Engineering Mechanics Objective module 1 with solutions: A K GAIKAR

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1 Engineering Mechanics Objective module 1 with solutions: A K GAIKAR 1. What is the branch of engineering mechanics which refers to the study of stationary rigid body? A. Statics B. Kinetics C. Kinematics D. Dynamics 2. What is the branch of engineering mechanics which refers to the study of rigid body in motion under the action of forces? A. Statics B. Strenght of materials C. Kinematics D. Dynamics 3. What is the branch of engineering mechanics which refers to the study of rigid body in motion without reference to the force that causes the motion? A. Statics B. Kinetics C. Kinematics D. Dynamics 4. What refers to the force that holds part of the rigid body together? A. Natural force B. External force 1

2 C. Internal force D. Concentrated force 5. What refers to a pair of equal, opposite and parallel forces? A. Couple B. Moment C. Torque D. All of the above 6. What is a concurrent force system? A. All forces act at the same point. B. All forces have the same line of action. C. All forces are parallel with one another. D. All forces are in the same plane. 35. When will a three-force member be considered in equilibrium? A. When the sum of the two forces is equal to the third force. B. When they are concurrent or parallel. C. When they are coplanar. D. All of the above 7. A roller support has how many reactions? A. None B. 1 C. 2 D A link or cable support has how many reactions? A. None 2

3 B. 1 C. 2 D A build-in, fixed support has how many reactions and moment? A. 1 reaction and 1 moment B. 2 reactions and 1 moment C. 1 reaction and 2 moments D. 2 reactions and no moment 10. Which support has one moment? A. Frictionless guide B. Pin connection C. Fixed support D. Roller 11. What is the science that describes and predicts the effect on bodies at rest or in motion by forces acting on it? A. Engineering Mechanics B. Theory of Structures C. Mechanics of Materials D. Strength of Materials 12. What refers to a negligible body when compared to the distances involved regarding its motion? A. Particle B. Atomic substance C. Element D. Quarks 3

4 13. The resulting force of a distributed load is always acting at: A. the center of the beam subjected to the distributed load B. the centroid of the area of the loading curve C. the 1/3 point from the higher intensity side of the loading curve D. the 2/3 point from the higher intensity side of the loading curve 14. The resultant force of a distributed load is always equal to: A. twice the area under the loading curve B. half the area under the loading curve C. the area under the loading curve D. one-fourth the area under the loading curve 15.When a body has more supports than are necessary to maintain equilibrium, the body is said to be. A. in static equilibrium B. in dynamic equilibrium C. statically determine D. statically indeterminate 16. When does an equation be considered dimensionally homogeneous? A. When it is unitless B. When the dimensions of the various terms on the left side of the equation is not the same as the dimensions of the various terms on the right side. C. When the degree of the left side of the equation is the same as the right side. D. When the dimensions of various terms on the left side of the equation is the same as the dimensions of the various terms on the right side. 17. What refers to the branch of mathematics which deals with the dimensions of quantities? A. Unit analysis 4

5 B. Dimensional analysis C. System analysis D. Homogeneity analysis 18. What is a simple beam? A. A beam supported only at its ends. B. A beam supported with a fixed support at one end and non on the other end. C. A beam with more than two supports. D. A beam with only one support at the midspan. 19. What assumption is used in the analysis of uniform flexible cable? A. Cable is flexible. B. Cable is inextensible. C. The weight of the cable is very small when compared to the loads supported by the cable. D. All of the above 20. The sum of individual moments about a point caused by multiple concurrent forces is equal to the moment of the resultant force about the same point. This statement is known as. 21. Pappus proposition B. D Alembert s principle C. Varignon s theorem D. Newton s method 22. Two forces acting on a particle may be replaced by a single force called resultant which can be obtained by drawing diagonal of parallelogram, which has the sides equal to the given forces. This statement is known as. A. Pappus Propositions B. Principle of Transmissibility 5

6 C. Parallelogram Law D. Varignon s Theorem Solutions 1. Statics 2. Dynamics 3. Kinematics 4. Internal force 5. Couple 6. All forces act at the same point. 7. When they are concurrent or parallel Fixed support 12. Engineering 13. Particle 14. the centroid of the area of the loading curve 16. in static equilibrium 17. When the dimensions of various terms on the left side of the equation is the same as the dimensions of the various terms on the right side. 19. A beam supported only at its ends. Mechanics 15. the area under the loading curve 18. Dimensional analysis 20. All of the above 21. Varignon s theorem 22. Parallelogram Law