When trying to turn a key into a lock, following is applied _____________________? - PakMcqs

Related Mcqs:

1. A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?

   A. remain horizontal B. slant up towards direction of pull C. slant down towards direction of pull D. unpredictable E. none of the above...

2. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction___________________?

   A. along the plane B. horizontally C. vertically D. at an angle equal to the angle of friction to the inclined plane E. unpredictable...

3. 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 E. to replace them by a couple and a force...

4. If a rigid body is in equilibrium under the action of three forces, then _____________________?

   A. these forces are equal B. the lines of action of these forces meet in a point C. the lines of action of these forces are parallel D. B. and C. above E. none of the above...

5. Center of gravity of a solid cone lies on the axis at the height _____________________?

   A. one-fourth of the total height above base B. one-third of the total height above base C. one-half of the total height above base D. three-eighth of the total height above the base E. none of the above...

6. The ratio of limiting friction and normal reaction is known as _____________________?

   A. coefficient of friction B. angle of friction C. angle of repose D. sliding friction E. friction resistance...

7. The C.G. of a right circular solid cone of height h lies at the following distance from the base______________?

   A. h/2 B. J/3 C. h/6 D. h/4 E. 3/i/5...

8. Which of the following is not the unit of energy_________________?

   A. kg m B. kcal C. wattr D. watt hours E. kg m x (m/sec)2...

9. Which of the following is a vector quantity___________________?

   A. energy B. mass C. momentum D. angle E. speed...

10. In the equation of virtual work, following force is neglected_______________________?

    A. reaction of any smooth surface with which the body is in contact B. reaction of a rough surface of a body which rolls on it without slipping C. reaction at a point or an axis, fixed in space, around which a body is con-strained to turn D. all of the above E. none of...