm/h of hydrocarbon oil at 100°f enters a heat exchanger, where it is heated to 150°f by hot air. the hot air enters at 300°f and is to leave at 200°f. calculate the total lb mol air/h needed. the mean heat capacity of the oil is 0.45 btu/lbm · °f.
Answers: 2
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
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
Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero
Answers: 2
Engineering, 04.07.2019 18:20
Wiy doeres rere okhn a pump whon working betwon the same pressure range?
Answers: 2
Heating of oil by air. a flow of 2200 lbm/h of hydrocarbon oil at 100°f enters a heat exchanger, whe...
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