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Pump vibration analysis A vibration analysis of a positive displacement pump shows a predominant vibration reading at a frequency of 1x the rotational speed of the pump. There is a phase shift of 180º between axial readings taken in the same direction on the drive and non-drive ends of the pump. What would you suspect […]

Shim Calculations Consider the small high-speed pump setup below (measurements in mm). This was one of three new pumps at a water wastewater plant. Alignment must be done on the system using the reverse method of alignment, especially since the pumps operate at a higher speed.The following measurements were made (motor = dial indicator reading […]

Hydraulic lift system – Sophiya Consider the hydraulic lift system in the figure below, with 10 mm rod and 50 mm cylinder, used to lift a 500 kg load.a) A handpump is being used with a stroke of 7 cm3 per pump actuation. How many pump cycles would be required to lift the load 100 […]

Hydraulic Pressure relief valve In a direct acting pressure relief valve, 64 bar pressure is acting on the conical dart seating area and the dart is kept closed by a spring force of 50 kg opposing the pressure. (5)a) Determine the bore diameter on the seat. b) What will the spring force be if a […]

Hydraulic cylinder lift calcs A pump delivers 40 litres/min to a 90 mm bore/30 mm rod cylinder to lift a load of 200 kg.a) What is the pressure exerted on the piston?b) What is the speed at which the load will be lifted?c) How much power is required to lift the load at this speed? […]

Hydraulic circuit – who can help with this question? A ladle as shown in the figure below is used to pass liquid aluminum from a holding furnace into a channel leading to a die-casting machine. This movement of the ladle is enabled by a double-acting cylinder activated by a 4/2-way valve. It must be mentioned […]

Pnuematic cylinder A double-acting cylinder has a piston with a diameter of 25 mm. The piston rod is 5 mm in diameter and pressure is supplied to the system at 3.5 MPa. Calculate the force produced by the cylinder for extension and retraction. Is this the question you were looking for? If so, place your […]

Lubrication 2 Given the following operating conditions for a rolling bearing, what lubricant would you select and what is the reason for your choice? Speed @ Bearing contact 10,000mm/s, Bearing pressure 1000KN/m².     Is this the question you were looking for? If so, place your order here to get started!

mechanical engineering lara A solid sphere whose diameter is 3.5 ft weighs 600 lb. The mass moment of inertia of the sphere with respect to a horizontal line through its center of gravity is A. 22.8 slug-fr’. B. 28.5 slug-ff. C. 36.0 slug-ft 2 . D. 45.6 slug-ft 2 .A solid wheel is being rolled […]

Plant Layout Which of the following layouts is suited for mass production? 1. Process layout 2. Functional Layout 3. Fixed Position Layout 4. Product layout   Is this the question you were looking for? If so, place your order here to get started!