The C.G. of a solid hemisphere lies on the central radius 3r_______________?

A. At distance — from the plane base 3r
B. At distance — from the plane base 3r
C. At distance — from the plane base 3r
D. At distance — from the plane base or

The C.G. of a right circular solid cone of height h lies at the following distance from the base_____________?

A. H/2
B. J/3
C. H/6
D. H/4

Which of the following is the example of lever of first order________________?

A. Arm of MAN
B. Pair of scissors
C. Pair of clinical tongs
D. All of the above

In actual machines______________?

A. Mechanical advantage is greater than velocity ratio
B. Mechanical advantage is equal to velocity ratio
C. Mechanical advantage is less than velocity ratio
D. Mechanical advantage is unity

In ideal machines________________?

A. Mechanical advantage is greater than velocity ratio
B. Mechanical advantage is equal to velocity ratio
C. Mechanical advantage is less than velocity ratio
D. Mechanical advantage is unity

The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of__________________?

A. Friction
B. Limiting friction
C. Repose
D. Kinematic friction

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?

A. Same
B. Double
C. Half
D. Four times

The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?

A. Right angled triangle
B. Equilateral triangle
C. Square
D. Circle

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one________________?

A. Ellipse
B. Hyperbola
C. Parabola
D. Circle

The co-efficient of friction depends upon________________?

A. Nature of surfaces
B., area of contact
C. Shape of the surfaces
D. Ail of the above.