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MCQs

Total Questions : 1033 | Page 2 of 104 pages
Question 11. When trying to turn a key into a lock, following is applied
  1.     coplanar force
  2.     non-coplanar forces
  3.     moment
  4.     couple
 Discuss Question
Answer: Option D. ->  couple
Question 12. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of
  1.     friction
  2.     limiting friction
  3.     repose
  4.     kinematic friction
 Discuss Question
Answer: Option C. ->  repose
Question 13. Which is the correct statement about law of polygon of forces ?
  1.     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
  2.     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
  3.     if a polygon representing forces acting at a point is closed then forces are in equilibrium
  4.     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
 Discuss Question
Answer: Option D. ->  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
Question 14. In actual machines
  1.     mechanical advantage is greater than velocity ratio
  2.     mechanical advantage is equal to velocity ratio
  3.     mechanical advantage is less than velocity ratio
  4.     mechanical advantage is unity
 Discuss Question
Answer: Option C. ->  mechanical advantage is less than velocity ratio
Question 15. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
  1.     the floor is smooth, the wall is rough
  2.     the floor is rough, the wall is smooth
  3.     the floor and wall both are smooth surfaces
  4.     the floor and wall both are rough sur-faces
 Discuss Question
Answer: Option C. ->  the floor and wall both are smooth surfaces
Question 16. Forces are called coplanar when all of them acting on body lie in
  1.     one point
  2.     one plane
  3.     different planes
  4.     perpendicular planes
 Discuss Question
Answer: Option B. ->  one plane
Question 17. Which of the following is not the unit of distance ?
  1.     angstrom
  2.     light year
  3.     millimeter
  4.     milestone.
 Discuss Question
Answer: Option D. ->  milestone.
Question 18. From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. find the e.g. of the remainder from the center of circular plate
  1.     0.5 cm
  2.     1.0 cm
  3.     1.5 cm
  4.     2.5 cm
 Discuss Question
Answer: Option A. ->  0.5 cm
Question 19. Forces are called concurrent when their lines of action meet in
  1.     one point
  2.     two points
  3.     plane
  4.     perpendicular planes
 Discuss Question
Answer: Option A. ->  one point
Question 20. A framed structure is perfect if it contains members equal to (where n = number of joints in a frame)
  1.     2n-3
  2.     n-l
  3.     2n-l
  4.     n-2
 Discuss Question
Answer: Option A. ->  2n-3

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