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.Management Sciences
Category: Strength of Materials
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?
A. downwards at its upper end
B. upwards at its upper end
C. perpendicular to the wall at its upper end
D. zero at its upper end
E. none of the above
The algebraic sum of moments of the forces forming couple about any point in their plane is________________?
A. equal to the moment of the couple
B. constant
C. both of above are correct
D. both of above are wrong
E. none of the above
If a rigid body is in equilibrium under the action of three forces, then_______________?
A. these forces are equal
B. the lines of action of these forces meet in a point
C. the lines of action of these forces are parallel
D. B. and C. above
E. none of the above
Which of the following is not the unit of work, energy and heat ?
A. kcal
B. kg m
C. kWhr
D. hp
E. hp hr
Which of the following is not a scalar quantity__________________?
A. time
B. mass
C. volume
D. density
E. acceleration
When trying to turn a key into a lock, following is applied___________________?
A. coplanar force
B. non-coplanar forces
C. lever
D. moment
E. couple
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________?
A. catenary
B. parabola
C. hyperbola
D. elliptical
E. circular arc
The product of either force of couple with the arm of the couple is called________________?
A. resultant couple
B. moment of the forces
C. resulting couple
D. moment of the couple
E. none of the above
Which of the following is not a vector quantity_______________?
A. weight
B. velocity
C. acceleration
D. force
E. moment
Which of the following do not have identical dimensions ?
A. Momentum and impulse
B. Torque and energy
C. Torque and work
D. Kinetic energy and potential energy
E. Moment of a force and angular momentum
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