Bissoy.com
Doctors Medicines MCQs Q&A

Which of these are the assumptions made in the force analysis of simple trusses? (i) All members have same cross-sectional area (ii) The bending resistance of all the members is small in comparison with their axial force resistance (iii) All the external loads are applied directly or indirectly at the joints (iv) All joints are idealized to be frictionless hinges

Which of these are the assumptions made in the force analysis of simple trusses? (i) All members have same cross-sectional area (ii) The bending resistance of all the members is small in comparison with their axial force resistance (iii) All the external loads are applied directly or indirectly at the joints (iv) All joints are idealized to be frictionless hinges Correct Answer (ii), (iii) and (iv)

Explanation

The objective of truss analysis is to determine the reactions and member forces. The methods used for carrying out the analysis with the equations of equilibrium and by considering only parts of the structure through analyzing its free body diagram to solve the unknowns.

The assumptions made in the analysis of truss-

  • Truss members are connected together at their ends only.
  • Truss are connected together by frictionless pins.
  • The truss structure is loaded only at the joints.
  • The weights of the members may be neglected.
  • The bending resistance of all the members is small in comparison with their axial force resistance.

There are various methods to analyze a truss considering the above mentioned assumptions.

They are- Method of joints, Method of sections.

Related Questions

In the question below, a statement is given which is followed by three assumptions numbered I, II and III. An assumption is something that is supposed or taken for granted. You have to consider the following assumptions and decide which of the assumptions is implicit in the statement. Statement: After more than two weeks, all 12 boys and their coach, stuck in the flooded Tham Luang Cave have been rescued by the Thai navy seal team. The last three members of the 'Wild boar' football team and their coach were rescued today ending a three-day rescue attempt that had caught the world's attention. Assumptions: I. The ‘Wild Boars' soccer team and their coach got trapped when they set out to explore the vast cave complex after soccer practice when a rainy season downpour flooded the tunnels. II. Four more of the boys were carried on stretchers out of the labyrinthine Tham Luang cave on the Myanmar border at dusk on Monday, bringing to eight the number brought out after two rescue pushes on successive days. III. The rescuers have been learning from experience and were two hours faster in bringing the second batch of survivors out on Monday. 
Given is a statement followed by two assumptions numbered I and II. Consider the statement and the following assumptions and decide which of the assumptions is/are implicit in the statement. Statement: Global warming, species extinction and deforestation are posing a threat to the environment. Assumptions: I. The more we exploit and degrade our environment, the more ecological imbalance we create, ultimately putting the very existence of human life at risk. II. Every species is dependent on every other species for survival, directly or indirectly. Human beings are the ones who depend on maximum number of species for not only our survival but also for our development needs.
Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.
Which of the following statements is true? A. Impact loads are equal to the sum of the magnitude of the loads actually caused and the magnitude of the loads had they been dead loads. B. Impact loads are equal to the difference between the above-mentioned entities.
Which of the following statements is most relevant in the context of Job Analysis? Choose the correct answer from the code given below. (i) Job Analysis helps in identifying the right person for the right job. (ii) A person cannot judge the job from the point of view of its suitability. (iii) Job analysis helps in job satisfaction and job efficiency. (iv) Through Job Analysis an employer cannot evaluate the prospective employee to judge his fitness or otherwise for the job. (v) Job Analysis helps in planning appropriate training programs. (vi) Job Analysis defines client needs in specific terms. (vii) Job Analysis assists in knowing the personnel specifications for various jobs.
In question below is given a statement followed by two assumptions numbered I , II and III. An assumption is something supposed or taken for granted. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement. Statement: “Wanted a three bedroom flat in the court area for immediate possession”- an advertisement Assumptions: I. Flats are available in court area. II. Some people will respond to the advertisement. III. It is a practice to give such an advertisement.
In each question below is given a statement followed by two assumptions numbered I and II. An assumption is something supposed or taken for granted. You have to consider the following assumption and decide which of the assumption is implicit in the statement. Statement: Slamming the BJP over complaints of malfunctioning EVMs and VVPAT machines, the Shiv Sena on Wednesday said, "The present Election Commission and its machinery have become like slaves of the government." Assumptions: I. India can be called the largest democracy in the world. "Those in power at present have made democracy their mistress with their autocratic mindset". II. India can no longer be called the largest democracy in the world, "Those in power at present have made democracy their mistress with their autocratic mindset".
Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?
As per IS 800 : 2007, what is the maximum value of effective slenderness ratio of a beam / strut/ tension member for the following cases? Case 1: Members carrying compressive loads resulting from dead loads and imposed loads. Case 2: Members always under tension. Case 3: Members subjected to compressive forces resulting from a combination of wind/earthquake actions.
The elastic potential energy of a body is
1. Work done by the external force against the deforming force.
2. Work done against the external force by the deforming force.
3. The sum of work done by the external force and the deforming force.
Which one option is true?