Top 150+ Solved Engineering Mechanics MCQ Questions Answer
Q. A framed structure is perfect, if the number of members are
a. equal to
b. less than
c. greater than
d. either (b) or (c)
Q. A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act
a. downward at its upper end
b. upward at its upper end
c. zero at its upper end
d. perpendicular to the wall at its upper end
Q. Non-coplaner non-concurrent forces are those forces which
a. meet at one point, but their lines of action do not lie on the same plane
b. do not meet at one point and their lines of action do not lie on the same plane
c. do not meet at one point, but their lines of action lie on the same plane
d. none of the above
Q. A machine having an efficiency greater than 50%, is known as
a. reversible machine
b. non-reversible machine
c. neither reversible nor non-reversible machine
d. ideal machine
Q. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
a. P = Q
b. Q = R
c. Q = 2R
d. none of these
Q. Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
a. bh3 / 4
b. bh3 / 8
c. bh3 / 12
d. bh3 / 36
Q. According to lami's theorem
a. the three forces must be equal
b. the three forces must be at 120? to each other
c. the three forces must be in equilibrium
d. if the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two
Q. A screw jack used for lifting the loads is
a. a reversible machine
b. a non-reversible machine
c. an ideal machine
d. none of these
Q. The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as
a. coplaner concurrent forces
b. coplaner non-concurrent forces
c. like parallel forces
d. unlike parallel forces
Q. The moment of inertia of a square of side about its diagonal is
a. a2 / 8
b. a3 / 12
c. a4 / 12
d. a4 / 16
Q. A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
a. towards the wall at its upper and
b. away from the wall at its upper end
c. downward at its upper end
d. upward at its upper end
Q. The forces which do not meet at one point and their lines of action do not lie on the same plane are known as
a. coplaner concurrent forces
b. coplaner non-concurrent forces
c. non-coplaner concurrent forces
d. none of these
Q. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of ? rad / s2, is
a. a = ? / r
b. a = ?.r
c. a = r / ?
d. none of these