Strength of Materials Questions

• A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.
• A thin cylindrical shell of diameter (d), length (l) and thickness (t)is subjected to an internal pressure (p). The hoop stress in the shell is
• For biaxial stress, the planes of maximum shear are at right angles to each other and are inclined at 45° to the principal planes.
• When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is
• In the above question, the ratio of stiffness of spring 'B' to spring 'A' will be
• In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.
• A pressure vessel is said to be a thick shell, when
• The maximum bending moment of a simply supported beam of span l and carrying a point load W at the centre of beam, is
• Within elastic limit, shear stress is __________ shear strain.
• The planes, which carry no shear stress, are known as principal planes.
• In the below figure, the plastic range occurs
• The stiffness of a closely-coiled helical spring is __________ proportional to number of turns.
• The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
• A beam of triangular section is placed with its base horizontal. The maximum shear stress occurs at
• The shear stress at the centre of a circular shaft under torsion is
• At the neutral axis of a beam, the shear stress is
• The product of Young's modulus (E) and moment of inertia (I) is known as
• The actual neutral axis of a reinforced cement concrete beam is based on the principle that the moment of areas of compression and tension zones at the neutral axis are equal.
• A column of length (l) with both ends fixed may be considered as equivalent to a column of length __________ with one end fixed and the other end free.
• If there is a fall in the temperature of a composite body, then a member having greater coefficient of linear expansion will be subjected to compressive stress.