A pump impellor has an outside radius of 50 cm, an inside radius of 15 cm, and vanes with a uniform opening (width) of 15 cm. When the impellor is rotated at an angular speed of 400 rpm, water exits from the impellor with an absolute velocity of 45 m/s. The angle of the exiting water (αo) is 45°. Determine the torque generated by the exiting flow.

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?