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.

If n = number of members andy = number of joints, then for a perfect frame, n =_________________?

A. J-2
B. 2j-l
C. 2/-3
D. 3/-2

A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to___________________?

A. 25
B. 50
C. 100
D. 250

A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_________________?

A. 38 m
B. 62.5 m
C. 96 m
D. 124 m

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 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 not the unit of energy_________________?

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

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

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

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