a) Calculate the volume of water that is available for power generation at the extremes of spring and nap tides? b) If during the time the turbines are running, the level of the water in the bay is 2m higher that that in the sea, what is the potential energy available from the scheme? c) Assuming the turbines and associated ma ...continues
Exam sample question in Applied Mechanics
Question 1 A solid shaft 125mm dia. Transmits 600kW at 300 rev/min. It is also subjected to a bending moment of 9kN-m and to an end thrust. If the maximum principal stress is limited to 80MPa , determine the permissible end thrust. Determine also the position in which the principal stress acts and draw a diagram showing the ...continues
Exam sample question in Applied Mechanics
In Fig. Q4, the winding drum of a lift is driven by an electric motor via a gearbox having a reduction ratio of 20:1. The direct inertia on the motor shaft is 0.05 kg m2 and that on the winding shaft is 20 kg m2. The drum, which has a diameter of 600 mm, moves a lift by means of a cable wound around it. If the lift has ...continues
PLEASE NOTE THAT I ONLY REQUIRE THE ANSWER FOR PART 2 OF THE QUESTION BELOW. ALSO THAT I HAVE BEEN GIVEN AN ANSWER OF 87.8 rad/s FOR PART 2, BUT WITH NO WORKINGS OUT, WHICH I AM REQUESTING FROM YOU. HOPE YOU CAN HELP. I HAVE INCLUDED AN ATTACHMENT BELOW OF THE QUESTION, IN CASE YOU DO NOT GET THE COMPLETE QUESTION BELOW. Que ...continues
Calculating a Constant Pressure process
In a constant pressure, nonflow process, 6Btus of heat are added to a gas while the volumes change from 1.6ft^3 to 2.0ft^3. If the temperature decreases by 10*F and the system contains 2 lbm of gas, find the pressure in the system. (Cv=.2Btu/lbm*F) 1Btu=778 ft-lbm
(See attached file for full problem description) --- The magnetic circuit shown in figure below is built up of solid iron cross section, 1 x 1 cm2. Each air gap is 1 mm wide. For this type of air gap, the effective cross-section of air may be taken as 1.2 x that of iron path to allow for fringing. Two different grades of iro ...continues
Hysteresis and Eddy-Current Losses
Consider the core shown in the figure below. The mean length of magnetic path is 40cm and the effective area of cross section of the core is 9cm2. The number of turns in the exciting coil is 400. When a sinusoidal voltage of 200V (RMS) at frequency of 50Hz is applied to the exciting coil, the hysteresis loss is found to be 36 W ...continues
