Mechanical Engineering Mcqs

In the equation of virtual work, following force is neglected_______________________?

(A) reaction of any smooth surface with which the body is in contact
(B) reaction of a rough surface of a body which rolls on it without slipping
(C) reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
(D) all of the above
(E) none of the above

Submitted By :Ali Uppal

A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span___________________?

(A) 2.5 cm
(B) 3.0 cm
(C) 4.0 cm
(D) 5.0 cm
(E) 2.0 cm

Submitted By :Ali Uppal

The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be_________________?

(A) r/2
(B) 2r/3
(C) r/A
(D) 3r/2
(E) 3r/A

Submitted By :Ali Uppal

From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate____________________?

(A) 0.5 cm
(B) 1.0 cm
(C) 1.5 cm
(D) 2.5 cm
(E) 0.25 cm

Submitted By :Ali Uppal

A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve ____________________?

(A) catenary
(B) parabola
(C) hyperbola
(D) elliptical
(E) circular arc

Submitted By :Ali Uppal

The units of moment of inertia of mass are ________________?

(A) kg m2
(B) m4
(C) kg/m2
(D) kg/m
(E) m2/kg

Submitted By :Ali Uppal

Center of gravity of a thin hollow cone lies on the axis at a height of ___________________?

(A) one-fourth of the total height above base
(B) one-third of the total height above base
(C) one-half of the total height above base
(D) three-eighth of the total height above the base
(E) none of the above

Submitted By :Ali Uppal

The center of percussion of the homogeneous rod of length L suspended at the top will be___________________?

(A) L/2
(B) L/3
(C) 3L/4
(D) 2L/3
(E) 3L/8

Submitted By :Ali Uppal

Center of gravity of a solid cone lies on the axis at the height _____________________?

(A) one-fourth of the total height above base
(B) one-third of the total height above base
(C) one-half of the total height above base
(D) three-eighth of the total height above the base
(E) none of the above

Submitted By :Ali Uppal

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________?

(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

Submitted By :Ali Uppal

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