Civil Engineering MCQs

Page No. 209

A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if______________?


a the floor is smooth, the wall is rough

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bthe floor is rough, the wall is smooth

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cthe floor and wall both are smooth surfaces

✓


dthe floor and wall both are rough sur-faces

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Two coplanar couples having equal and op-posite moments_________________?


a balance each other

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b produce a couple and an unbalanced force

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care equivalent

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dcan not balance each other

✓



The product of either force of couple with the arm of the couple is called________________?


aresultant couple

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bmoment of the forces

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c resulting couple

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dmoment of the couple

✓


View Answer moment of the couple

The center of gravity of a uniform lamina lies at_______________?


athe center of heavy portion

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b the bottom surface

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cthe mid point of its axis

✓


dall of the above

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Center of percussion is______________?


athe point of C.G.

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bthe point of metacentre

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cthe point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

✓


dpoint of suspension

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The units of moment of inertia of an area are_______________?


akg m2

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bm4

✓


ckg/m2

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dm3

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View Answer m4

The center of gravity of a triangle lies at the point of__________________?


aconcurrence of the medians

✓


bintersection of its altitudes

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cintersection of bisector of angles

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dintersection of diagonals

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The possible loading in various members of framed structures are_______________?


acompression or tension

✓


b buckling or shear

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cshear or tension

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d all of the above

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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

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b3.0 cm

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c4.0 cm

✓


d5.0 cm

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View Answer 4.0 cm

Pick up the incorrect statement from the following _______________?


aThe C.G. of a circle is at its center

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b The C.G. of a triangle is at the intersection of its medians

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cThe C.G. of a rectangle is at the inter-section of its diagonals

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dThe C.G. of a semicircle is at a distance of r/2 from the center

✓



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