Two coplanar couples having equal and opposite moments_________________?

Related Mcqs:

1. The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?

   A. 20 kg, – ve sense
   B. 20 kg, + ve sense
   C. 10 kg, + ve sense
   D. 10 kg, – ve sense
   E. 45 kg, + ve sense

2. Forces are called coplanar when all of them acting on body lie in __________________?

   A. one point
   B. one plane
   C. different planes
   D. perpendicular planes
   E. different points

3. Two non-collinear parallel equal forces acting in opposite direction__________________?

   A. balance each other
   B. constitute a moment
   C. constitute a couple
   D. constitute a moment of couple
   E. constitute a resultant couple

4. If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella___________________?

   A. more inclined when moving
   B. less inclined when moving
   C. more inclined when standing
   D. less inclined when standing
   E. none of the above

5. 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. forces
   B. independence of forces
   C. dependence of forces
   D. balance of force
   E. resolution of forces

6. Tangent of angle of friction is equal to__________________?

   A. kinetic friction
   B. limiting friction
   C. angle of repose
   D. coefficient of friction
   E. friction force

7. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one___________________?

   A. ellipse
   B. hyperbola
   C. parabola
   D. circle
   E. none of the above

8. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to___________________?

   A. 25
   B. 50
   C. 100
   D. 250
   E. 500

9. The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to _________________?

   A. Wtan(a + )
   B. Wtan(a-)
   C. Wcos(a + )
   D. Wsin(a + )
   E. W (sin a + cos ).

10. A framed structure is perfect if it contains members equal to_________________?

    A. 2n-3
    B. n-l
    C. ‘2n-l
    D. n – 2
    E. 3n-2.
    where n = number of joints in a frame