Strength of Materials
JKSSB Junior Engineer (Mechanical) · Engineering Mechanics and Strength of Materials · 57 practice questions with answers and explanations: 15 Easy, 41 Medium, 1 Hard.
Sample questions
Sample Easy question 1
The bending moment diagram for a simply supported beam with a central point load is a:
- triangle
- parabola
- circle
- rectangle
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Answer: A. The moment rises linearly to a peak at midspan.
Sample Easy question 2
For a simply supported beam carrying a uniformly distributed load, the shear force at midspan is:
- equal to the total load
- maximum
- zero
- equal to the reaction
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Answer: C. By symmetry, the shear changes sign at the centre.
Sample Easy question 3
Euler's column formula is valid for:
- long (slender) columns
- short columns only
- all columns
- very short stocky columns
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Answer: A. Euler's formula applies when the slenderness ratio is large.
Sample Medium question 4
Proof resilience is:
- Stress at the yield point
- The maximum strain energy stored at the elastic limit
- Energy needed to break the specimen
- Energy lost as heat
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Answer: B. Modulus of resilience is proof resilience per unit volume.
Sample Medium question 5
Toughness of a material is represented by:
- The slope of the elastic part
- The Poisson's ratio
- The total area under the stress–strain curve
- The yield stress
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Answer: C. It measures energy absorbed up to fracture.
Sample Medium question 6
In a thin cylindrical shell of internal pressure p, diameter d and thickness t, the hoop stress is:
- pd / t
- pd / 2t
- pd / 4t
- 2pd / t
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Answer: B. The longitudinal stress is half of the hoop stress, pd/4t.
Sample Hard question 7
The relation between Young's modulus E, bulk modulus K and Poisson's ratio ν is:
- E = 3K(1 − 2ν)
- E = K / (1 − 2ν)
- E = K(1 + 2ν)
- E = 2K(1 + ν)
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Answer: A. As ν approaches 0.5, K becomes very large, which describes an almost incompressible material.