EME101 Engineering Mechanics B.Tech Question Paper : tmu.ac.in
University : Teerthanker Mahaveer University
College : Teerthanker Mahaveer College of Engineering
Degree : B.Tech
Subject :EME101 Engineering Mechanics
Semester : I
Document Type : Question Paper
Website : tmu.ac.in
Download Previous/ Old Question Papers :https://www.pdfquestion.in/uploads/tmu.ac.in/5767-oldquestionbtech201011.pdf
Engineering Mechanics :
B.Tech I SEMESTER EXAMINATION 2010-11
Course Code : EME101
Paper ID: 0211101
Related : Teerthanker Mahaveer Medical College & Research Centre EEC101 Basic Electronics Engineering B.Tech Question Paper : www.pdfquestion.in/5768.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) Comment on the statement that lines of action of any two components of a force intersect on the line of action of the force.
b) Friction is a necessary evil. Comment the validity of this statement.
c) Define shear force and bending moment.
d) What is a framed structure- List its application.
e) Define and explain Longitudinal strain, Lateral strain and Poisson’s ratio.
f) What are principal planes and principal stresses-
g) Define radius of gyration. How is it related to moment of inertia-
h) Define polar modulus. How is it related to the strength of the shaft-
2.a) What is a force polygon- How a force polygon is drawn to determine the magnitude of the resultant of a concurrent force system. (6)
b) A train weighing 3500kN has a frictional resistance of 5N/kN. What average pull will be required if it is to attain a speed of 72 km/h from rest in 5 minutes on the level?
3.a) Describe how you would proceed to draw shear force and bending moment in case of a concentrated load being applied at the mid span of a simply supported beam. (6)
b) Below Fig. 1.0 shows the sear force diagram of a beam ABCD. Find the position of the supports and the magnitude of reactions. (6)
4. Determine the forces in all the members of the truss loaded and supported as shown in Fig 2.0 (12)
5.a) Sketch stress strain diagram for ductile material and explain its salient features. How does stress strain curve for brittle materials differ from this curve- (12)
b) A steel tie rod 50 mm in diameter and 2.5m long is subjected to a pull of 100kN calculate the percentage change in extension produced under the same pull by boring the rod centrally for 1.2m length, the bore being 25mm in diameter. For steel modulus of elasticity is 2.5x105N/mm2. (6)
6.a) x and y are the principal stresses in a strained material. Prove that the resultant stress on the plane carrying maximum shear stress is given by
b) A bar of cross section 800 mm2 is acted upon by axial tensile forces of 50kN applied at each end of the bar. Determine normal and shear stresses on a plane inclined at 30° to the direction of loading.
7. a) Define section modulus. How it is related to moment of Inertia? Set up relations for the section modulus of the following sections- (6)
i) Circular section
ii) Hollow circular section
b) The moment of inertia of a beam section 50cm deep is 69490 cm4. Find the longest span over which a beam of this section, when simply supported, could carry a uniformly distributed load of 50kN per meter run. The maximum flange stress in the material is not to exceed 110N/mm2 (6)
8. a) Draw shear stress distribution for shafts of solid and hollow circular cross section. (6)
b) A hollow shaft is to transmit a uniform torque of 30kNm. The total angular twist in 2.5m length of the shaft is not to exceed 2 degree and the allowable shearing stress is 85MPa. Determine the external and internal diameter of the shaft. Take modulus of rigidity of the shaft material as 80GPa.
B.Tech I (First) Semester Examination 2014-15 :
1. Answer any five of the following (limit your answer to 50 words). (4×5=20)
a) If the square of the resultant of two equal forces is equal to three times of their product, find the angle between the forces.
b) Define and explain coplanar and non-coplanar force system.
c) Explain the difference between coefficient of friction and angle of friction.
d) What do you mean by the point of contraflexure? Is the point of contraflexure and point of inflexion different?
e) What are the assumptions made in the analysis of a simple truss?