B.TechSemester 42025-26Engineering Mechanics Strength MaterialBME402
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Engineering Mechanics Strength Material (BME402) - AKTU Question Paper 2025-26

B.Tech · Semester 4 · Free PDF Download

This is the official AKTU Engineering Mechanics Strength Material Previous Year Question Paper for B.Tech Semester 4, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 4
Session:2025-26
University:AKTU / UPTU

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Questions Asked in 2025-26

Engineering Mechanics Strength Material (BME402) — extracted question text · 70 marks · 3 Hours

Section AAttempt all questions in brief. 02 x 7 = 14
  • a
    200 N block on rough surface (μ = 0.25). Find maximum friction
  • b
    What is limiting friction?
  • c
    Find centroid of a semicircle (r = 10 cm)
  • d
    A rod elongates 1 mm under 50 kN. Find strain (L = 1 m)
  • e
    What is torsional rigidity?
  • f
    A beam carries moment 1 kNm. Find stress (Z = 5×10⁻⁵ m³)
  • g
    Column length = 2 m, k = 0.5. Find effective length
Section BAttempt any three of the following: 07 x 3 = 21
  • a
    A 600 N block rests on a rough plane inclined at 25°. A force is applied parallel to plane. Find the force required to just move it upward and downward (μ = 0.3)
  • b
    A bar is subjected to: Tensile stress = 120 MPa, Shear stress = 60 MPa Find principal stresses and max shear stress
  • c
    A cantilever beam (length 3 m) carries: UDL = 5 kN/m, Point load = 10 kN at free end. Find slope and deflection at free end
  • d
    A helical spring: Wire dia = 10 mm, Mean dia = 80 mm, Load = 500 N Find deflection and shear stress
  • e
    A thin cylinder: Diameter = 1 m , Thickness = 10 mm, Pressure = 2 MPa Find: Hoop stress, Longitudinal stress and Volumetric strain
Section CAttempt any one part of the following: 07 x 1 = 07
  • a
    A ladder 5 m long rests against a wall at 60°, μ (ground) = 0.4, μ (wall) = 0.3. Find the maximum height a person can climb before slipping
  • b
    A beam (span 8 m) carries: UDL = 10 kN/m, Point load = 20 kN at mid Draw SFD & BMD and find max bending moment. (SEM. IV) THEORY EXAMINATION 2025-26 ENGINEERING MECHANICS & STRENGTH MATERIAL
  • a
    Find centroid of a composite area: rectangle (100×50 mm) with a semicircle cut-out
  • b
    Construct Mohr’s Circle for: σx = 80 MPa, σy = 20 MPa, τxy = 40 MPa. Find principal stresses and angle
  • a
    A laminated steel spring 1 m long is to support central load of 5·8 kN. If the
    maximum deflection of spring is not to exceed 45 mm and maximum stress should
not exceed
300 MN/m2, calculate:
(i) The thickness of the leaves;
(ii) Their number if each plate is to be 80 mm wide.
Take: E = 200 GN/m2
  • b
    A hollow shaft has internal diameter 60 mm and external diameter 100 mm. Find torque capacity compared to solid shaft of same area. (SEM. IV) THEORY EXAMINATION 2025-26 ENGINEERING MECHANICS & STRENGTH MATERIAL
  • a
    A closely coiled helical spring is to carry a load of 500 N. Its mean coil diameter is to be 10 times that of the wire diameter. Calculate these diameters if the maximum shear stress in the material of the spring is to be 80 MN/m2
  • b
    Derive the expression for the critical buckling for a column having one end fixed and the other end free
  • a
    A built up cylindrical shell of 300 mm diameter, 3 m long and 6 mm thick is subjected to an internal pressure of 2 MN/m 2. Calculate the change in length and diameter of the cylinder under that pressure if the efficiencies of the longitudinal and circumferential joints are 80% and 50% respectively. E = 200 GN/m 2; µ =
  • b
    A rotating cylinder: Radius = 0.5 m, Speed = 3000 rpm. Find induced stresses

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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