Elements of Machine Design-02

  1. Fundamentals of design
  2. Design of joints, levers and offset links
  3. Design of shafts, keys and couplings
  4. Design of power screws
  5. Design of springs
  6. Design of bolted and welded joints
  7. Selection of anti-friction bearings and gears

Fundamentals of machine design

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1   During a tensile loading, the length of a steel rod is changed by 2 mm. If the original length of the rod has been 20 mm, what is the amount of strain induced
    (A)   0.1
    (B)   2
    (C)   0.9
    (D)   0.22
[showhide type=”button7c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
2   Stress on components is expressed in ….
    (A)   N/mm²
    (B)   kN/m²
    (C)   Pascal
    (D)   All of the above
[showhide type=”button7c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
3   Shear forces are —— forces.
    (A)   Aligned.
    (B)   Unaligned
    (C)   Perpendicular
    (D)   Parallel
[showhide type=”button7c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
4   The components having length in —— are usually Buckle.
    (A)   X- direction
    (B)   Y direction
    (C)   Z- direction
    (D)   X-Y direction
[showhide type=”button7c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
5   Flexure is also known as —–
    (A)   Distortion
    (B)   Failure
    (C)   Bending
    (D)   Twisting
[showhide type=”button7c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
6   Cyclic loads below significant load causes
    (A)   Bending
    (B)   Fatigue
    (C)   Wrapping
    (D)   Compression
[showhide type=”button7c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
7   Tensile stresses are applied —– to applied tensile force
    (A)   Parallel
    (B)   Perpendicular
    (C)   cross-sectional
    (D)   In same direction
[showhide type=”button7c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
8   Compressive forces are
    (A)   Towards the point
    (B)   Opposite to point
    (C)   Both
    (D)   Can’t say
[showhide type=”button7c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
9   Strength of material is maximum in
    (A)   Tension
    (B)   Compression
    (C)   Twisting
    (D)   Any of above
[showhide type=”button7c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
10   Stressed parts are always kept in tension.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button7c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
11   While designing a forging, the profile is selected such that the fibrous lines are parallel to the tensile forces and perpendicular to shear forces.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button7c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
12   Which of the following is not a reason to design and redesign a product?
    (A)   Optimum design
    (B)   Innovation
    (C)   Appearance
    (D)   None of the above
[showhide type=”button7c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
13   In design process, which process is followed after selecting the material?
    (A)   Selecting factor of safety
    (B)   Synthesis
    (C)   Analysis of forces
    (D)   Determining mode of failure
[showhide type=”button7c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
14   Which of the following is not a reason to design and redesign a product?
    (A)   Optimum design
    (B)   Innovation
    (C)   Appearance
    (D)   None of these
[showhide type=”button7c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
15   The following standard(s) is (are) used in Mechanical engineering design.
    (A)   Standards for materials
    (B)   Standard for testing of products
    (C)   Standards for Fits, Tolerances and surface finish of component
    (D)   All of the above
[showhide type=”button7c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
16   The following design process is also known as ‘over the wall’ process
    (A)   Sequential Design process
    (B)   Concurrent Engineering
    (C)   Both A and B
    (D)   None of the above
[showhide type=”button7c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
17   The elongation of a bar is 0.5 mm, when a tensile stress of 200 N/mm2 acts on it. Determine original length of a bar if modulus of elasticity is 150 x 103.
    (A)   375.93 mm
    (B)   300 mm
    (C)   360 mm
    (D)   None of the above
[showhide type=”button7c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
18   Deformation per unit length is called as ________
    (A)   strain
    (B)   stress
    (C)   modulus of elasticity
    (D)   none of the above
[showhide type=”button7c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
19   In design process, which process is followed after selecting the material?
    (A)   Selecting factor of safety
    (B)   Synthesis
    (C)   Analysis of forces
    (D)   Determining mode of failure.
[showhide type=”button7c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
20   Which of the following materials do not have a well-defined yield point?
    (A)   Heat treated steel
    (B)   Concrete
    (C)   Carbon fiber
    (D)   All of the above
[showhide type=”button7c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
21   In stress-strain diagram, up to proportional limit ______
    (A)   stress is inversely proportional to strain
    (B)   force is directly proportional to displacement
    (C)   stress is directly proportional to strain
    (D)   strain is directly proportional to stress
[showhide type=”button7c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
22   Factor of safety is the ratio of _________
    (A)   working stress and ultimate strength
    (B)   yield strength and endurance strength
    (C)   ultimate strength and yield strength
    (D)   yield strength and working stress
[showhide type=”button7c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
23   The ratio of endurance strength and allowable stress is used to determine FOS for _____
    (A)   fatigue loading
    (B)   static loading of brittle materials
    (C)   static loading of ductile materials
    (D)   all of the above
[showhide type=”button7c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
24   Which of the following is the numerator of factor safety formula?
    (A)   Working stress
    (B)   Shear stress
    (C)   Tensile stress
    (D)   Ultimate Stress
[showhide type=”button7c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
25   Which of the following can be the factor of safety for a dead load?
    (A)   6
    (B)   2
    (C)   4
    (D)   7
[showhide type=”button7c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
26   Which of the following can be the factor of safety for shock loading?
    (A)   11
    (B)   13
    (C)   4
    (D)   7
[showhide type=”button7c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
27   Factor of safety is used to find out the reliability of the design.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button7c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
28   What can understand by the factor of safety equal to one?
    (A)   It means that the structure will fail under load
    (B)   It means that the structure will only support the actual load
    (C)   it means that the structure will support more than the actual load
    (D)   There is no relation between factor safety and load application
[showhide type=”button7c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
29   For which of the following design factor of safety the design will work properly?
    (A)   0.1
    (B)   1
    (C)   2
    (D)   0.9
[showhide type=”button7c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
30   What is a safe factor of failure for a component which on failure can result in financial loss or serious injury?
    (A)   1
    (B)   2
    (C)   3
    (D)   4
[showhide type=”button7c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
31   Design factor for most aircraft structures is 2.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button8c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
32   What is the factor of safety under suddenly applied load?
    (A)   2 and 4
    (B)   4 and 8
    (C)   8 and 16
    (D)   None
[showhide type=”button8c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
33   Safety factor in case of a ductile material is
    (A)   Real stress/unit stress
    (B)   Ultimate stress/maximum stress
    (C)   Yield stress/ allowable stress
    (D)   None
[showhide type=”button8c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
34   Effect of higher factor of safety on cost of the material?
    (A)   Increases
    (B)   Decreases
    (C)   No change
    (D)   None
[showhide type=”button8c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
35   The factor of safety for a ductile material
    (A)   σyp/σallow
    (B)   (b)σult/σallow
    (C)   σult/σyp
[showhide type=”button8c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
36   Factor of safety is the ratio of —–
    (A)   allowable stress to critical stress
    (B)   critical stress to allowable stress
    (C)   normal stress to shear stress
    (D)   shear stress to normal stress
[showhide type=”button8c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
37   The factor of safety for—–
    (A)   steel and concrete are same
    (B)   steel is lower than that for concrete
    (C)   steel is higher than that for concrete
    (D)   none of the above
[showhide type=”button8c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
38   Design is concerned with——
    (A)   Selection of material
    (B)   Shape and size
    (C)   Arrangements of elements
    (D)   All of the above.
[showhide type=”button8c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
39   Is analysis of forces important in designing a machine element?
    (A)   Yes
    (B)   No
    (C)   May be
    (D)   Can’t say
[showhide type=”button8c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
40   In which of the following step we can change the size of member.
    (A)   Detailed drawing
    (B)   Modification
    (C)   Both A and B
    (D)   none of the above
[showhide type=”button8c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
41   Which of the following is not step of machine design?
    (A)   Recognition of need
    (B)   Mechanism
    (C)   Analysis of forces
    (D)   Safety of operation
[showhide type=”button8c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
42   To avoid failure which of the following is important.
    (A)   Reliability
    (B)   Wear resistance
    (C)   Strength
    (D)   None of the above
[showhide type=”button8c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
43   Need =>Mechanism =>Analysis of forces =>———=> Design of element.
    (A)   Modification
    (B)   Production
    (C)   Quality checking
    (D)   Material selection
[showhide type=”button8c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
44   Is quality checking part of machine designing?
    (A)   Yes
    (B)   No
    (C)   May be
    (D)   Can’t say
[showhide type=”button8c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
45   To selection of material——.
    (A)   Designer should have a deep knowledge about properties of material.
    (B)   Knowledge about properties is not important.
    (C)   Both A and B can be done.
    (D)   None of the above
[showhide type=”button8c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
46   What will happened if standard parts are used?
    (A)   Overall cost reduces
    (B)   Develops machine work effectively
    (C)   Both A and B
    (D)   None of the above
[showhide type=”button8c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
47   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 above
[showhide type=”button8c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
48   Yield strength is defined as the maximum stress at which a marked increases in elongation occurs without increases in
    (A)   Load
    (B)   Strength
    (C)   Toughness
    (D)   Hardness
[showhide type=”button8c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
49   Which of the following measuring the stiffness?
    (A)   Modulus of elasticity
    (B)   Modulus of plasticity
    (C)   Resilience
    (D)   Toughness
[showhide type=”button8c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
50   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 above
[showhide type=”button8c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
51   Malleability increases with temperature while ductility decreases with the temperature
    (A)   TRUE
    (B)   FALSE
[showhide type=”button8c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
52   Calculate the diameter of pin from shear consideration with maximum shear stress allowed is 40kN/mm² and an axial tensile force of 50kN is acting on the rod.
    (A)   40
    (B)   50
    (C)   60
    (D)   70
[showhide type=”button8c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
53   For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will be
    (A)   Increased
    (B)   Decreased
    (C)   Remains constant
    (D)   Can’t be determined. Varies from material to material
[showhide type=”button8c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
54   In which of the following case stress concentration factor is ignored?
    (A)   Ductile material under static load
    (B)   Ductile material under fluctuating load
    (C)   Brittle material under static load
    (D)   Brittle material under fluctuating load
[showhide type=”button8c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
55   Use of multiple notches in a V shaped flat plate will be
    (A)   Reduce the stress concentration
    (B)   Increase the stress concentration
    (C)   No effect
    (D)   Cannot be determined
[showhide type=”button8c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
56   Which of the following reduces the stress concentration?
    (A)   Use of multiple notches
    (B)   Drilling additional holes
    (C)   Removal of undesired material
    (D)   Each of the mentioned
[showhide type=”button8c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
57   Which of the following is measure of stiffness?
    (A)   Modulus of elasticity
    (B)   Modulus of plasticity
    (C)   Resilience
    (D)   Toughness
[showhide type=”button8c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
58   irregularities present in the component and no changes of the cross section.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button8c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
59   Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross-section and highest value of actual stress near discontinuity.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button8c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
60   If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is?
    (A)   2
    (B)   3
    (C)   4
    (D)   1
[showhide type=”button8c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
61   For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will——
    (A)   Increase
    (B)   Decrease
    (C)   Remains constant
    (D)   can’t be determined. Varies from material to material
[showhide type=”button9c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
62   Is it logical to use fluid analogy to understand the phenomenon of stress concentration?
    (A)   TRUE
    (B)   FALSE
[showhide type=”button9c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
63   Use of multiple notches in a V shaped flat plate will
    (A)   Reduce the stress concentration
    (B)   Increase the stress concentration
    (C)   No effect
    (D)   Cannot be determined
[showhide type=”button9c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
64   A flat plate 30mm wide and “t” mm wide is subjected to a tensile force of 5kN. The plate has a circular hole of diameter 15mm with the center coinciding with the diagonal intersection point of the rectangle. If stress concentration factor=2.16, find the thickness of the plate if maximum allowable tensile stress is 80N/mm².
    (A)   8mm
    (B)   9mm
    (C)   10mm
    (D)   12mm
[showhide type=”button9c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
65   The fatigue stress concentration factor is defined as
    (A)   The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
    (B)   The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
    (C)   The product of the endurance limits with and without stress concentration
    (D)   All of the above.
[showhide type=”button9c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
66   Stress may be defined as _________
    (A)   Force per unit volume
    (B)   Force per unit length
    (C)   Force per unit area
    (D)   None of these
[showhide type=”button9c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
67   The forces acting on the bar as shown in the given figure introduce _________?
    (A)   Tensile stress
    (B)   Compressive stress
    (C)   Shear stress
    (D)   None of these
[showhide type=”button9c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
68   The property by which a body returns to its original shape after removal of the force is called __________
    (A)   Plasticity
    (B)   Elasticity
    (C)   Ductility
    (D)   Malleability
[showhide type=”button9c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
69   Which law is also called as the elasticity law, which states that stress is proportional to the strain within the elastic limit?
    (A)   Bernoulli’s law
    (B)   Stress law
    (C)   Hooke’s law
    (D)   Poisson’s law
[showhide type=”button9c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
70   A member which does not regain its original shape after removal of the load producing deformation is said __________
    (A)   Plastic
    (B)   Elastic
    (C)   Rigid
    (D)   None of the mentioned
[showhide type=”button9c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
71   As the elastic limit reaches, tensile strain __________
    (A)   Increases more rapidly
    (B)   Decreases more rapidly
    (C)   Increases in proportion to the stress
    (D)   Decreases in proportion to the stress
[showhide type=”button9c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
72   The dimension of strain is?
    (A)   LT-2
    (B)   N/m2
    (C)   N
    (D)   Dimensionless
[showhide type=”button9c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
73   Live loads, with time can vary in_________
    (A)   Magnitude
    (B)   Position
    (C)   Neither position nor magnitude
    (D)   Position as well as magnitude
[showhide type=”button9c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
74   What is the first step in the ‘General procedure of machine design’?
    (A)   Analysis of forces
    (B)   Material Selection
    (C)   Need or aim
    (D)   Detailed drawing
[showhide type=”button9c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
75   Sizes of machine components are decided in which stage of general procedure of machine design?
    (A)   Material selection
    (B)   Detail drawing
    (C)   Design of element
    (D)   Analysis of forces
[showhide type=”button9c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
76   Detailed drawings of designed machine elements are needed by workers to machine/fabricate/assemble the machine elements. Is this statement true.
    (A)   TRUE
    (B)   FALSE
[showhide type=”button9c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
77   When you design a machine element you should make use of standard elements as much as possible?
    (A)   TRUE
    (B)   FALSE
[showhide type=”button9c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
78   A machine designer should consider the following factors among others
    (A)   Workshop facilities
    (B)   Selection of materials
    (C)   Types of loads and stresses
    (D)   All of the above
[showhide type=”button9c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
79   Compressive stress acting on the contact area between two components having no relative motion between them is known as crushing stress
    (A)   TRUE
    (B)   FALSE
[showhide type=”button9c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
80   At the neutral axis, bending stress is _____
    (A)   Minimum
    (B)   Maximum
    (C)   Zero
    (D)   Constant
[showhide type=”button9c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
81   What is the product of force and radius?
    (A)   Twisting shear
    (B)   Turning shear
    (C)   Turning moment
    (D)   Tilting moment
[showhide type=”button9c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
82   What is the unit of the Stress and strain
    (A)   N/mm2 and mm
    (B)   N and mm 
    (C)   N/mm and mm2
    (D)   N/mm2 and No unit
[showhide type=”button9c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
83   Stress is
    (A)   External force
    (B)   Internal resistive force
    (C)   Axial force
    (D)   Radial force
[showhide type=”button9c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
84   The stress which acts in a direction perpendicular to the area is called ____________
    (A)   Shear stress
    (B)   Normal stress
    (C)   Thermal stress
    (D)   None of the mentioned
[showhide type=”button9c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
85   Which of these are types of normal stresses?
    (A)   Tensile and compressive stresses
    (B)   Tensile and thermal stresses
    (C)   Shear and bending
    (D)   Compressive and plane stresses
[showhide type=”button9c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
86   The stress induced in a body, when subjected to two equal and opposite forces which are acting tangentially across the resisting section resulting the shearing of the body across its section is called ____________
    (A)   Bending stress
    (B)   Compressive stress
    (C)   Shear strain
    (D)   Shear stress
[showhide type=”button9c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
87   Following are the basic types of stress except
    (A)   Tensile stress
    (B)   Compressive stress
    (C)   Shear stress
    (D)   Volumetric stress
[showhide type=”button9c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
88   The deformation per unit length is called
    (A)   Strain
    (B)   Stress
    (C)   Elasticity
    (D)   None of these
[showhide type=”button9c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
89   The ability of the material to deform without breaking is called
    (A)   Elasticity
    (B)   Plasticity
    (C)   Creep
    (D)   None of these
[showhide type=”button9c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
90   The stress at which extension of a material takes place more quickly as compared to increase in load, is called
    (A)   No elastic zone
    (B)   Plastic point
    (C)   Yield point
    (D)   Breaking point
[showhide type=”button9c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
91   A perfectly elastic body
    (A)   Can move freely
    (B)   Has perfectly smooth surface
    (C)   Is not deformed by any external surface
    (D)   Recovers its original size and shape when the deforming force is removed.
[showhide type=”button10c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
92   When a section is subjected to two equal and opposite forces tangentially to the section, the stress produced is known as
    (A)   Tensile stress
    (B)   Lateral stress
    (C)   Shear stress
    (D)   No stress
[showhide type=”button10c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
93   In the stress strain diagram shown in the figure, what does the letter D represent?
    (A)   Upper yield point
    (B)   Lower yield point
    (C)   Ultimate limit
    (D)   Braking point
[showhide type=”button10c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
94   Match the materials with the stress-strain curves in the given figure?
    (A)   A- Cast iron, B- Plastic, C- Mild steel
    (B)   A- Cast iron, B- Mild steel, C- Plastic
    (C)   A- Mild steel, B- Cast iron, C- Plastic
    (D)   A- Plastic, B- Cast iron, C- Mild steel
[showhide type=”button10c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
95   An example of ductile material is
    (A)   Cast iron
    (B)   Rubber
    (C)   Glass
    (D)   Mild steel
[showhide type=”button10c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
96   An example of brittle material
    (A)   Cast iron
    (B)   Rubber
    (C)   Glass
    (D)   Mild steel
[showhide type=”button10c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
97   Hooke’s law holds good up to
    (A)   Yield point
    (B)   Limit of proportionality
    (C)   Breaking point
    (D)   Elastic limit
[showhide type=”button10c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
98   Strain is defined as the ratio of
    (A)   Change in volume to original volume
    (B)   Change in length to original length
    (C)   Change in cross-sectional are to original cross-sectional area
    (D)   Any one of the above
[showhide type=”button10c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]
99   It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called
    (A)   Internal resistance
    (B)   Tensile stress
    (C)   Compressive stress
    (D)   Working stress
[showhide type=”button10c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
100   A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
    (A)   Uniform throughout
    (B)   Increase uniformly
    (C)   First increase and then decrease
    (D)   Increase uniformly first and then increase rapidly
[showhide type=”button10c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option D [/showhide]

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