Civil Engineering MCQs

Page No. 208

Maximum principal stress theory for the failure of a material at elastic point, is known________________?


aGuest’s or Trecas’ theory

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bSt. Venant’s theory

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cRankine’s theory

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dVon Mises’ theory

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View Answer Rankine’s theory

The unit of work or energy in S.I. units is________________?


anewton

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bpascal

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c kilogram meter

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djoule

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View Answer joule

Which of the following is not the unit of pressure ?


akg/cm

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bata

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catmosphere

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dnewton

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View Answer newton

The forces, which meet at one point, but their lines of action do not lie in a plane, are called______________?


acoplanar non-concurrent forces

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b non-coplanar concurrent forces

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cnon-coplanar non-concurrent forces

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dintersecting forces

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Which of the following is not a scalar quantity__________________?


atime

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bmass

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cvolume

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dacceleration

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View Answer acceleration

The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are____________________?


a 2 and V6

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b3 and 1 kg

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cV5andV5

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d2 and 5

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View Answer V5andV5

Two non-collinear parallel equal forces acting in opposite direction________________?


abalance each other

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bconstitute a moment

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cconstitute a couple

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dconstitute a moment of couple

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View Answer constitute a couple

According to law of triangle of forces______________?


athree forces acting at a point will be in equilibrium

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b three forces acting at a point can be represented by a triangle, each side being proportional to force

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c if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

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d if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

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According to principle of moments_________________?


aif a system of coplanar forces is in equilibrium, then their algebraic sum is zero

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b if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

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c the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point

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dpositive and negative couples can be balanced

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If a rigid body is in equilibrium under the action of three forces, then_______________?


athese forces are equal

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bthe lines of action of these forces meet in a point

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c the lines of action of these forces are parallel

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dB. and C. above

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View Answer B. and C. above

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