Strength of Materials Mcqs

MCQ: The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?

1. L/2
2. L/3
3. 3L/4
4. 2L/3
5. 3L/8

MCQ: The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be______________?

1. r/2
2. 2r/3
3. r/A
4. 3r/2
5. 3r/A

MCQ: If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be___________________?

1. maximum
2. minimum
3. zero
4. infinity
5. same as the force applied

MCQ: Angle oT friction is the___________________?

1. angle between normal reaction and the resultant of normal reaction and the limiting friction
2. ratio of limiting friction and normal reaction
3. the ratio of minimum friction force to the friction force acting when the body is just about to move
4. the ratio of minimum friction force to friction force acting when the body is in motion
5. ratio of static and dynamic friction

MCQ: Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?

1. along the plane
2. horizontally
3. vertically
4. at an angle equal to the angle of friction to the inclined plane
5. unpredictable

MCQ: Which one of the following statements is not correct_________________?

1. the tangent of the angle of friction is equal to coefficient of friction
2. the angle of repose is equal to angle of friction
3. the tangent of the angle of repose is equal to coefficient of friction
4. the sine of the angle of repose is equal to coefficient to friction
5. none of the above

MCQ: On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?

1. downwards at its upper end
2. upwards at its upper end
3. perpendicular to the wall at its upper end
4. zero at its upper end
5. none of the above

MCQ: Coefficient of friction is the__________________?

1. angle between normal reaction and the resultant of normal reaction and the limiting friction
2. ratio of limiting friction and normal reaction
3. the friction force acting when the body is just about to move
4. the friction force acting when the body is in motion
5. tangent of angle of repose

MCQ: A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to___________________?

1. W
2. W sin (a + $)
3. Wtan(a + <|))
4. Wan(a-)
5. Wtana

MCQ: If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella_________________?

1. more inclined when moving
2. less inclined when moving
3. more inclined when standing
4. less inclined when standing
5. none of the above