Mechanical Behaviour & Testing of Materials MCQ (Multiple Choice Questions)

Here are 1000 Mechanical Behaviour & Testing of Materials MCQ (Chapterwise).

1. Which of the following machine is used to measure compressive strength?
a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine
View Answer

Answer: a
Explanation: Universal testing machine is used to measure compressive strength. Erichsen machine is used to measure formability and Impact testing machine for Impact strength. Fatigue testing machine is used for measuring fatigue strength.

2. Which of the following instrument is used to measure formability?
a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine
View Answer

Answer: d
Explanation: Erichsen machine is used to measure formability of sheet metal. UTM is used to measure strength. Fatigue testing machine is used to measure fatigue strength and impact testing machine to measure impact strength.

3. Which of the following device is used to measure hardness in Mohs?
a) Rockwell tester
b) Sclerometer
c) Universal testing machine
d) Gyro meter
View Answer

Answer: b
Explanation: Scratch hardness is measured with the help of sclerometer. This device gives hardness in Mohs. Universal testing machine is used to measure tensile properties.

4. What is the cross-section of standard specimen for impact testing?
a) 10mm × 10mm
b) 20mm × 60mm
c) 10mm × 40mm
d) 45mm × 60mm
View Answer

Answer: a
Explanation: Standard specimen cross section may be round or square. When it is square, it is kept 10mm×10mm. V-notch may be in middle.

5. Which of the following test is more preferred for testing hardness of electroplated surface?
a) Microhardness test
b) Dynamic hardness test
c) Macro hardness test
d) Scratch hardness test
View Answer

Answer: a
Explanation: Hardness of electroplated surface is tested by microhardness test. It may be chrome plating.
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6. Which of the following is a drawback of ultrasonic testing?
a) Shape restriction
b) Low depth
c) Higher errors
d) High sensitivity
View Answer

Answer: d
Explanation: Ultrasonic testing can be performed on any shape specimen. It has high sensitivity. Higher depth can be tested.

7. Is ultrasonic testing is destructive testing?
a) False
b) True
View Answer

Answer: a
Explanation: Ultrasonic testing is non-destructive testing. It can be performed on finished and assembled materials.

8. Which of the following factor affects ductile-brittle transition behavior the most?
a) Triaxiality
b) Notching
c) Temperature
d) Strain rate
View Answer

Answer: c
Explanation: Temperature is the most important factor among others. The temperature at which this behaviour changes sharply, is called ductile-brittle transition temperature.

9. Which of the following material shows a gradual rising R-curve with failure governed by R-curve behaviour?
a) Low toughness and strength
b) High toughness and strength
c) Low toughness / strength
d) High toughness / low strength
View Answer

Answer: d
Explanation: Materials are of 2 types. High toughness/low strength and low toughness/high strength. The former one shows gradual rising R-curve with failure governed by R-curve behaviour.

10. With an increase in strain rate, ductility ______ and tensile strength _____
a) Decreases, decreases
b) Decreases, increases
c) Increases, increases
d) Increases, decreases
View Answer

Answer: b
Explanation: With increase in strain rate, ductility of materials decreases. It is because material shows brittle behaviour. Tensile strength of material increases.

11. Largest size flaw can be determined using which of the following test?
a) Shore test
b) Brinell test
c) Leeb test
d) NDT
View Answer

Answer: d
Explanation: Largest size flaw can be determined using NDT. X-ray radiography or ultrasound testing can be used. Other tests above gives hardness.

12. Yield and flow strength at lower plastic strain is more dependent on _____ than ______
a) Strain rate, temperature
b) Temperature, tensile strength
c) Tensile strength, strain rate
d) Strain rate, tensile strength
View Answer

Answer: d
Explanation: Yield and flow strength at lower plastic strain are more dependent on strain rate than tensile strength. In shaping processes strain rates are higher. It can lead to unexpected mechanical behaviour.

13. R-curve behaviour is a material related property.
a) False
b) True
View Answer

Answer: a
Explanation: R-curve behaviour is not a material related property. It depends on geometry.

14. The slope of the stress-strain curve in the plastic range is _____
a) Bauschinger effect
b) Resolved shear stress
c) True strain
d) Rate of strain hardening
View Answer

Answer: d
Explanation: Strain hardening behaviour is represented by stress-strain curve. The slope of this curve is rate of strain hardening. It is the reason behind calling these curves ‘hardening curves’.
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15. At strain rates _____ behaviour of the material is characterized by creep.
a) High, 104 per second
b) High, 10-4 per second
c) Low, 104 per second
d) Low, 10-4 per second
View Answer

Answer: d
Explanation: At lower strain rates behaviour of the material is characterized by creep. These strain rates are less than about 10-4 per second. For higher strain rates materials behave in a different manner.

16. Radiography don’t give ________
a) Pores in weldment
b) Blow holes in casting
c) Hardness
d) Thickness of material
View Answer

Answer: c
Explanation: Radiography is used for detecting internal defects mainly. Blow holes, voids and porosity are best examples.

17. ECI is only used for ferromagnetic materials.
a) False
b) True
View Answer

Answer: a
Explanation: ECI doesn’t require magnetic conduction. It is effective for both ferromagnetic and non-magnetic materials.

18. Standard penetration depth varies from material to material.
a) False
b) True
View Answer

Answer: b
Explanation: Standard penetration depth is different for different materials. It is not even constant for a given material.

19. Which of the following material can’t be tested by MPI?
a) Mg
b) Fe
c) Co
d) Ni
View Answer

Answer: a
Explanation: Mg is non-ferromagnetic material. So it can’t be tested by MPI. Co, Fe and Ni are ferromagnetic.
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20. What is the Curie point for most of the ferrous magnetic materials?
a) 460˚C
b) 760˚C
c) 240˚C
d) 557˚C
View Answer

Answer: b
Explanation: The Curie point for most of ferrous magnetic materials is760˚C. Above it, these don’t show ferromagnetism.

21. Which of the following materials can be tested by MPI?
a) Ferromagnetic
b) Magnetic
c) Non-magnetic
d) Paramagnetic
View Answer

Answer: a
Explanation: MPI works only on materials which can be magnetized easily. These are ferromagnetic materials.

22. As the height of rebound enhances the material’s hardness ___________
a) Remains constant
b) Decreases
c) Increases
d) First Increases and then decreases
View Answer

Answer: c
Explanation: As the height of rebound increase, the material becomes harder. The size of the indentation decreases. It is because of less kinetic energy loss.

23. What is the Knoop hardness of diamond?
a) 2000 HK
b) 4000 HK
c) 7000 HK
d) 5000 HK
View Answer

Answer: c
Explanation: Knoop hardness of diamond is 7000 HK. Brittle materials are tested by Knoop test. Vickers hardness of diamond is 10,000 HV.

24. Which of the following scale is used to test softer materials?
a) A
b) B
c) C
d) D
View Answer

Answer: b
Explanation: B scale is used for testing softer materials. 1.6 mm steel ball is used for indentation. Major load of 100 kg is used.

25. What test force is applied for nonferrous materials in Brinell test?
a) 500 kgf
b) 1000 kgf
c) 3000 kgf
d) 50 kgf
View Answer

Answer: a
Explanation: Nonferrous materials are tested by lower force in Brinell test. It is about 500 kgf.

26. For higher __________ indentation hardness is also higher.
a) Stiffness
b) Ductility
c) Plasticity
d) Maleabitility
View Answer

Answer: a
Explanation: For a material having high stiffness, hardness will be higher. Stiffness is resistance against bending. Ductility if is higher of a material, hardness will be low.

27. __________ is used for measuring the hardness of brittle materials.
a) Shore hardness test
b) Vickers hardness test
c) Brinell hardness test
d) Rockwell hardness test
View Answer

Answer: n
Explanation: Vickers hardness test Is used for measuring the hardness of brittle materials. It produces shallow indentation. So not much plastic deformation is produced.

28. Which of the following material has the lowest scratch hardness?
a) Gypsum
b) Talc
c) Topaz
d) Diamond
View Answer

Answer: b
Explanation: Talc has the lowest scratch hardness. It is 1 Mohs. Diamond, gypsum and topaz have hardness 10, 2 and 8 Mohs respectively.

29. With increase in stacking fault energy, fatigue strength of material __________
a) Remains constant
b) Decreases
c) Increases
d) First Increases and then decreases
View Answer

Answer: b
Explanation: For materials with high stacking fault energy, dislocations can easily cross glide. It helps in the development of extrusion and intrusions. It decreases fatigue strength.

30. Which of the following materials is predominated by thermal failure?
a) Actual
b) Nylon
c) PMMA
d) Polycarbonate
View Answer

Answer: b
Explanation: Nylon falls under third group materials. These tend to fail predominantly by thermal failure.


Chapterwise Multiple Choice Questions on Mechanical Behaviour & Testing of Materials

Mechanical Behaviour & Testing of Materials MCQ - Multiple Choice Questions and Answers

Our 1000+ MCQs focus on all topics of the Mechanical Behaviour & Testing of Materials subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.
  1. Crystal Imperfections
  2. Mechanical Properties
  3. Dislocation Theory
  4. Deformation of Metals
  5. Strengthening Mechanisms in Materials
  6. Fracture
  7. Tensile Behaviour
  8. Creep Behaviour
  9. Ductile-Brittle Transition Behaviour
  10. Fatigue Behaviour
  11. Hardness Testing
  12. Non-Destructive Testing

1. Mechanical Behaviour & Testing of Materials MCQ on Crystal Imperfections

The section contains Mechanical Behaviour & Testing of Materials multiple choice questions and answers on crystal structure basics, point and line imperfections, surface and volume imperfections.

  • Basics of Crystal Structures
  • Point Imperfections
  • Line Imperfections
  • Surface Imperfections
  • Volume Imperfections
  • 2. Mechanical Behaviour & Testing of Materials Multiple Choice Questions on Mechanical Properties

    The section contains Mechanical Behaviour questions and answers on tensile strength, yield and compressive strength, ductility, malleability, stiffness, creep strength, toughness, hardness, formability, structure mechanical property relation, impact and fatigue strength.

  • Tensile Strength
  • Yield Strength
  • Compressive Strength
  • Ductility
  • Malleability
  • Stiffness
  • Toughness
  • Creep Strength
  • Hardness
  • Impact Strength
  • Fatigue Strength
  • Formability
  • Structure Mechanical Property Relation
  • 3. Mechanical Behaviour & Testing of Materials MCQ on Dislocation Theory

    The section contains Mechanical Behaviour MCQs on ideal and real crystals shear strength, dislocations geometry, burgers vector, dislocations movement and elastic properties, peierls nabarro stress, dislocation multiplication and intersection, ceramics dislocation, unit and partial dislocations.

  • The Shear Strength of Ideal and Real Crystals
  • Geometry of Dislocations
  • Burgers Vector
  • Movement of Dislocations
  • Elastic Properties of Dislocations
  • Forces Between Dislocations
  • Unit Dislocations and Partial Dislocations
  • Peierls-Nabarro Stress and Dislocation Width
  • Dislocation Multiplication
  • Dislocation Intersection
  • Dislocations in Ceramics
  • 4. Mechanical Behaviour & Testing of Materials Multiple Choice Questions on Deformation of Metals

    The section contains Mechanical Behaviour multiple choice questions and answers on elastic and plastic deformation, twinning deformation, ceramics and polymer deformation behaviour.

  • Elastic Deformation
  • Plastic Deformation
  • Deformation by Twinning
  • Deformation Behaviour in Ceramics and Polymers
  • 5. Testing of Materials MCQ on Strengthening Mechanisms in Materials

    The section contains Mechanical Behaviour & Testing of Materials questions and answers on grain boundary and solid solution strengthening, precipitation hardening, dispersion and strain hardening, martensitic and composite strengthening, strengthening mechanisms applications, plastics and ceramics strengthening.

  • Grain Boundary Strengthening
  • Solid Solution Strengthening
  • Precipitation Hardening
  • Dispersion Hardening
  • Strain Hardening
  • Martensitic Strengthening
  • Composite Strengthening
  • Strengthening of Plastics
  • Strengthening of Ceramics
  • Applications of Strengthening Mechanisms
  • 6. Mechanical Behaviour & Testing of Materials Multiple Choice Questions on Fracture

    The section contains Mechanical Behaviour & Testing of Materials MCQs on ductile fracture and its mechanism, fracture affecting factors, brittle fracture and its mechanism.

  • Ductile Fracture
  • Mechanism of Ductile Fracture
  • Brittle Fracture
  • Mechanism of Brittle Fracture
  • Factors Affecting the Type of Fracture
  • 7. Mechanical Behaviour Multiple Choice Questions on Tensile Behaviour

    The section contains Mechanical Behaviour multiple choice questions and answers on tension test, stress strain curves, tensile properties, yield point phenomenon and variables affecting tensile properties.

  • Tension Test and Stress Strain Curve
  • Tensile Properties
  • True Stress Strain Curve
  • Yield Point Phenomenon
  • Variables Affecting Tensile Properties
  • 8. Mechanical Behaviour & Testing of Materials MCQ on Creep Behaviour

    The section contains Mechanical Behaviour questions and answers on creep curve, creep at low and high temperatures, equicohesive temperature, creep deformation mechanism, creep behaviour factors and resistant materials.

  • Creep Curve
  • Creep at Lower and High Temperatures
  • Equicohesive Temperature
  • Deformation at Elevated Temperature
  • Mechanism of Creep Deformation
  • Factors Affecting Creep Behaviour
  • Creep Resistant Materials
  • 9. Mechanical Behaviour Multiple Choice Questions on Ductile-Brittle Transition Behaviour

    The section contains Mechanical Behaviour MCQs on ductile brittle transition behaviour, notch bar impact test, transition temperature and its significance, fracture and ceramics toughness.

  • Ductile-Brittle Transition Behaviour
  • Transition Temperature and Its Significance
  • Notch-Bar Impact Test
  • Variables Affecting Impact Value
  • Fracture Toughness
  • Toughening in Ceramics
  • 10. Mechanical Behaviour & Testing of Materials Multiple Choice Questions on Fatigue Behaviour

    The section contains Mechanical Behaviour muliple choice questions and answers on stress cycles, fatigue test, iron and steel fatigue behaviour, fatigue mechanism and low cycle fatigue.

  • Stress Cycles
  • Fatigue Test
  • Fatigue Behaviour in Iron and Steel
  • Mechanism of Fatigue
  • Low Cycle Fatigue
  • Variables Affecting Fatigue
  • 11. Testing of Materials MCQ on Hardness Testing

    The section contains Testing of Materials questions and answers on scratch hardness, indentation hardness, hardness test like brinell hardness test, vickers and rockwell hardness test, microhardness test and dynamic hardness testing.

  • Scratch Hardness
  • Indentation Hardness
  • Brinell Hardness Test
  • Vickers Hardness Test
  • Rockwell Hardness Test
  • Microhardness Test
  • Dynamic Hardness Testing
  • 12. Mechanical Behaviour & Testing of Materials MCQ on Non-Destructive Testing

    The section contains Testing of Materials MCQs on liquid penetrant and magnetic particle inspection, radiographic inspection, eddy current inspection and ultrasonic testing.

  • Liquid Penetrant & Magnetic Particle Inspection
  • Eddy Current Inspection & Ultrasonic Testing
  • Radiographic Inspection
  • If you would like to learn "Mechanical Behaviour & Testing of Materials" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

    Wish you the best in your endeavor to learn and master Mechanical Behaviour & Testing of Materials!

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