The forces, which meet at one point, but their lines of action do not lie in a plane, are called
A. Coplanar non-concurrent forces
B. Non-coplanar concurrent forces
C. Non-coplanar non-concurrent forces
D. Intersecting forces
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The possible loading in various members of framed structures are
A. Compression or tension
B. Buckling or shear
C. Shear or tension
D. All of the above
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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
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The loss of kinetic energy during inelastic impact, is given by
(where m1 = Mass of the first body, m2 = Mass of the second body, u1 and u2 = Velocities of the first and second bodies respectively.)
A. 2 ( m 1 + m 2 ) m 1 m 2 ( u 1 − u 2 ) 2
B. m 1 m 2 2 ( m 1 + m 2 ) ( u 1 − u 2 ) 2
C. 2 ( m 1 + m 2 ) m 1 m 2 ( u 1 2 − u 2 2 )
D. m 1 m 2 2 ( m 1 + m 2 ) ( u 1 2 − u 2 2 )
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Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is ________ than that about X-X axis.
A. Two times
B. Same
C. Half
D. None of these
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In a framed structure, as shown in the below figure, the force in the member AB is __________ the force in member AC.
A. Half
B. Equal to
C. Double
D. None of these
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A force is completely defined when we specify
A. Magnitude
B. Direction
C. Point of application
D. All of the above
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The C.G. of a solid hemisphere lies on the central radius
A. At distance 2 3 r from the plane base
B. At distance 4 3 r from the plane base
C. At distance 5 3 r from the plane base
D. At distance 8 3 r from the plane base
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If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.
A. First
B. Second
C. Third
D. None of these
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The unit of moment of inertia of an area is
A. kg-m2
B. kg-m-s2
C. kg/m2
D. m4
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The unit of work or energy in S.I. units is
A. Newton
B. Pascal
C. Watt
D. Joule
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Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is
A. 4 b h 3
B. 8 b h 3
C. 12 b h 3
D. 36 b h 3
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The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________
h gra . A. Less than
B. Greater than
C. Equal to
D. None of these
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The efficiency of a screw jack is maximum, when (where α = Helix angle and φ = Angle of friction.)
A. α = 4 5 ∘ + 2 φ
B. α = 4 5 ∘ − 2 φ
C. α = 9 0 ∘ + φ
D. α = 9 0 ∘ − φ
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Efficiency of a screw jack is given by (where α = Helix angle and φ = Angle of friction.)
A. tan α tan ( α + φ )
B. tan ( α + φ ) tan α
C. tan α tan ( α − φ )
D. None of these
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In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)
A. P = W tan (α - φ)
B. P = W tan (α + φ)
C. P = W tan (φ - α)
D. P = W cos (α + φ)
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Joule is the unit of
A. Force
B. Work
C. Power
D. Velocity
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When trying to turn a key into a lock, following is applied
A. Coplanar force
B. Non-coplanar forces
C. Moment
D. Couple
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Kinetic friction is the
A. Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction
B. Ratio of limiting friction and normal reaction
C. The friction force acting when the body is just about to move
D. The friction force acting when the body is in motion
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Two non-collinear parallel equal forces acting in opposite direction
A. Balance each other
B. Constitute a moment
C. Constitute a couple
D. Constitute a moment of couple
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