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Worksheets6.12: Material Testing Methods
Total questions: 76
Worksheet time: 1hrs 1mins
What is the purpose of understanding material testing methods?
To choose the correct material for an engineering application
To increase production cost
To reduce material strength
To ignore material properties.
Fill in the blank: The testing methods are used to evaluate strain, hardness, and ___.
Flexibility
Toughness
Color
Weight
Material testing methods are used to evaluate which of the following properties?
Color
Strain, hardness, and toughness
Weight
Temperature
Why is tensile testing used?
To find out how strong a material is
To measure the color of a material
To determine the weight of a material
To assess the temperature of a material.
What is the purpose of performing a tensile test?
To measure the color of a material
To determine the tensile strength of a material
To calculate the weight of a material
To find the temperature of a material.
Why are test pieces standardized in a tensile test?
To ensure they are colorful
To make them heavier
To ensure results are reproducible and comparable
To make them more expensive.
What information does the outcome of a tensile test provide?
The color of the material
Information for design calculations
The weight of the material
The temperature of the material.
The outcome of a tensile test helps to demonstrate that a material complies with ______.
A) color requirements
B) weight specifications
C) the requirements of the appropriate specification
D) temperature limits.
What is the ultimate tensile strength (UTS)?
The maximum stress a specimen is exposed to during testing
The stress at which a material breaks
The point at which plastic deformation occurs
The stress at which a material returns to its original shape.
Strain hardening refers to how much the material hardens with plastic deformation when it is strained beyond the ______.
A) Elastic limit
B) Yield point
C) Breaking point
D) Ultimate strength
What is the Charpy impact test also known as?
Charpy V-notch test
Charpy U-notch test
Charpy T-notch test
Charpy S-notch test
In the Charpy test, what is used to strike the specimen?
Hammer
Pendulum
Scale
Anvil
What is the Brinell test used for?
Measuring electrical conductivity
Testing material hardness
Determining thermal expansion
Analyzing chemical composition
What is the main difference between the Vickers hardness test and the Brinell test?
Use of a steel ball
Use of a diamond indenter
Use of a rubber indenter
Use of a glass indenter
The Vickers hardness test is more reliable on very hard materials because the diamond does not deform at high loads. True or False?
True
False
In the Rockwell test, what is applied first?
Major load
Minor load
Equal load
No load
How does the Rockwell test measure hardness?
By measuring electrical resistance
By measuring the difference in depth after applying loads
By measuring thermal expansion
By measuring magnetic induction.
What is the purpose of the Wohler test in material science?
To determine the tensile strength
To determine the fatigue resistance
To determine the hardness
To determine the elasticity.
The determination of fatigue resistance using the Wohler test involves applying which types of stresses?
Compressive and tensile
Shear and bending
Torsional and shear
Bending and compressive
In the Wohler test, what component is used to measure the number of revolutions?
Motor
Shaft
Revolution counter
Shutoff switch
Corrosion laboratories focus on several areas. Which of the following is NOT one of them?
Electrochemical
Corrosivity
Heat transfer
Color analysis
Corrosion testing processes can be applied to ______ materials and infrastructure products.
industrial
agricultural
digital
biological
Which of the following is often used in failure analysis?
Corrosion testing
Painting
Welding
Polishing
Immersion testing is used to assess different materials that are subjected to ______ conditions.
random
particular
unknown
general
Why is immersion testing considered versatile?
It can only test one type of material
It can be personalized to meet specific needs
It is the cheapest method
It requires no equipment.
The Hot wall test is utilised to evaluate situations where metal vessels are ______ than bulk solutions.
colder
hotter
more flexible
less dense
The Salt spray test is used to evaluate a coated sample’s resistance to ______.
A) heat
B) corrosion
C) pressure
D) electricity
What is the main focus of the Hot wall test?
Temperature impact on corrosion
Pressure resistance
Electrical conductivity
Magnetic field strength
Which test is used to evaluate situations where metal vessels are hotter than bulk solutions?
Hot wall test
Salt spray test
Tensile test
Impact test
What is the formula for resistivity (p) of a material?
p = R/A
p = RA/l
p = l/RA
p = A/R
Maximum stress in engineering stress-strain diagram is called
Yield strength
Breaking strength
Tensile strength
Young's Modulus
During Tensile Test experiment both upper cross head and lower cross head moves in opposite direction
True
False
Maximum stress in engineering stress-strain diagram is called
Yield strength
Breaking strength
Tensile strength
Young's Modulus
Which one is the measure of plastic deformation?
Hardness
Strength
Stiffness
% elongation
During Tensile Test experiment both upper cross head and lower cross head moves in opposite direction
True
False
Extensometer is
used to measure applied load on the sample
electronic sensor to measure elongation
mechanical sensor to measure elongation
A tool used to fix the sample between the cross head
Resilience of a material can be calculated by measuring
the slope of the stress strain diagram at origin
the slope of the stress strain diagram at the elastic region
the slope of the stress strain diagram at yield point
area under the stress strain diagram upto yield point
true strain is more than engineering strain.
True
False
In case of Cast Iron sample, fracture in tensile test occurs
in the plane at 45 degree with axis
in the plane at 0 degree with axis
cup and cone type
Which of the following is true?
ductility is related to tensile force
malleability is related to compressive force
malleability is a measure of , how long we can draw a sample
ductility is a measure of how thin we can make a sample by compressing it
UTM is used to
Tensile Test
Compressive Test
Bending Test
Fatigue Test
Tensile strength of CI is more than Compressive Strength of it.
True
False
There will be no volume change if Poisson's ratio is
1
0.8
0.5
0
% elongation found on a sample is 4%. The material can be considered as
Ductile
Brittle
Which property is measured by notch impact test?
Tensile toughness
Fracture toughness
Impact Toughness
Proof Resilience
Least count of the Impact test scale in the lab is .............
1 J
10 J
100 J
None of these
If 50 vernier division matches with 49 mm in the main scale then least count of the vernier scale is ......................
0.01 mm
0.001 mm
0.1 mm
0.05 mm
None of these
Toughness of the material
reduces with the increase of temperature
reduces with the decrease of temperature
independent of temperature
increases first and then decreases with the increase of temperature
Which alloying element improves toughness in steel?
S
C
Ni
P
Which of the following is correct?
Tensile toughness is less than impact toughness.
Suddenly applied load and impact load are same.
Charpy sample is placed in the setup like cantilever beam.
In Charpy Test initial hammer position is 90 degree with vertical
All other options are incorrect.
Concrete is exceptionally high in compression strength but relatively weak in _______________ strength, because it can easily be pulled apart.
tensile
creep
fracture
hardnes
An investigation confirmed excess weight on a weak material was the reason for the system collapsing. The information derived from a _ test.
torsion
tensile
compression
fatigue
A road crater develops due to an increase of traffic on the road, and it confirms the material used to pave the road as being "stressed". such information could have been discovered when conducting a(n):
fatigue test.
torsion test.
tensile test.
erosion test.
Applying pressure at three locations will cause the wood to show where pressure is causing a problem. This is an example of a:
tension test.
fatigue test.
torsion test.
tensile test.
When the material indicates where excess force may compromise its strength, but it does not break, it is an example of:
fatigue test.
torsion test.
compression test.
tensile test.
Which point indicates the material being "stressed"?
B
None of the above.
C
A
Which point indicates the material collapsing (breaking)?
B
None of the above.
C
A
Which point indicates the maximum strength the material can support?
B
None of the above.
C
A
Which section indicates "necking"?
0 - A
B - C
A - B
A - C
Hardness Test is a
Non Destructive Test
Destructive Test
Material of indentor in Brinell Hardness Test is
Steel Ball
Diamond
Both can be used
None of these
Major load used in Rockwell Hardness Test for cemented carbide sample is
10kgf
50kgf
90kgf
140kgf
If the load used in Brinell hardness test is 3000kgf and indentation diameter is 4.2mm, Then Brinell Hardness Number is around
85.4
112.5
206.5
329.4
Which of the following Hardness Test is suitable for measuring hardness of coatong on a substrate
Rockwell
Brinell
Shore
Knoop
Which of the following Rockwell scale is suitable for non-ferrous soft materials
A-Scale
B-Scale
C-Scale
Hardness of Car tyre is measured in
Knoop Test
Vikers Test
Moh Test
Shore Test
Ultimate Tensile Test of a steel sample is 400MPa, Its BHN is approximately
63
115
1400
2800
Diamond indentor shape of square-based pyramid whose opposite sides meet at the apex at an angle of 136° is used in
Rockwell Test
Brinell Test
Vikers Test
Knoop Test
Rockwell indentation
Brinell indentation
Vikers indentation
Knoop indentation
Which hardness test is suitable for hard polymers?
Vikers Test
Knoop Test
Barcol Test
"A" is used to provide major load
"B" is used to provide minor load as well as major load
At the "C" load selector selector we set the major load
None of the options are correct
What is this component?
Indentor
Dial gauge
Load
Anvil
Basic principle of the hardness number in brinell test is
indentation depth
projected area of indentation
curved surface area of the indentation
scratch
To eliminate the error due to surface roughness in Rockwell Test
Surface is prepared properly
Dwell time is provided after application of load
Minor load is applied
Roughness value of the sample is fed into the calibration equation
If the load limit of the tester is maximum 187.5kgf, For Brinell Hardness Test at this load what diameter indentor ball should be used as standard
10mm
5mm
2.5mm
1/16 inch
76-85.
Answer the questions below after watching the video
What is the main principle behind the Vickers hardness test?
Applying a rotating force to the test piece
Using a laser to measure surface hardness
Pressing a pyramid-shaped diamond indenter onto the test piece
Pressing a spherical indenter onto the test piece
What is the shape of the Vickers indenter used in the hardness test?
Cylindrical
Spherical
Pyramid-shaped
Conical
What is the first step in preparing the testing machine for the Vickers hardness test?
Adjusting the height of the support table
Inserting the Vickers indenter into the mounting device
Placing the test piece on the support table
Rotating the microscope lens into position
How is the test piece positioned for the hardness test?
By rotating the microscope lens
By moving the test piece around on the support table
By pressing the start button
By adjusting the height of the support table
What happens after the start button is pushed in the Vickers hardness test?
The test piece is moved to the correct spot
The hardness value is displayed on the screen
The microscope lens rotates into position
The diamond pyramid indenter touches the test piece surface
What is the purpose of the control knob during the measurement of the indentation?
To adjust the height of the support table
To place measuring lines at the corners of the indentation
To rotate the microscope lens
To press the start button
What is displayed on the screen after the indentation is made?
The length of the diagonals
The hardness value
The magnified indentation
The test force value
How is the Vickers hardness value calculated?
By dividing the test force by the length of the diagonals
By multiplying the test force by the area of the indentation
By dividing the test force by the area of the indentation
By adding the test force to the area of the indentation
What is the final step in the Vickers hardness test process?
Rotating the microscope lens into position
Pressing the input key to calculate the hardness value
Placing the test piece on the support table
Adjusting the height of the support table
Where is the Vickers hardness value displayed after calculation?
Bottom left corner of the screen
Top right corner of the screen
Bottom right corner of the screen
Center of the screen
