Freshers India

Engineering - Mechanical Engineering

You Are Here :: Home > Mechanical Engineering > Mechanical Engineering Basics -General Questions

31.

Limiting force of friction is the

A.	tangent of angle between normal-reac-tion and the resultant of normal reac-tion and limiting friction	B.	ratio of limiting friction and normal reaction
C.	the friction force acting when the body is just about to move	D.	the friction force acting when the body is in motion

32.

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be

A.	towards the wall at its upper end	B.	away from the wall at its upper end
C.	upwards at its upper end	D.	downwards at its upper end

33.

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

A.	downwards at its upper end	B.	upwards at its upper end
C.	perpendicular to the wall at its upper end	D.	zero at its upper end

34.

Pick up the incorrect statement from the following :

A.	The C.G. of a circle is at its centre	B.	The C.G. of a triangle is at the inter¬section of its medians
C.	The C.G. of a rectangle is at the inter-section of its diagonals	D.	The C.G. of a semicircle is at a dis¬tance of r/2 from the centre

35.

Pick up wrong statement about friction force for dry surfaces. Friction force is

A.	proportional to normal load between the surfaces	B.	dependent on the materials of contact surface
C.	proportional to velocity of sliding	D.	independent of the area of contact sur-faces

36.

Tangent of angle of friction is equal to

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

« prev

Catch Us on