## Two coplanar couples having equal and opposite moments_________________?

Two coplanar couples having equal and opposite moments_________________?

A. balance each other
B. produce a couple and an unbalanced force
C. are equivalent
D. produce a moment of couple
E. can not balance each other

## Frictional force encountered after commencement of motion is called ___________________?

Frictional force encountered after commencement of motion is called ___________________?

A. post friction
B. limiting friction
C. kinematic friction
D. frictional resistance
E. dynamic friction

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

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
E. none of the above

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

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

## A framed structure is perfect if it contains members equal to_________________?

A framed structure is perfect if it contains members equal to_________________?

A. 2n-3
B. n-l
C. ‘2n-l
D. n – 2
E. 3n-2.
where n = number of joints in a frame

## In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than____________________?

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than____________________?

A. two members with unknown forces of the frame
B. three members with unknown forces of the frame
C. four members with unknown forces of the frame
D. three members with known forces of the frame
E. four members with two known forces

## The center of gravity of a triangle lies at the point of __________________?

The center of gravity of a triangle lies at the point of __________________?

A. concurrence of the medians
B. intersection of its altitudes
C. intersection of bisector of angles
D. intersection of diagonals
E. all of the above

A. compression or tension
B. buckling or shear
C. shear or tension
D. all of the above
E. bending

## Angle of friction is the_______________________?

Angle of friction is the_______________________?

A. angle between normal reaction and the resultant of normal reaction and the limiting friction
B. ratio of limiting friction and normal reaction
C. the ratio of minimum friction force to the friction force acting when the body is just about to move
D. the ratio of minimum friction force to friction force acting when the body is in motion
E. ratio of static and dynamic friction

## If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________?

If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________?

A. maximum
B. minimum
C. zero
D. infinity
E. same as the force applied