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04. Factors Influencing Choice of Material 1

04. Factors Influencing Choice of Material 1

Assessment

Presentation

Engineering

Vocational training

Practice Problem

Medium

Created by

Kevin Little

Used 4+ times

FREE Resource

88 Slides • 39 Questions

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Recap Questions

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Multiple Choice

DMADV stands for

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design measure analyse define validate

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define measure analyse design verify

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define measure analyse design validate

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design measure analyse define verify

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Multiple Choice

we use DMADV if ...

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it can't be analyse in DMAIC

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the cpk value below 1.33

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any special cause

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the process doesn't exist

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Multiple Select

DMADV is a .... approach/method

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reengineering

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continous improvement

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Multiple Choice

Verify cause & effect relationship and to determine the root cause(s) of the defect is the definition of ... stage

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analyse

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verify

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control

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design

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Multiple Choice

The Six Sigma method DMADV is used to?

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Improve an existing business process

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Create new products or process designs

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Optimise an existing product

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Define high level project goals

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Multiple Choice

In the Six Sigma method DMADV, at what stage would you ‘identify factors critical to quality, and identify the capabilities of the product and the production process’ ?

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Define

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Measure

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Analyse

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Verify

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Multiple Choice

The Six Sigma Business Improvement Technique aims to?

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Minimise the process outputs

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Maximises variability

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Identify and remove the causes of defects

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Eliminate any future defects

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Activity

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Classification of Material

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Open Ended

Question image

How many mechanical properties can you name?

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Questions on

Mechanical

properties

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Multiple Choice

What property does a material have if it returns to its original shape after being deformed?

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Elasticity

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Plasticity

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Strength

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Ductility

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Multiple Choice

Which of the following is not a mechanical property of materials?

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Hardness

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Resistivity

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Brittleness

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Toughness

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Multiple Choice

Which do you think is the least plastic material

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Putty

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Dough

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Gum

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Spoung

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Multiple Choice

Which property is defined from the ability to be drawn out into a wire?

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Hardness

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Malleability

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Ductility

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Plasticity

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Multiple Choice

Which do you think is the most malleable substance?

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Copper

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Ice

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Glass

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Rubber

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Fill in the Blanks

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Fill in the Blanks

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Fill in the Blanks

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Open Ended

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Can you suggest a material for the body, tires and windscreen

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Activity

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Stress Calculations

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Open Ended

Question 1: Basic Stress Calculation

A metal rod has a cross-sectional area of 0.002 m² and experiences a tensile force of 2000 N. What is the stress in the rod?

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Open Ended

Question 2: Finding the Force

A steel cable experiences a stress of 50 MPa. If its cross-sectional area is 0.005 m², what force is acting on it?

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Open Ended

Question 3: Finding the Cross-Sectional Area

A bolt experiences a tensile force of 15,000 N and the resulting stress is 300 MPa. What is the cross-sectional area of the bolt?

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Open Ended

Question 4: Stress in a Circular Rod

A circular rod with a diameter of 10 mm carries a tensile force of 5000 N. Calculate the stress in the rod.

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Open Ended

Question 5: Stress in a Rectangular Plate

A rectangular metal plate with a width of 50 mm and thickness of 10 mm carries a force of 25,000 N. Calculate the stress in the plate.

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Activity

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Strain Calculations

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Open Ended

Question 1: Basic Strain Calculation

A steel rod originally 2 m long is stretched by 0.002 m under tension. What is the strain?

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Open Ended

Question 2: Finding the Change in Length

A metal wire experiences a strain of 0.005 when stretched. If its original length was 1.5 m, how much has it elongated?

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Open Ended

Question 3: Finding the Original Length

A plastic strip stretches by 4 mm under tension. If the strain is 0.002, what was its original length?

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Open Ended

Question 4: Strain in a Compressed Bar

A wooden bar originally 0.8 m long is compressed by 1.6 mm. What is the strain?

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Open Ended

Question 5: Strain in a Long Wire

A 3.5 m long copper wire is stretched by 5 mm due to a load. Calculate the strain.

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Case Study:- Read the following article, Questions to follow

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Multiple Choice

What was the primary cause of the Hyatt Regency walkway collapse?

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Hurricane

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Fire

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Structural overload resulting from design flaws

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Earthquake

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Multiple Choice

How many people were injured in the collapse?

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300

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216

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150

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100

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Multiple Choice

How many people were killed in the Hyatt Regency walkway collapse?

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50

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114

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200

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300

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Multiple Choice

In which city did the Hyatt Regency walkway collapse occur?

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Chicago

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Kansas City

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Los Angeles

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New York

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Multiple Choice

What year did the Hyatt Regency walkway collapse happen?

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1981

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1980

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1982

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1979

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Multiple Choice

What was the main material used in the construction of the walkways?

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Brick

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Plastic

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Steel

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Wood

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Multiple Choice

What was the immediate cause of the walkway collapse?

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Earthquake

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Design change in steel hanger rods

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Flood

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Fire

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Multiple Choice

What was the original design flaw in the walkway?

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Improper lighting

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Insufficient support for the weight

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Lack of fire exits

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Incorrect material used

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Multiple Choice

What was the response of the engineering community after the disaster?

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No changes were made

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Increased construction speed

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Increased focus on engineering ethics

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Decreased safety standards

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Multiple Choice

What was the final outcome for the hotel after the collapse?

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It was demolished

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It was never reopened

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It was renovated and reopened

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It was converted into a museum

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Factor of Safety

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Open Ended

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What do you think was the cause of these disasters?

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Open Ended

What have you learnt from this lesson

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