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

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

A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal_________________?

A. Density of metal can’t be determined
B. Metal is twice as dense as water
C. Metal will float in water
D. Metal is twice as dense as unknown fluid

Which of the following is not the unit of energy_________________?

A. Kg m
B. Kcal
C. Wattr
D. Watt hours

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

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