A. equal to the moment of the couple
B. constant
C. both of above are correct
D. both of above are wrong
✅ The correct answer is option A.
Strength of Materials MCQs
In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?
A. two members with unknown forces of the frame
B. three members with unknown forces of the frame
C. four members with unknown forces of the frame
D. three members with known forces of the frame
✅ The correct answer is option B.
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
✅ The correct answer is option C.
D’ Alembert’s principle is used for___________________?
A. reducing the problem of kinetics to equivalent statics problem
B. determining stresses in the truss
C. stability of floating bodies
D. designing safe structures
✅ The correct answer is option A.
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to______________?
A. 25
B. 50
C. 100
D. 250
✅ The correct answer is option B.
Center of percussion is______________?
A. the point of C.G.
B. the point of metacentre
C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
D. point of suspension
✅ The correct answer is option C.
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.
✅ The correct answer is option A.
If a number of forces act simultaneously on a particle, it is possible_________________?
A. not a replace them by a single force
B. to replace them by a single force
C. to replace them by a single force through C.G.
D. to replace them by a couple
✅ The correct answer is option B.
A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is_________________?
A. 0°
B. 30°
C. 45°
D. 60°
✅ The correct answer is option C.
Center of gravity of a solid cone lies on the axis at the height_______________?
A. one-fourth of the total height above base
B. one-third of the total height above base
C. one-half of the total height above base
D. three-eighth of the total height above the base
✅ The correct answer is option A.