Strength of materials
Previous year question paper with solutions for Strength of materials Dec-2018
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Question paper 1
SECTION-A
Q1. a) Fill in the blanks.
i. A body is subjected to external force the restoring force per unit area is known as ________
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Read moreii. Energy stored in a body within elastic limits is known as _________.
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Read moreiii. If load at the free end of the cantilever is increased, failure will be occure at __________
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Read moreiv. Maximum bending moment occurs in a beam where the shear forces is__________.
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Read morev. Euler’s buckling theory is applicable for ________columns.
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Read morevi. The unit of torque is __________.
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Read morevii. Twisting couple in a shaft induces _________.
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Read moreviii. Temperature stress will arise only if the ends of a bar _________.
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Read moreix. Rivets are generally made of a material which is________.
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Read morex. The damping capacity of material is its capacity to __________.
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Read moreb) State True or False.
xi. Point of contraflexure is a point where the bending moment changes its sign.
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xii. The hogging moment is a negative bending moment.
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xiii. I section is the strongest section in bending for same area of cross-section.
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xiv. Transverse loads means load applied along the axis of a beam
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xv. Stiffness is decreased if two helical springs are connected in parallel.
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SECTION-B
Q2. Attempt any six questions.
a. Explain the terms ductility, brittleness, and toughness of material.
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Read moreb. Define Helix angle, Solid length of spring and Spring index
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Read morec. What do you understand by bending moment and point of contraflexure
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Read mored. Write torsion equation and name each term.
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Read moree. Find the minimum diameter of a steel wire which is used to raise a load of 5000 N if the stress in the wire is not to exceed 95 N/mm2
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Read moref. What are the temperature stresses and strains?
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Read moreg. What is meant by resilience and proof resilience?
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Read moreh. Define crippling load, slenderness ratio, and equivalent length of a column
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Read moreSECTION-C
Q3. Attempt any two questions.
i. What will be percentage saving in material if solid shaft of 100 mm is replaced by hollow shaft to transmit same power at the same maximum allowable stress? The ratio of internal to external diameter is 0.60.
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Read moreii. A Beam 10m span simply supported at its ends carries a load of 20KN/m over the left half of the span and point load of 30KN at the mid span. Draw the S.F &B.M diagrams for the given beam and find the position and magnitude of maximum bending moment.
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Read moreiii. A T-section is of 100 mm x100 mm x 20 mm. Determine Ixx, Iyy both passing through the centroid and the least value of section modulus about XX.
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Read moreiv. A mild steel tube, 25 mm external diameter, 2.5 mm thick is 3m long and is used as strut. Determine the safe compressive load when this strut is used with the following end condition
a. Both ends are hinged.
b. Both ends are fixed.
c. One end is fixed and the other end is free. Take factor of safety = 3 and E =2 ×105 N/mm2 .
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