The shape of the bending moment diagram over the length of a beam, carrying a un

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Question
The shape of the bending moment diagram over the length of a beam, carrying a uniformly distributed load is always
Options
A. linear
B. parabolic
C. cubical
D. circular.

Correct Answer

parabolic

Strength of Materials problems

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1. The shear stress at any section of a shaft is maximum
Options
A. at the centre of the section
B. at a distance r/2 from the centre
C. at the top of the surface
D. at a distance 3/4 r from the centre
E. none of these.

2. A closely coiled helical spring of radius R, contains n turns and is subjected to an axial load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the stress developed in the helical spring is
Options
A.
B.
C.
D.

3. A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10, 000 kg, the corresponding maximum shearing stress being 30 kg/cm². The depth of the beam is
Options
A. 15 cm
B. 20 cm
C. 25 cm
D. 30 cm.

4. The radius of gyration of a rectangular section is not proportional to
Options
A. square root of the moment of inertia
B. square root of the inverse of the area
C. square root of the moment of inertia divided by area of the section
D. none of these.

6. If the rivets in adjacent rows are staggered and outermost row has only one rivet, the arrangement of the rivets, is called
Options
A. chain riveting
B. zig-zag riveting
C. diamond riveting
D. none of these.

8. The range within which a load can be applied on a rectangular column, to avoid any tensile stress, is
Options
A. one-half of the base
B. one-fifth of the base
C. one-fourth of the base
D. one-fifth of the base
E. one sixth of the base on either side of centroid.

9. For a simply supported beam of length L, the bending moment M is described as M = a (x - x³/L²), 0 ? x < L; where a is a constant. The shear force will be zero at
Options
A. the supports
B. x = L/2
C. x = L/3
D. x = L/3

10. The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, is
Options
A. one-half of the radius
B. one-third of the radius
C. one-quarter of the radius
D. one-fifth of the radius
E. one-sixth of the radius.

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