Mechanical Engineering Archives

An elevator raises a 3000 lb load through a distance of 50 ft in 10s. If the efficiency of the entire system is 80%, how much input horsepower is required by the elevator hoist motor? How much torque is delivered by a 2 hp, 1800 rpm hydraulic motor?

Posted on April 23, 2023 by Assessments

Department of Mechanical and Materials Engineering University of Jeddah ENME 457: Pumps & Hydraulics (SEM-III 2022-23) assignment 1: Fluid power, fluid machinery & Fundamentals of pump (due date: 18.04.23) NAME: ID: SECTION: Part A: Fluid Power Define the term fluid power. Explain any five benefits of fluid power for the users. Compare between a hydraulic […]

Given: ri =2.5in.,7.2= 1.0in.. 7.3 = 3.1in., r4= 2.0in., a3 = lin., b3= 1.0in. co2= 5 rad/sec, a2 = 0 rad/sec2 Find: 4 A. Add columns for a3 and a4 to the four-bar spreadsheet used in the previous three homework assignments based on -.Thar template.xls”. Also. include the acceleration components of the coupler point P. A, and An.

Posted on March 29, 2023 by Assessments

Four-bar Mechanism: Given: ri =2.5in.,7.2= 1.0in.. 7.3 = 3.1in., r4= 2.0in., a3 = lin., b3= 1.0in. co2= 5 rad/sec, a2 = 0 rad/sec2 Find: 4 A. Add columns for a3 and a4 to the four-bar spreadsheet used in the previous three homework assignments based on -.Thar template.xls”. Also. include the acceleration components of the coupler […]

Compute the stress described by length OC. Put a dimension on the circle to show this stress value. (1) c) Compute the radius of the circle using Pythagoras’ theorem. Show your calculations

Posted on October 22, 2022 by Assessments

General Instructions Solve this assignment on engineering paper. Follow the instructions accurately for full credit. Choose an appropriate scale for drawing each Mohr’s Circle. Use the axis orientations shown in class . Use a new set of axes for each circle. Instruction for Problems 1-6 (60 points) Each element shown below describes the stresses applied […]

Briefly compare the toughness of the materials.Calculate the average toughness and standard deviation for each material.

Posted on October 11, 2022 by Assessments

Izod Impact Test (a) Use the table below with absorbed energy (Joules) results obtained for three materials tested. Calculate the average toughness and standard deviation for each material. Izod Impact Test Steel Brass Aluminum 1 2.56 1.87 0.97 2 2.62 1.72 0.79 3 2.68 1.67 0.80 Average absorbed energy Standard deviation (b) Sample calculation for […]

Combine tutorial 7 and 8. Tutorial 7 uses the relay as a switch between two LED options. When the switch changes the LED, write a comment on the LCD screen that says what the user should see in the LEDs. For example, say “Green LED on, Red LED off”.

Posted on September 21, 2022 by Assessments

Combine tutorial 7 and 8. Tutorial 7 uses the relay as a switch between two LED options. When the switch changes the LED, write a comment on the LCD screen that says what the user should see in the LEDs. For example, say “Green LED on, Red LED off”. Basically, whatever is happening with the […]

Explain, with help of a sketch, the following gear tooth nomenclature: Addendum, Dedundum, Face width, Tooth thickness, Pitch Circle.

Posted on June 2, 2021 by Ambrose

GEARS AND GEAR DRIVES 1. With the help of the enclosed PDF, elaborate in about 15-20 lines, the ‘mechanical’ reasons for catastrophic structural failure of Aloha Flight 243. 2. You are to select a suitable drive for power transmission for an industrial equipment. As a design engineer, you select a belt-drive system over gear drive […]

What are wire ropes? Explain the parameters for selecting a suitable wire rope, and its construction, and wire rope description.

Posted on June 1, 2021 by Ambrose

WIRE ROPES – CONSTRUCTION AND SELECTION CRITERIA COURSE QUESTION What are wire ropes? Explain the parameters for selecting a suitable wire rope, and its construction, and wire rope description.

Describe, using a brake-circuit sketch (and Pascal’s principle), how braking force gets multiplied in a typical automobile, from brake-pedal to brake-pads. Show a schematic to obtain a 36X force multiplier (ie Output force of 360 lb) through a mechanical advantage of brake lever (4X) and remaining through hydraulic force multiplication, for an input force of 10 lb at the master cylinder.

Posted on June 1, 2021 by Ambrose

DESIGN OF CLUTCHES AND BRAKES – COURSE QUESTIONS 1. Describe, using a brake-circuit sketch (and Pascal’s principle), how braking force gets multiplied in a typical automobile, from brake-pedal to brake-pads. Show a schematic to obtain a 36X force multiplier (ie Output force of 360 lb) through a mechanical advantage of brake lever (4X) and remaining […]

What is Impact Factor? Derive, step by step, a relationship between Static and Dynamic Deflection (δ and δst) and Equivalent Static Force (Fe) and static loading due to weight of part (W) in a member subjected to tensile loading.

Posted on June 1, 2021June 1, 2021 by Ambrose

Question What is Impact Factor? Derive, step by step, a relationship between Static and Dynamic Deflection (δ and δst) and Equivalent Static Force (Fe) and static loading due to weight of part (W) in a member subjected to tensile loading.

An 18-ton industrial elevator is supported by a standard steel cable of 3 in.2 cross section and an effective modulus of elasticity of 12 * 106 psi. As the elevator is descending at a constant 500 ft. /min, an accident causes the top of the cable, 80 ft. above the elevator, to stop suddenly. Estimate the maximum elongation and maximum tensile stress developed in the cable.

Posted on June 1, 2021 by Ambrose

An 18-ton industrial elevator is supported by a standard steel cable of 3 in.2 cross section and an effective modulus of elasticity of 12 * 106 psi. As the elevator is descending at a constant 500 ft. /min, an accident causes the top of the cable, 80 ft. above the elevator, to stop suddenly. Estimate […]

Essay Quoll

Category: Mechanical Engineering

An elevator raises a 3000 lb load through a distance of 50 ft in 10s. If the efficiency of the entire system is 80%, how much input horsepower is required by the elevator hoist motor? How much torque is delivered by a 2 hp, 1800 rpm hydraulic motor?

Compute the stress described by length OC. Put a dimension on the circle to show this stress value. (1) c) Compute the radius of the circle using Pythagoras’ theorem. Show your calculations

Briefly compare the toughness of the materials.Calculate the average toughness and standard deviation for each material.

Combine tutorial 7 and 8. Tutorial 7 uses the relay as a switch between two LED options. When the switch changes the LED, write a comment on the LCD screen that says what the user should see in the LEDs. For example, say “Green LED on, Red LED off”.

Explain, with help of a sketch, the following gear tooth nomenclature: Addendum, Dedundum, Face width, Tooth thickness, Pitch Circle.

What are wire ropes? Explain the parameters for selecting a suitable wire rope, and its construction, and wire rope description.

What is Impact Factor? Derive, step by step, a relationship between Static and Dynamic Deflection (δ and δst) and Equivalent Static Force (Fe) and static loading due to weight of part (W) in a member subjected to tensile loading.