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 __________________?

Related Mcqs:

1. A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is__________________?

   A. 0°
   B. 30°
   C. 45°
   D. 60°
   E. 90°.

2. 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 ).

3. The C.G. of a plane lamina will not be at its geometrical centre in the case of a __________________?

   A. right angled triangle
   B. equilateral triangle
   C. square
   D. circle
   E. rectangle

4. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?

   A. meet in a point
   B. be all parallel
   C. at least two of them must meet
   D. all the above are correct
   E. none of the above

5. The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is_______________?

   A. same
   B. double
   C. half
   D. four times
   E. one-fourth

6. If a part is constrained to move and heated, it will develop ____________________?

   A. principal stress
   B. tensile stress
   C. compressive stress
   D. shear stress
   E. no stress

7. The algebraic sum of moments of the forces forming couple about any point in their plane is__________________?

   A. equal to the moment of the couple
   B. constant
   C. both of above are correct
   D. both of above are wrong
   E. none of the above

8. A single force and a couple acting in the same plane upon a rigid body_________________?

   A. balance each other
   B. cannot balance each other
   C. produce moment of a couple
   D. are equivalent
   E. none of the above

9. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?

   A. same
   B. double
   C. half
   D. four times
   E. one fourth

10. A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?

    A. straight line
    B. parabola
    C. hyperbola
    D. elliptical
    E. part of a circle