Elements Of Mechanical Engineering Quiz!

20 Questions | Total Attempts: 288

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Elements Of Mechanical Engineering Quiz!

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Questions and Answers
  • 1. 
    Forces are called concurrent when their lines of action meet in:
    • A. 

      One point

    • B. 

      Two points

    • C. 

      Plane

    • D. 

      Perpendicular planes

  • 2. 
    A force acting on a body may:
    • A. 

       introduce internal stresses

    • B. 

      Balance the other forces acting on it

    • C. 

      Retard its motion

    • D. 

      All the above

  • 3. 
    Effect of a force on a body depends upon:
    • A. 

      Magnitude

    • B. 

      Direction

    • C. 

      Position or line of action

    • D. 

      All of the above

  • 4. 
    If a number of forces act simultaneously on a particle, it is possible:
    • A. 

      Not a replace them by a single force

    • B. 

       to replace them by a single force

    • C. 

       to replace them by a single force through C.G.

    • D. 

      To replace them by a couple

  • 5. 
    The unit of work or energy in S.I. units.
    • A. 

      Newton

    • B. 

       pascal

    • C. 

      Kilogram meter

    • D. 

      Joule.

  • 6. 
    A force is completely defined when we specify:
    • A. 

      Magnitude

    • B. 

       direction

    • C. 

      Point of application

    • D. 

       all of the above  

  • 7. 
    Which is the correct statement about the law of polygon of forces?
    • A. 

      If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

    • B. 

       if any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium 

    • C. 

       if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

    • D. 

       if a polygon representing forces acting at a point is closed then forces are in equilibrium

  • 8. 
    Forces are called coplanar when all of them acting on body lie in:
    • A. 

       perpendicular planes

    • B. 

      One plane

    • C. 

      One point

    • D. 

      Similar planes

  • 9. 
    The unit of force in S.I. units is:
    • A. 

       kilogram

    • B. 

      Newton

    • C. 

      Watt

    • D. 

      Dyne

  • 10. 
    Lami's theorem is applicable for:
    • A. 

      3 forces in any plane

    • B. 

      3 forces at different plane

    • C. 

      3 forces which are coplanar

    • D. 

      3 forces which are concurrent and coplanar 

  • 11. 
    The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of:
    • A. 

      Resolution of forces

    • B. 

      Balance of force

    • C. 

      Dependence of forces

    • D. 

      Independence of forces

  • 12. 
    According to law of triangle of forces:
    • A. 

      If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

    • B. 

      Three forces acting at a point can be represented by a triangle, each side being proportional to force

    • C. 

      If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

    • D. 

       three forces acting at a point will be in equilibrium

  • 13. 
    If two forces of magnitude P and 2P act at an angle 60°, their resultant will be:
    • A. 

      2.65P

    • B. 

      3P

    • C. 

      2.59P

    • D. 

      2.44P

  • 14. 
    Which of the following is not a scalar quantity?
    • A. 

      Acceleration

    • B. 

      Density

    • C. 

      Time

    • D. 

      Mass

  • 15. 
    The weight of a body is due to:
    • A. 

      Gravitational force of attraction towards the center of the earth

    • B. 

      Force of attraction experienced by particles

    • C. 

      Gravitational pull exerted by the earth

    • D. 

      Forces experienced by body in atmosphere

  • 16. 
    The figure shows a particular position of 200 mm connecting rod AB and 80 mm long crank BC. At this position, the connecting rod of the engine experience a force of 3000 N on the crank pin at B. Find its horizontal component.
    • A. 

      2814.2 N

    • B. 

      1039.2 N

    • C. 

      507.1 N

    • D. 

      568 N

  • 17. 
    The figure shows a particular position of 200 mm connecting rod AB and 80 mm long crank BC. At this position, the connecting rod of the engine experience a force of 3000 N on the crank pin at B. Find its vertical component.
    • A. 

      2814.2 N

    • B. 

      1039.2 N

    • C. 

      507.1 N

    • D. 

      568 N

  • 18. 
    Determine the tension in cables AB necessary to support the 60-kg cylinder in Figure.
    • A. 

      420 N

    • B. 

      450 N

    • C. 

      457.6 N

    • D. 

      475.6 N

  • 19. 
    Determine the tension in cables BC necessary to support the 60-kg cylinder in Figure.
    • A. 

      420 N

    • B. 

      450 N

    • C. 

      476

    • D. 

      457 N

  • 20. 
    Determine the magnitude of the component force F in the given figure.
    • A. 

      245 lb

    • B. 

      273 lb

    • C. 

      500 lb

    • D. 

      Can't determined