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The water in an 8-m-diameter, 3-m-high above-ground swimming pool is to be emptied by unplugging a 3-cm-diameter, 25-m-long horizontal pipe attached to the bottom of the pool. Determine the maximum discharge rate of water through the pipe. Also, explain why the actual flow rate will be less.
A shaft of 100mm diameter and 1 meter long has one of its ends fixed and the other end carries a disc of mass 500kg at a radius of gyration of 450 mm. The modulus of rigidity for the shaft material is 80 GN/m2. Determine the frequency of torsional vibration.
A motor has 5 speeds varying from 18 to 228 ram in a geometric progression
Starting from rest, you run the engines at full power and holding a straight line, you observe that the ship accelerates uniformly from 0 m/s to 10 m/s over 2.25 km. The mass of the ship fully loaded is 42500 tonnes and the average water resistance is known to be 6.5 MN. The ships engines (4 x 16 cylinder engines with a total 4500 l) are rated at 46080 kW.
a. Determine the total work done during the test.
b. Calculate the amount of power the engines delivered throughout the test. Are they delivering the rated power?
Compute all reactions at the base A of the traffic light standard, given that the tension in the cable BC is T = 544 lb. The weight of the standard is negligible compared with the 320-lb weight of the traffic light.
Starting from rest, you run the engines at full power and holding a straight line, you observe that the ship accelerates uniformly from 0 m/s to 10 m/s over 2.25 km. The mass of the ship fully loaded is 42500 tonnes and the average water resistance is known to be 6.5 MN. The ships engines (4 x 16 cylinder engines with a total 4500 l) are rated at 46080 kW.
a. Determine the total work done during the test.
b. Calculate the amount of power the engines delivered throughout the test. Are they delivering the rated power?
c. Prepare a Sankey diagram to explain the energy flow from chemical energy in the diesel fuel through to the kinetic energy of the liner indicating any losses.
Any help would be greatly appreciated. Thank you.
Tank A which is at a pressure of 1200 kPa, supplies 400 L/min of medium fuel oil to operate a hydraulic press via a 1” schedule 40 steel pipe. The medium fuel oil then exits the hydraulic press and returns to the pressurized tank A via a pump through 2” schedule 40 steel pipes. The pump is rated at 10 hp and has an efficiency of 90%. If the following data are known:
· Energy loss from tank A to the hydraulic press inlet is 5.4 Nm/N.
· Energy loss from hydraulic press outlet to the pump inlet is 0.8 Nm/N.
· Energy loss from outlet of pump to tank A inlet is 1.8 Nm/N.
Ignoring all other losses, compute the following:
1. Pressure at the hydraulic press inlet.
2. Pressure at the pump outlet.
3. Pressure at the pump inlet.
4. Pressure at the hydraulic press outlet.
5. Power removed from the fluid by the hydraulic press
- Question 20 of 20
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A 1.5m long column has a circular cross section of 5 cm in diameter. One of the ends of the columns is fixed in direction and position and the other end is free. Given that the factor is safety is 3. Calculate the safe load through the use of
(i) Rankine's formula, take that the yield stress as 560 N/mm2 and α = 1/600 for pinned ends
A rigid flange coupling is used to connect a 45KW 1440rpm electric motor to a centrifugal pump. The starting torque of the motor is 225% of the rated torque. There are 8 bolts and their pitch circle diameter is 150mm . The bolts are made of steel 45C8 (sigma yt 380N/mm2 ) the factor of safety is 2.5 . Determine the diameter of the bolts. Assume (sigma sy 0.577 sigma yt) . Assume that the bolts are finger tight is reamed and ground holes.
A wedge belt is required to transmit 18.5kw from an electric motor running at 1455rpm to a uniformly loaded conveyor running at 400rpm. The desired center distance is 1.4m select a suitable belt and determine the diameter of the pulleys
