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1. A six-pole induction motor for vehicle traction has a 50-kW input electric power rating and is 85 percent efficient. If the supply is 220 V at 60 Hz, compute the motor speed and torque at a slip of 0.04.
2. An AC induction machine has six poles and is designed for 60-Hz, 240-V (rms) operation. When the machine operates with 10 percent slip, it produces 60 N-m of torque.
3. A four-pole, three-phase induction motor drives a turbine load. At a certain operating point the machine has 4 percent slip and 87 percent efficiency. The motor drives a turbine with torque-speed characteristic given by TL = 20 + 0.006ω2. Determine the torque at the motor-turbine shaft and the total power delivered to the turbine. What is the total power consumed by the motor?
Water at 0.3 MPa and 400°C is placed into a rigid wall container. It is allowed to cool to the ambient temperature of 25°C. Determine a. the required heat transfer in kJ/kg b. the final fluid state (pressure and phase)
orifices are commonly placed in flow lines to measure the flow rate through the line. the flow rate is proportional to
an insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kpa and 27 oc. an electric
The atmosphere of Uranus is composed of methane, which behaves in a non-ideal manner. Develop a function that describes pressure as a function of height on Uranus, where pressure is related to volume and temperature by the following equation of state..
a rankine steam power plant should operate with a high pressure of 3 mpa a low pressure of 10 kpa and the boiler exit
an electrically driven pump operating at steady state is used to draw water from a pond. at the pump inlet the pressure
A stiletto heel has a semi-circular cross-section with radius of 0.25 in. Due to walking over irregular surfaces and shifts in body weight, moments of up to 30 lb.-in. can act where the heel attaches to the shoe. Determine the maximum tensile or comp..
A hydraulic cylinder has a piston diameter of 2.2 inches, a fluid pressure of 1100 psi, a flow rate of 132 cubic inches per minute, and a stroke of 10.5 inches. Find the force and the velocity generated by the piston.
the motion of a linkage in a mechanical system is examined by engineers. it has been determined that the velocity of an
the 2 mg car is being towed by a winch. if the winch exerts a force of t125s on the cable where 13m is the displacement
a long power transmission cable is buried at a depth ground-to-cable-centerline distance of 2 m. the cable is encased
consider incompressible viscous flow between two very long plates separated by a distance h. the bottom plate is
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