List of top Mechanical Engineering Questions on Mechanics of Materials asked in CUET (PG)

The strain energy stored in a body due to a suddenly applied load compared to when it is applied gradually is

The following conditions must be satisfied for a perfect truss (m = number of members, j = number of joints):

A principal plane is a plane of

At a point on the beam where shear force changes signs, the bending moment at that point is

The polar section modulus for a circular shaft of diameter "d" is:

All the failure theories give nearly the same results when

According to maximum shear stress failure theory, yielding in material occurs when:

Match List-I with List-II

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If a helical spring is halved in length, its spring stiffness remains:

The power required for turning a mild steel rod is found to be 0.1 kW/cm³/min. The maximum power available at the machine spindle is 4 kW. Assuming a cutting speed of 38 m/min and feed rate of 0.32 mm/rev, the maximum metal removal rate and depth of cut are respectively:

In a plane stress system, two principal stresses are 785 N/mm² and 115 N/mm². If the system just causes yielding, what is the uni-axial yield stress of the material according to the Von Mises criterion:

Consider the following statements
(A) For the two shafts connected in parallel, the angle of twist of each shaft is same.
(B) For the two shafts connected in series, the shear stress in each shaft is same.
(C) The shear stress in a circular shaft under torsion varies linearly.
(D) The shear stress at the centre of a circular shaft under torsion is zero.
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Consider the following statements about shear stresses in beams A The shear stress at neutral axis of a rectangular section is the maximum stress B The shear stress variation across a rectangular section is parabolic C The shear deformations are small as compared to bending deformation D The shear centre is also known as centre of moment

The coefficient of restitution of a perfectly plastic impact is equal to:

A specimen is subjected to a stress which follows sinusoidal variation with respect to the time from minimum zero value to a maximum value \(+\sigma\):

1. Mean value of Stress = 0
2. Amplitude of Stress = \( \sigma / 2 \)
3. Nature of Stress = Repeated Stress
4. Nature of Stress = Fluctuating Stress

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A shaft is subjected to Bending Moment (\( M \)) and Torsional Moment (\( T \)), the equivalent torsional moment in the shaft is: