Activity 3.2.1 Elements of Power



Activity 3.2.1 Elements of PowerIntroductionHave you ever blown a circuit in your house? What causes the circuit to blow? What can you do to avoid blowing a circuit in the future?You have probably heard the word horsepower used when talking about a vehicle’s engine. What exactly does it mean? Does horsepower only apply to automobiles?In this activity you will learn about the different elements of automation power. You will learn the basic vocabulary associated with power. You will apply formulas to solve power problems.Equipment Elements of Power presentationPencilCalculatorProcedureDefine each term.WorkPowerTorqueHorsepowerWhat is wattage and how is it calculated?What are the two types of fluid power systems?How are fluid power systems operated?What are the advantages and disadvantages of pneumatic power supplies?What are the advantages and disadvantages of hydraulic power supplies?Power Calculation ProblemsIf an object with 1000 lb of weight is to be raised vertically from ground level to 5 ft in two seconds, how much power is required?If a 110-volt appliance requires 20 amps, what is the total power consumed?A ? hp motor requires 120 volts. What amperage is required?150 lb of force is applied at the end of a shaft that is 2 ? ft long. It is applied at an angle of 90° to the lever. How much torque is produced? If the shaft is rotating at 350 rpm, what is the power?35 pounds of force is applied to a 3-inch cylinder with a 6-inch stroke. What is the power produced by the cylinder that moves its full stroke in 0.7 s?A pneumatic device produces 35 psi of power when a force of 20 pounds is applied. What is the diameter of the cylinder?ConclusionGive an example of each of the three types of power supplies.ElectricalPneumaticHydraulicDescribe a situation in which a combination of power supplies would be useful.A woman is wearing a shoe with a heel as pictured. If the woman weighs 125 lb, how much pressure is she exerting on the floor?A man is wearing a shoe with a heel as pictured. If the man weighs 180 lb, how much pressure is he exerting on the floor? ................
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