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.Management Sciences
Category: Engineering Mechanics
The units of moment of inertia of an area are__________________?
A. kg m2
B. m4
C. kg/m2
D. m3
E. kg/m4
Which of the following is not the unit of energy_________________?
A. kg m
B. kcal
C. wattr
D. watt hours
E. kg m x (m/sec)2
The coefficient of friction depends on________________?
A. area of contact
B. shape of surfaces
C. strength of surfaces
D. nature of surface
E. all of the above
If three forces acting in different planes can be represented by a triangle, these will be in________________?
A. non-equilibrium
B. partial equilibrium
C. full equilibrium
D. unpredictable
E. none of the above
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
E. none of the above
The necessary condition for forces to be in equilibrium is that these should be_________________?
A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else
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
The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?
A. 20 kg, – ve sense
B. 20 kg, + ve sense
C. 10 kg, + ve sense
D. 10 kg, – ve sense
E. 45 kg, + ve sense
The co-efficient of friction depends upon_______________?
A. nature of surfaces
B. area of contact
C. shape of the surfaces
D. ail of the above.
E. A. and B. above
The center of gravity of a uniform lamina lies at____________________?
A. the center of heavy portion
B. the bottom surface
C. the mid point of its axis
D. all of the above
E. none of the above
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