MCQOPTIONS
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MCQOPTIONS
This section includes 98 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Maximum Principal Stress Theory is not good for brittle materials. |
| A. | True |
| B. | False |
| Answer» C. | |
| 52. |
If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape? |
| A. | Rectangle |
| B. | Square |
| C. | Circle |
| D. | Ellipse |
| Answer» C. Circle | |
| 53. |
If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 10N/mm². Find the inclination of the plane in which shear stress is maximal. |
| A. | 45’ |
| B. | 30’ |
| C. | 60’ |
| D. | 15’ |
| Answer» B. 30’ | |
| 54. |
If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm²Find the maximum amount of shear stress to which the body is subjected. |
| A. | 22.4mm |
| B. | 25mm |
| C. | 26.3mm |
| D. | 27.2mm |
| Answer» B. 25mm | |
| 55. |
If joint is to fail by crushing of socket collar then estimate the diameter of socket collar. Given Permissible compressive stress= 126.67 N/mm².; Spigot dia=65mm; thickness 0f collar=15mm |
| A. | 131mm |
| B. | 139mm |
| C. | 141mm |
| D. | 149mm |
| Answer» B. 139mm | |
| 56. |
Determine the width of the cotter used in cotter joint connecting two rods subjected to axial load of 50kN and permissible shear stress in cotter is 50N/(mm² ). Given thickness of cotter=10mm |
| A. | 5omm |
| B. | 100mm |
| C. | 150mm |
| D. | 25mm |
| Answer» B. 100mm | |
| 57. |
Which of the following is not a part of cotter joint? |
| A. | Socket |
| B. | Spigot |
| C. | Cotter |
| D. | Collar |
| Answer» E. | |
| 58. |
Can the cotter joint be used to connect slide spindle and fork of valve mechanism? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 59. |
Cotter joint is used when the members are subjected to which type of stresses? |
| A. | Axial tensile |
| B. | Axial compressive |
| C. | Axial tensile or compressive |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 60. |
Hot rolled components have better surface finish than cold rolled components |
| A. | True |
| B. | False |
| Answer» C. | |
| 61. |
Hot working or cold working, which reduces strain hardening and residual stresses. |
| A. | Hot working |
| B. | Cold working |
| C. | Both have equal effect |
| D. | Impossible to detect |
| Answer» B. Cold working | |
| 62. |
The temperature at which new stress free grains are formed in the metal is called the ______ temperature. |
| A. | Recrystallization |
| B. | Crystallization |
| C. | Solidification |
| D. | None of the mentioned |
| Answer» B. Crystallization | |
| 63. |
Tolerance for a shaft of 50mm diameter as the basic size, with the fundamental deviation denoted by g and tolerance of grade 7 is represented as? |
| A. | g50,7 |
| B. | 50g7 |
| C. | 7g50 |
| D. | None of the mentioned |
| Answer» C. 7g50 | |
| 64. |
How many grades of tolerances are there according to BIS system fits and tolerances? |
| A. | 12 |
| B. | 14 |
| C. | 16 |
| D. | 18 |
| Answer» E. | |
| 65. |
Which of the following are true for fundamental deviation? |
| A. | Gives location of tolerance zone |
| B. | Capital letter is used for both holes and shafts |
| C. | Small letter is used for both holes and shaft |
| D. | None of the mentioned |
| Answer» B. Capital letter is used for both holes and shafts | |
| 66. |
The description of tolerances consists of two parts namely? |
| A. | Fundamental deviation and magnitude of tolerance |
| B. | Magnitude of deviation and magnitude of tolerance |
| C. | Mean deviation and magnitude of tolerance |
| D. | Fundamental deviation and tolerance |
| Answer» B. Magnitude of deviation and magnitude of tolerance | |
| 67. |
Which of the following are true for system of tolerances to the shaft and the hole? |
| A. | In hole-basis system, various shafts are associated with a single hole |
| B. | In hole-basis system as well as shaft-basis system, various shafts are associated with multiple holes |
| C. | In shaft-basis system, various shafts are associated with a single hole |
| D. | None of the mentioned |
| Answer» B. In hole-basis system as well as shaft-basis system, various shafts are associated with multiple holes | |
| 68. |
In this case, tolerance zone of hole is entirely below that of the shaft. |
| A. | Clearance |
| B. | Interference |
| C. | Enjoining |
| D. | Non of the mentioned |
| Answer» C. Enjoining | |
| 69. |
Which of the following always provides a positive clearance between the hole and the shaft over the entire range of tolerances? |
| A. | Clearance |
| B. | Transition |
| C. | Interference |
| D. | None of the mentioned |
| Answer» B. Transition | |
| 70. |
Maximum carbon content in welding is usually limited to |
| A. | 0.22% |
| B. | 0.8% |
| C. | 1.5% |
| D. | 2% |
| Answer» B. 0.8% | |
| 71. |
Among casting, forging and forging which has the slowest rate of production? |
| A. | Casting |
| B. | Forging |
| C. | Machining |
| D. | All have equal rate of production |
| Answer» D. All have equal rate of production | |
| 72. |
In forging, metal is in which of the following stage? |
| A. | Elastic |
| B. | Plastic |
| C. | Can be in any stage |
| D. | Rigid |
| Answer» C. Can be in any stage | |
| 73. |
Which process allows controlling grain structure of the product? |
| A. | Casting |
| B. | Forging |
| C. | None of the mentioned |
| D. | Die Casting |
| Answer» C. None of the mentioned | |
| 74. |
Shot blasting process improves the endurance limit of the component. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 75. |
In alloy 4450, 4 represents? |
| A. | Silicon |
| B. | Aluminium |
| C. | Manganese |
| D. | Zinc |
| Answer» B. Aluminium | |
| 76. |
In alloy 4450, 2nd digit represents? |
| A. | average percentage of major alloying elements, halved and rounded off |
| B. | average percentage of major alloying elements |
| C. | average percentage of minor alloying elements, halved and doubled |
| D. | average percentage of minor alloying elements |
| Answer» B. average percentage of major alloying elements | |
| 77. |
Is it possible to completely relieve the residual stresses in a cast steel product? |
| A. | True |
| B. | False |
| Answer» C. | |
| 78. |
Which of the following are true for aluminium |
| A. | Low specific gravity |
| B. | Corrosion resistance |
| C. | High thermal conductivity |
| D. | All of the mentioned |
| Answer» E. | |
| 79. |
Which of the following statement is true |
| A. | Cast aluminium alloys are specified by a four digit system while wrought alloys by a five digit system |
| B. | Cast aluminium alloys are specified by a five digit system while wrought alloys by a four digit system |
| C. | Cast aluminium alloys are specified by a six digit system while wrought alloys by a five digit system |
| D. | Cast aluminium alloys are specified by a five digit system while wrought alloys by a six digit system |
| Answer» B. Cast aluminium alloys are specified by a five digit system while wrought alloys by a four digit system | |
| 80. |
Relative density of aluminium is roughly _______ of steel |
| A. | one-third |
| B. | one-fifth |
| C. | one-tenth |
| D. | equal |
| Answer» B. one-fifth | |
| 81. |
Paraffin wax is represented by |
| A. | C18H35 |
| B. | C18H40 |
| C. | C18H36 |
| D. | None of the mentioned |
| Answer» E. | |
| 82. |
A thermoplastic material has a linear polymer chain while a thermosetting plastic has a crosslinked polymer chain. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 83. |
Which of the following is a thermosetting polymer? |
| A. | PVC |
| B. | PTFE |
| C. | Nylon |
| D. | Polyesters |
| Answer» E. | |
| 84. |
Viscoelastic materials at low temperatures show no change in its strain with change in stress |
| A. | True |
| B. | False |
| Answer» C. | |
| 85. |
Hardness is |
| A. | Surface property |
| B. | Resistance to abrasion |
| C. | Depends upon resistance to plastic deformation of the material |
| D. | All of the mentioned |
| Answer» E. | |
| 86. |
Malleability increases with temperature while ductility decreases with temperature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 87. |
Which of the following are true for toughness |
| A. | Ability of material to absorb energy before fracture |
| B. | Measured by Izod & Charpy test |
| C. | Decreases with the increase in temperature |
| D. | All of the mentioned |
| Answer» E. | |
| 88. |
Modulus of resilience is defined as |
| A. | Strain energy per unit volume |
| B. | Strain energy per unit area |
| C. | Independent of strain energy |
| D. | None of the mentioned |
| Answer» B. Strain energy per unit area | |
| 89. |
Which of the following facts are true for resilience? |
| A. | Ability of material to absorb energy when deformed elastically |
| B. | Ability to retain deformation under the application of load or after removal of load |
| C. | Ability of material to absorb energy when deformed plastically |
| D. | None of the mentioned |
| Answer» B. Ability to retain deformation under the application of load or after removal of load | |
| 90. |
Which of the following is measure of stiffness? |
| A. | Modulus of elasticity |
| B. | Modulus of plasticity |
| C. | Resilience |
| D. | Toughness |
| Answer» B. Modulus of plasticity | |
| 91. |
Which of the following are true about plasticity? |
| A. | Permanent Deformation |
| B. | Ability to retain deformation under load or after removal of load |
| C. | Plastic deformation is greater than elastic deformation |
| D. | All of the mentioned |
| Answer» E. | |
| 92. |
All engineering materials are plastic. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 93. |
Proof strength is defined as the stress which will produce a permanent extension of how much percentage in the gauge length of the standard test specimen. |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» B. 0.2 | |
| 94. |
For the materials which do not exhibit a well-defined yield points, the yield strength is defined as the stress corresponding to a permanent set of how much percentage of gauge length? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» C. 0.3 | |
| 95. |
Yield strength is defined as the maximum stress at which a marked increase in elongation occurs without increase in________ |
| A. | Load |
| B. | Strength |
| C. | Toughness |
| D. | Hardness |
| Answer» B. Strength | |
| 96. |
Which of the following is the definition of Compliance? |
| A. | Inverse of Rigidity |
| B. | Inverse of Stiffness |
| C. | Proportional to elastic Limit |
| D. | None of the mentioned |
| Answer» C. Proportional to elastic Limit | |
| 97. |
Proportional Limit is defined as the stress at which the stress strain curves begins to deviate from the straight line |
| A. | True |
| B. | False |
| Answer» B. False | |
| 98. |
Which of the following parameters can be obtained by tension test of a standard specimen? |
| A. | Proportional Limit |
| B. | Yield Strength |
| C. | Percentage Reduction in area |
| D. | All of the mentioned |
| Answer» B. Yield Strength | |