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Mechanical Engineering :: Strength of Materials

  1. The maximum deflection of a fixed beam of length l carrying a central point load W is

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  3. The breaking stress is __________ the ultimate stress.

  4. A.
    equal to
    B.
    less than
    C.
    greater than

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  5. A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then

  6. A.
    bolt arid tube are under tension
    B.
    bolt and tube are under compression
    C.
    bolt is under compression and tube is under tension
    D.
    bolt is Under tension and tube is under compression

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  7. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The minimum normal stress will be

  8. A.
    400 MPa
    B.
    500 MPa
    C.
    900 MPa
    D.
    1400 MPa

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  9. The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σx and σy) acting at a body across two mutually perpendicular planes. The resultant stress is given by

  10. A.
    OC
    B.
    OP
    C.
    OQ
    D.
    PQ

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  11. The shear force diagram fora cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a

  12. A.
    horizontal straight line
    B.
    vertical straight line
    C.
    inclined line
    D.
    parabolic curve

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  13. When one plate overlaps the other and the two plates are riveted together with two rows of rivets, the joint is known as

  14. A.
    single riveted lap joint
    B.
    double riveted lap joint
    C.
    double riveted single cover butt joint
    D.
    double riveted double cover butt joint

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  15. When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

  16. A.
    equal to
    B.
    directly proportional to
    C.
    inversely proportional to
    D.
    independent of

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  17. The thermal or temperature stress is a function of

  18. A.
    increase in temperature
    B.
    modulus of elasticity
    C.
    coefficient of linear expansion
    D.
    all of these

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  19. In Mohr's circle, the centre of circle from Y-axis is taken as

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