MET230 Week 1 In-Class Activity

Answer this question.

1. Technical Report A ( Design of hydraulic backhoe system ) : ( 6 Marks ) The Pictorial diagram below shows the system of hydraulic operated backhoe. - It is required to design a hydraulic system for a backhoe using two arms and a bucket The double acting cylinders A and B (operate at the same time) are used to operate the arm 1 The double acting cylinder C is used to operate the arm 2 The double acting cylinder D is used to operate the bucket. It is desired to design a hydraulic system to operate the hydraulic operated backhoe. The number and the type of DCV is your choice to make the best operating system. The best design gets the best marks. 1- Draw the appropriate system layout using the appropriate components symbols that makes your system operates at best . The symbolic Layout can be drawn using computer design tool or drawn by hand using ruler to be scanned and inserted as an image in the document. ( 3 ) 2- Make a table and list the name of the components used. ( 3 )

Question 1 (Pumps, pumping and water clarification) 1.1 List five different ways in which the pumping of fluids can be accomplished. 1.2 In a winze inclined at 30° to the horizontal, 36 kilolitres per hour must be pumped through a column of 300 m from the bottom to the top of the winze by means of a centrifugal pump. Assume the following: • Velocity is not to exceed 1,5 m/s • Coefficient of pipe friction = 0,01 • Pump and drive efficiency = 78% • Motor efficiency = 90% Determine: a) the size of column required b) the power of the electric motor to drive the pump

With reference to the momentum balance, which of the following sentences is correct? A. The momentum balance is the balance of forces within the control volume. B. The momentum balance equation is a scalar equation. C. For a pipe with a 90o reducing bend, an increase of the pressure at the inlet causes an increase of the vertical component of the force. D. For the flow through an orifice, the value of the exit velocity from the orifice depends upon the diameter of the orifice. Please write just a little about wrong options also, thanks!

Which of the following statements are true for accumulator used in hydraulic systems? 1. Accumulator stores fluid with pressure 2.Accumulator stores fluid without any pressure 3. Accumulator stores compressible liquid 4. Spring is used as an external source to keep the fluid under hydraulic pressure Select one: O a. 1,3 and 4 O b. 2 and 3 O c. 1 and 4 O d. 2,3 and 4

Which fluid is used in hydraulic power systems? Select one: O a. Most of all mentioned O b. Water O c. Oil O d. Incompressible fluids

What is the operation of a hydraulic system and it’s main components functions

How is tilting action possible in trucks for unloading the gravel material using hydraulic power? 1. Tilting action is possible if, oil flows at high pressure into the cylinder 2. Tilting action is possible if, air flows at low pressure into the cylinder 3. The truck body tilts when piston rod in the actuator is pushed out. 4. Tilting action is possible if air is compressed at high pressure Select one: O a. 1 and 3 O b. 3 and 4 O c. 2 and 4 O d. 1 and 2

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Which fluid is used in hydraulic power systems? Select one: O a. Incompressible fluids O b. Oil O . Most of all mentioned O d. Water

Describe the difference between closed and open system

22. Illustrate the comparison between Electro-Pneumatic and Electro-Hydraulic Power systemwith application examples

Please give a detailed handwritten solution. Use the correct formula. Don't use chatgpt.

1. Write in detail about working of any one hydraulic system application in construction area with neat diagram. 2. Illustrate the comparison between Electro-Pneumatic and Electro-Hydraulic Power system with application examples.

A Large wind turbine has blade span diameters of 110 m. It sits high off the ground where the average wind speed is 7 m/s. Assume the air density to be 1.25 kg/m3, and the efficiency of the wind turbine, its generator and its electric grid synchronization device is 26%. What is the average electric power that this turbine can output to the grid? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.

Figure Q2 shows Piping and Instrumentation Diagram (P&ID) of a hydraulic system used for a certain task. The system consists of several components; each has a specific function. (i) Identify the parts (1 to 5) of hydraulic system shown in the P&ID (ii) Explain the principle of operation of the system. 3

Q11. Below are the safety precautions before conducting hydraulic workshop except: a. Ensuring the all the equipment are available and in good condition. b. Ensuring lab-sheet with instruction is given. c. Ensuring the air-conditional system is working during conducting the lab works. d. Ensuring there are enough lighting and air ventilation when conducting the lab works Q12. Below are the advantages of hydraulic system, please select the best advantage when you applied hydraulic system at a bulldozer? a. Ability to cater heavy load b. Slow and precision motion. c. Easy to spot leakages of a hydraulic system d. Simpler and easier to maintain due to less system Q13. Which statement belowis the best to explain the application of pressure relief valve in automotive braking system. When braking, pressure relief valve is used to release the force to the braking pad b. When braking, the pressure relief value is used to increase the force to the braking pad c. When braking, the pressure…

Develop a Technology activity for your Grade 8 technology learners that will develop their understanding of and ability to use the principles of pneumatic/hydraulic systems.

1/ Suggest the type of the control valve that we should use, if we need to electrically control the motion between lifting or putting down the weight to a specific position, and once the required position is reached the weight must be locked in its position even if the pump is turned off. 2/Using the hydraulic symbols, plot the hydraulic schematic that represent the system shown above in the lifting status. 3/Determine the pressure P needed to lift the 50 kg weight by the cylinder at a constant speed.

B/ Calculate the following efficiencies for an assumed pumping system: a. Electric drive motor efficiency. b. Pump efficiency. c. System overall efficiency. Use the following inputs and outputs: Motor input power -3.73 kW: motor output power = 3.36 kW. Pump input power = 3.36 kW: pump output flow = 26 L/min: pump output pressure = 6895 kPa.

[Hydraulics] Describe the forces normally included while applying the momentum equation.

01: The process involves pumping fluid from tank A to tank B. The operation of the process can be described as follows: Before starting, PS1 must be closed. When the start button is bushed, the pump starts. - PS2 and PS3 must be closed 5s after the pump starts. If either PS2 or PS3 opens, the pump will shut off and will not be able to start again for another 14s. PS1 PS2 PS3 Tank Tank A B. Pump

As an engineering student, your community has asked you to assist an architect in designing a building fit for winter and summer. Apply your knowledge of mechanical engineering science (Thermofluid) in the design.  Kindly include the following:i. Specify the type of building (domestic or community centre)ii. Specify the capacity of the water (in volume) for the buildingiii. Include the vapour compression refrigeration cycle componentsiv. Suggest and discuss the source (s) of energy for the buildingv. Discuss the possible type of fuel to be used and give a reason for the usagevi. Include a sketch with key components

For forced draft counter flow cooling tower O a. fan is kept at top of cooling tower and air and water flow in same directions. Ob. fan is kept at bottom of cooling tawer and air and water flow in same directions. Oc fan is kept at bottomn of cooling tower and air and water flow in opposite directions. Od. fan is kept at top of cooling tower and air and water flow in opposite directions. TOSHIBA

Draft a sketch of this system describe below

3. List advantages and drawbacks of Hydraulic systems 4. What is the difference between absolute pressure and vacuum pressure?

Water at 5°C is to be pumped from the river to the bottom of a water tower. The pump is 5 m above the river (dimension "a" on the diagram below) and is supplied by a 6.00 inch schedule 40 pipe. The tank is 19.5 m above the pump (dimension "b" on the diagram below) and is supplied by a 4 inch schedule 40 pipe. The water level in the tank is 4.3 m above the inlet (dimension "c" on the diagram below). The pump delivers 0.021 m/s. Losses are estimated to be 1.2 m between the river and the pump, and 4.2 m between the pump and the tank. Discharge line Suction line Pump River a) Calculate the losses in the suction line in kPa, based on the given head loss in m. kPa b) Calculate velocity in the suction line in m/s. m/s c) What is the pressure at the inlet to the pump in kPa? kPa

In a hydraulic system, controls the fluid flow in numerous hydraulic lines. O a. pump O b. piston C. valve O d. reservoir

Instruction: Show your solution. (Engineering Utilities 2) Problem: A compressor draws in 500 cubic feet per minute of air whose density is 0.079 pounds per cubic feet and discharges it with a density of 0.304 pounds per cubic feet. At the suction, pressure # 1 = 15 pounds per square inches and at the discharge, pressure # 2 = 80 pounds per square inches. The increase in internal energy is 33.8 Btu per pound of air, and the heat rejected from air by cooling is 13 Btu per pound of air. Determine the work done on the air in Btu per minute and in horsepower. (1Btu = 778.16 ft-lbf; 1hp = 42.4 Btu/min)

FLUID POWER TECHNOLOGY 7) For the hydraulic system of Figure 3, the following data are given: •The pump is adding 4 kW (pump hydraulic power) to the fluid. •Pump flow is 2000 cm3/s. •The pipe has a 25.4 mm inside diameter. •The specific gravity of the oil is 0.9. Determine the pressure available at the inlet to the hydraulic motor (station 2). The pressure at station 1 in the hydraulic tank is 1 atm. The head loss hL due to friction between stations 1 and 2 is 9.144 m of oil. (Hint: Use Bernoulli’s formula)

Which of the following is acting on the fluid in a Vane Pump? a. Centripetal Force b. Centrifugal Force c. Tangential Force d. Shear Force

Oil Lubrication Systems – Pumps In order to maintain sufficient oil to critical components inside a combustion engine, it is necessary to increase both the flow capacity and pressure to assist dynamic lubrication. Oil pumps are normally mechanically driven by the crankshaft . Identify the various types of oil pumps (below). Insert text boxes to label each diagram and arrows to show direction of oil flow.