Mechanical Engineering Mcqs

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
(E) 2/ -4

Submitted By :Ali Uppal

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
(E) 500

Submitted By :Ali Uppal

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
(E) 240 m

Submitted By :Ali Uppal

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
(E) none of the above

Submitted By :Ali Uppal

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
(E) at distance — from the plane base

Submitted By :Ali Uppal

Which of the following is not the unit of energy_________________?

(A) kg m
(B) kcal
(C) wattr
(D) watt hours
(E) kg m x (m/sec)2

Submitted By :Ali Uppal

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
(E) none of the above

Submitted By :Ali Uppal

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
(E) 3/i/5

Submitted By :Ali Uppal

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
(E) rectangle

Submitted By :Ali Uppal

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
(E) one fourth

Submitted By :Ali Uppal

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