Engineering Mechanics MCQ with Answers

Engineering Mechanics MCQ with Answers

46) 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

Answer is:

20 kg, - ve sense

47) Angle of friction is the

Answer is:

angle between normal reaction and the resultant of normal reaction and the limiting friction

48) The coefficient of friction depends on

Answer is:

nature of surface

49) Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction

Answer is:

at an angle equal to the angle of friction to the inclined plane

50) The ratio of limiting friction and normal reaction is known as

Answer is:

coefficient of friction

Explanation:

The coefficient of friction is defined as the ratio of the limiting friction (F) to the normal reaction (R_N) between the two bodies.

The ratio of limiting friction and normal reaction is known as

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