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A steel rod of cross-sectional area 200 mm² is subjected to a force of 1000 N parallel to its cross section causing shear. Calculate the shear stress developed in the rod.

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Free Assistant Engineer KERALA WATER AUTHORITY Practice Questions

Kerala Public Service CommissionRecruitment for the post of Assistant Engineer in Kerala Water Authority. The role involves engineering responsibilities in civil, mechanical, or chemical domains.Direct RecruitmentAge Limit: 18-36 years

Try 15 free syllabus-aligned practice questions for the Assistant Engineer KERALA WATER AUTHORITY exam. Each question includes instant feedback so you can learn as you go. No sign-up required.

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Q1. A steel rod of cross-sectional area 200 mm² is subjected to a force of 1000 N parallel to its cross section causing shear. Calculate the shear stress developed in the rod.

  1. 5 MPa
  2. 2 MPa
  3. 0.2 MPa
  4. 20 MPa

Q2. In a tensile test, a cylindrical specimen with diameter 20 mm is subjected to an axial load of 15 kN. Calculate the normal stress developed and identify whether the stress is tensile or compressive.

  1. 47.7 MPa, tensile
  2. 47.7 MPa, compressive
  3. 95.5 MPa, tensile
  4. 95.5 MPa, compressive

Q3. A cylindrical rod is subjected to axial loading causing both stress and strain. If two rods made of different materials have the same applied stress but different strains, what can be inferred about the materials?

  1. Both materials have the same Young's modulus.
  2. The material with higher strain has a lower Young's modulus.
  3. The material with higher strain has a higher Young's modulus.
  4. Young's modulus cannot be determined from stress and strain.

Q4. Which of the following best defines shear stress in a material?

  1. Stress acting perpendicular to the surface area
  2. Stress acting parallel to the surface area
  3. Stress causing volumetric change in the material
  4. Stress that results from temperature variations

Q5. Consider a metal rod subjected to a tensile force causing elongation. Which of the following best describes the relationship between the applied force and the resulting stress?

  1. Stress is equal to the applied force divided by the original cross-sectional area of the rod.
  2. Stress is equal to the applied force multiplied by the elongation of the rod.
  3. Stress is the ratio of elongation to the applied force.
  4. Stress is independent of the applied force and depends only on the material.

Q6. A steel rod of original length 2 m is stretched to 2.002 m under tensile load. Calculate the strain developed in the rod.

  1. 0.001
  2. 0.0001
  3. 0.01
  4. 0.1

Q7. Consider two materials subjected to the same tensile load. Material X has a strain of 0.002, and Material Y has a strain of 0.004. Which statement is true regarding their deformation?

  1. Material X deforms twice as much as Material Y
  2. Material Y deforms twice as much as Material X
  3. Both materials deform equally
  4. Strain cannot be used to compare deformation

Q8. Which of the following best explains why strain is considered a dimensionless quantity?

  1. Because it is measured in meters
  2. Because it is a ratio of two lengths with the same unit
  3. Because it depends on the applied force
  4. Because it is measured in Newtons per square meter

Q9. Consider a rectangular block subjected to a force parallel to one of its faces causing deformation. What type of strain primarily develops in the block?

  1. Volumetric strain
  2. Axial strain
  3. Shear strain
  4. Thermal strain

Q10. What is the correct definition of strain in the context of material deformation?

  1. Force applied per unit area of a material
  2. Change in length divided by the original length of the material
  3. Energy stored per unit volume due to deformation
  4. The maximum load a material can withstand before failure

Q11. Compare normal stress and shear stress in terms of their directions relative to the cross-sectional area of a member.

  1. Normal stress acts tangentially; shear stress acts perpendicular
  2. Both act perpendicular to the cross-sectional area
  3. Normal stress acts perpendicular; shear stress acts tangentially
  4. Both act tangentially to the cross-sectional area

Q12. A steel rod with a cross-sectional area of 50 mm² is subjected to an axial tensile force of 10 kN. Calculate the normal stress developed in the rod.

  1. 200 MPa
  2. 500 MPa
  3. 150 MPa
  4. 100 MPa

Q13. Which of the following scenarios best illustrates the concept of normal stress?

  1. A beam subjected to a twisting moment
  2. A column carrying an axial compressive load
  3. A surface experiencing frictional force
  4. A shaft under torsional shear

Q14. What is the fundamental difference between stress and strain in the context of material deformation?

  1. Stress is a measure of deformation, while strain is the internal force per unit area.
  2. Stress is the internal force per unit area, while strain is the measure of deformation or change in shape.
  3. Stress and strain both measure the same physical quantity but in different units.
  4. Stress is only applicable to solids, while strain applies to fluids.

Q15. A steel wire of length 2 m and diameter 2 mm is stretched by a force of 100 N. Calculate the tensile stress developed in the wire. (Use π = 3.14)

  1. 31.8 MPa
  2. 15.9 MPa
  3. 63.7 MPa
  4. 7.95 MPa
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