B.TechSemester 42024-25Engineering Mechanics Strength MaterialBME402

Engineering Mechanics Strength Material (BME402) - AKTU Question Paper 2024-25

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 2024-25. 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:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Engineering Mechanics Strength Material (BME402) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 02 x 7 = 14

a
Define a free body diagram and its importance
b
What is the significance of the centroid in structural analysis?
c
Differentiate betwe en normal stress and shear stress
d
What are principal stresses?
e
Define Macaulay’s method in the context of beam deflection
f
State Euler’s formula for column buckling
g
Mention the difference between thin and thick cylinders

Section BAttempt any three of the following: 07 x 3 = 21

a
A uniform ladder 5m long weighs 180 N. it is placed against a wall making an angle of 60o with floor. The coefficient of f riction between the wall and l adder is 0.25 and between the floor and the ladder is 0.35. The ladder h as to support a mass 900N at its top. Calculate the horizontal force P to be ap plied to the ladder at the floor level to prevent slipping
b
State and prove Lami’s theorem
c
Derive Bending equation with assumptions
d
A solid circular shaft is sub jected to a bending moment of 3000 N-m and a torque of 10000 N-m. The shaft is made of 45C8 steel having ultimate t ensile stress of 700 MPa and a ultimate shear stress of 500 MPa. Assuming a fact or of safety as 6, determine the diameter of shaft
e
Find the expression for cripping load for a long column when o n e e n d o f t h e column is fixed and another end is hinged

Section CAttempt any one part of the following: 07 x 1 = 07

a
Determine magnitude and nature of forces in members of given truss
b
Draw the S.F. and B.M. diagrams of a simply supported beam a s shown in Fig
a
Drive Lames equation for thic k cylinder? Also write assumptions
b
For a closed coiled helical spr ing subjected to an axial loa d of 300 N having 12 coils of wire diameter of 16 mm, and made with coil diameter of 250 mm, find. (i)axial deflection. (ii)Strain energy stored, (iii) max. Torsi onal shear stress in the wire. (iv) Max shear stress. Use Whals correction factor take G=80 G N/ mm2
a
Determine the slope and deflection of simply supported beam of length l subjected a uniformly distribute d load w over the length of bea m by Macaulay’s method
b
A solid steel shaft has to transmit 100 kW at 160 RPM. Takin g allowable shear stress as 70 MPa, find th e s uitable diam eter of the s haft. The maximum torque transmitted in each revolution exceeds the mean by 20%
a
A hollow C.I column whose outside diameter is 200 mm has a t hickness of 20 m m . I t i s 4 . 5 m l o n g a n d i s f i x e d a t b o t h e n d s . C a l c u l a t e t h e safe load by Rankin’s critical loads . Take 550 N/mm, α=1/1600 in Rankin’s fo rmula and
b
Drive an expression for bending stresses of leaf spring of s pan length l, width b, thickness t, number of plates n, subjected to load w
a
A cast iron pipe of 400 mm inte rnal diameter and 100 mm thickness carries water under a pressure of 8 N/mm 2. Determine the maximum and minimum intensities of hoop stress across the section. Also sketch the radial press ure distribution and hoop stress distribution across the section
b
In a cylindrical shell of 0.6 m diameter and 0.9 m long is s ubjected to an internal p r e s s u r e 1 . 2 N / m m2. Thickness of the cylinder wall is 15 mm. Determine longitudinal stresses, circumfer ential stress and maximum shear stresses induced and change in diameter, length and volume. Take E=200 GPa and1/m=0.3

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — BME402

Questions that appeared in more than one session, found by comparing 3 years of Engineering Mechanics Strength Material papers (2023-24, 2024-25, 2025-26)

Draw the S.F. and B.M. diagrams of a simply supported beam a s shown in Fig