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.Management Sciences
Category: Engineering Mechanics
Tangent of angle of friction is equal to__________________?
A. kinetic friction
B. limiting friction
C. angle of repose
D. coefficient of friction
E. friction force
The maximum frictional force which comes into play when a body just begins to slide over another surface is called__________________?
A. limiting friction
B. sliding friction
C. rolling friction
D. kinematic friction
E. dynamic friction
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
Which of the following is not the unit of power ?
A. kW (kilowatt)
B. hp (horse power)
C. kcal/sec
D. kg m/sec
E. kcal/kg sec
According to principle of moments__________________?
A. if a system of coplanar forces is in equilibrium, then their algebraic sum is zero
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
C. the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point
D. positive and negative couples can be balanced
E. none of the above
Frictional force encountered after commencement of motion is called ___________________?
A. post friction
B. limiting friction
C. kinematic friction
D. frictional resistance
E. dynamic friction
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
In ideal machines__________________?
A. mechanical advantage is greater than velocity ratio
B. mechanical advantage is equal to velocity ratio
C. mechanical advantage is less than velocity ratio
D. mechanical advantage is unity
E. none of the above
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
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