A. the tangent of the angle of friction is equal to coefficient of friction

B. the angle of repose is equal to angle of friction

C. the tangent of the angle of repose is equal to coefficient of friction

**D. the sine of the angle of repose is equal to coefficient to friction**

E. none of the above

# Engineering Mechanics

Engineering Mechanics

A. The C.G. of a circle is at its center

B. The C.G. of a triangle is at the intersection 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 distance of r/2 from the center**

E. The C-G. of an ellipse is at its center

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**

A. post friction

B. limiting friction

C. kinematic friction

D. frictional resistance

**E. dynamic friction**

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

**A. coefficient of friction**

B. angle of friction

C. angle of repose

D. sliding friction

E. friction resistance

**A. 2n-3**

B. n-l

C. ‘2n-l

D. n – 2

E. 3n-2.

where n = number of joints in a frame

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

**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