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This mock test of Test: Strength Of Material (Level -II)- 2 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam.
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QUESTION: 1

In a strained material, normal stresses on two mutually perpendicular planes are s_{x} and s_{y} (both a like) accompanied by a shear stress t_{xy}. One of the principal stresses will be zero, only it

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QUESTION: 2

In a Mohr's circle, the radius of the circle is taken as

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QUESTION: 3

Principal strains at a point are + 100 × 10^{–6} and – 200 × 10^{–6}. What is the maximum shear strain at the point ?

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QUESTION: 4

In a strained material one of the principal stresses is twice the other. The maximum shear stress in the same case is t_{max}. Then, what is the value of the maximum principal stress ?

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QUESTION: 5

For a general two dimensional stress system, what are the coordinates of the centre of Mohr's circle?

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QUESTION: 6

The principal strains at a point in a body, under biaxial state of stress, are 1000 × 10^{–6 }and -600×10^{–6}. What is the maximum shear strain at that point ?

Solution:

Shear strain = e_{max} - e_{min}

= 1000 x 10^{–6} -(-600 x 10^{–6})

= 1600 x 10^{–6}

QUESTION: 7

If the principal stresses and maximum shearing stresses are of equal numerical value at a point in a stressed body, the state of stress can be termed as

Solution:

QUESTION: 8

The state of plane stress at a point in a loaded member is given by:

s_{x} = + 800 MPa

s_{y }= + 200 MPa

t_{xy} = ± 400 MPa

The maximum principal stress and maximum shear stress are given by:

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QUESTION: 9

Which of the following figures may represent Mohr's circle?

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QUESTION: 10

Auto frettage is the method of

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QUESTION: 11

From design point of view, spherical pressure vessels are preferred over cylindrical pressure vessels because they

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QUESTION: 12

In a thick cylinder pressurized from inside, the hoop stress is maximum at

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QUESTION: 13

A thin cylinder with closed lids is subjected to internal pressure and suported at the ends as shown in figure. The state of stress at point X is a s represented as

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QUESTION: 14

A thin cylinder with both ends closed is subjected to internal pressure p. The longitudinal stress atthe surface has been calculated as s_{o}. maximum shear stress at the surface will be equal to

Solution:

Since, S0 is the longitudinal stress in a thin cylinder then 2S0 will be the hoop stress

Maximum (absolute) shear stress

=1/2(maximum principal stress)

=1/2(hoop stress)

=1/2(2S0)

=S0

QUESTION: 15

If a thick cylindrical shell is subjected to internal pressure. then hoop stress, radial stress and longitudinal stess at point in the thickness will be

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QUESTION: 16

The commonly used technique of strengthening thin pressure vessels is

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QUESTION: 17

Auto-frettage is a method of

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QUESTION: 18

Where does the maximum hoop stress in a thick cylinder under external pressure occur ?

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QUESTION: 19

A seamless pipe of diameter d m is to carry fluid under a pressure of P kN/cm^{2}. The necessary thickness t of metal in cm, if the maximum stress is not to exceeds kN/cm^{2} is

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QUESTION: 20

Constant bending moment over span 'l' will occur in

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QUESTION: 21

The bending moment (M) is constant over a length segment (I) of a beam the shearing force will also be constant over this length and is given by

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QUESTION: 22

The given figure shows a cantilever of span L subjected to a concentrated load P and a moment M at the free end. Deflection a the free end is given by

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QUESTION: 23

For a cantilever beam of length 'L' flexural rigidity El ad loaded at its free end by a concentrated load W, match List-I with List-II and select the correct answer using the codes below the lists:

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QUESTION: 24

A beam, built in both ends, carries a uniformly distributed load over its entire span as shown in

figure. Which one of the diagrams given below represents bending moment distribution along the length of the beam?

Solution:

QUESTION: 25

A simply supported beam has equal overhanging lengths and carries equal concentrated loads P at ends. Bending moment over the length between the supports

Solution:

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