DME301 Applied Mechanics DME Question Paper : tmu.ac.in
University : Teerthanker Mahaveer University
College : Teerthanker Mahaveer Polytechnic
Degree : DME (Diploma of Mechanical Engineering)
Subject : DME301 Applied Mechanics
Semester : I
Document Type : Question Paper
Website : tmu.ac.in
Download Previous/ Old Question Papers : https://www.pdfquestion.in/uploads/tmu.ac.in/5731-oldquestionpolytechnic201011.pdf
Applied Mechanics :
POLYTECHNIC (LATERAL) I SEMESTER EXAMINATION 2010-11
Course Code : DME301
Paper ID: 0551107
Related : Teerthanker Mahaveer University DME101 Basic Mechanical Engineering DME Question Paper : www.pdfquestion.in/5729.html
Time : 3 Hours
Max. Marks: 75
Note : Attempt six questions in all. Q. No. 1 is compulsory.
1. Answer any five of the following (limit your answer in 50 words). (3×5=15)
a) Differentiate between mass and weight.
b) Define the term ‘force’.
c) What is lever- Give a few of its applications.
d) What do you mean by parallel ‘force’-
e) Explain the term ‘friction and limiting friction’.
f) What are the laws of ‘friction’-
g) Briefly explain about ‘stress and strain’.
h) List the methods of analysis in trusses.
2. State the law of parallelogram of forces and find the magnitude and direction of the resultant R of four concurrent forces acting as shown in figure : (6)
3. Prove that co-efficient of friction is equal to the tangent of angle of friction in the limiting equilibrium. (12)
4. Draw a typical stress-strain curve for mild steel and explain the salient points on it. (12)
5. A circular rod of diameter 16mm and 500mm long is subjected to a tensile force 40kN. The modulus of elasticity for steel may be taken as 200kN/nm2. Find stress, strain and elongation of the bar due to applied load. (12)
6. With sketch, explain the following types of supports : (4×3=12)
a) Simple b) Hinged c) Fixed
7. Explain the assumptions made in the analysis of pin jointed trusses. (12)
8. The lever of a safety valve weight 3N and its C.G. lies at a distance of 80mm from the center of the valve which is at 70 mm from the fulcrum. If the diameter and weight of the valve are respectively 60mm and 5N, find the minimum weight that will be hung to end of 750mm long lever to conserve steam in the boiler at a pressure of 0.8MPa. (as shown as given figure) (12)
Diploma in Engineering III (Third) Semester Examination 2011-12 :
Course Code : DME301
Paper ID : 0753119
Strength of Materials :
Time : 3 Hours
Max. Marks : 60
Max Marks : 75
Note : Attempt six questions in all. Q. No. 1 is compulsory.
1. Answer any five of the following (limit your answer in 50 words). (3×5=15)
a) State the direction of a support reaction in case of
i) Simply supported end.
ii) Hinged end.
b) How many points of contraflexure will have for simply supported beam overhanging at one end only?
c) State the basis difference between “Centroid” & “Centre of gravity”?
d) Define Radius of Gyration.
e) What is the ‘middle third rule’?
f) What will be the value and direction of deflection at the free end of a Cantilever of length ‘L’ carrying a uniformly distributed load of intensity ‘w’ per unit run through out the whole length?
g) Define ‘Strut’ and ‘Column’ elaborating the differences.
h) For a circular shaft, where maximum shear stress will be? What will be the shear stress at the centre?
2. A cantilever of length 5 m carries a uniformly distributed load of 2 kN/m length over the whole length and a point load of 4 kN at the free end. Draw S.F. and B.M. diagrams for the cantilever beam. (9)
3. Find the moment of inertia of a solid circular section about an axis passing through the centre and perpendicular to the plane of the paper. (9)
4. Stating Assumptions. Derive the Bending Equation using standard nomenclature. (9)
5. A cylindrical steel chimney of 45 meters height and 2 m external diameter is exposed to a horizontal wind pressure whose intensity varies as the square root of the height above the ground. At a height of 25 m, the intensity of wind pressure on a flat surface is 2.5 kN/m2, and co-efficient of wind resistance is 0.62. Calculate the bending moment at the foot of the chimney. (9)
6. Derive the equation for maximum deflection for a Simply supported beam of span ‘l’ carrying a point load at the mid span. (9)
7. Calculate the safe compressive load on a hollow cast iron column, one end rigidly fixed and the other end hinged of 150 mm external diameter, 100 mm internal diameter and 10 m length. Use Euler’s formula with a factor of safety of 5 and E=95 GN/m2. (9)
8. A short column of 20 cm external diameter and 15 cm internal diameter, when subjected to a load, the stress measurements indicate that the stress varies from 150 MN/m2 compressive at one end to 25 MN/m2 tensile on the other end. Estimate the load and distance of the line of action from the axis of the column. (9)