directly
inversely
✅ The correct answer is option A.
Engineering Mechanics MCQs
Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __________ than that about X-X axis.
two times
same
half
✅ The correct answer is option A.
The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
Correct
Incorrect
✅ The correct answer is option A.
A non-reversible machine is also called a self-locking machine.
Agree
Disagree
✅ The correct answer is option A.
The moment of inertia of a thin disc of mass m and radius r, about an axis through its centre of gravity and perpendicular to the plane of the disc is
mr2/2
mr2/4
mr2/6
mr2/8
✅ The correct answer is option A.
The force, by which the body is attracted, towards the centre of the earth, is called
impulsive force
mass
weight
momentum
✅ The correct answer is option C.
A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.
TRUE
FALSE
✅ The correct answer is option B.
An ideal machine is one whose efficiency is
between 60 and 70 %
between 70 and 80%
between 80 and 90%
100%
✅ The correct answer is option D.
A smooth cylinder lying on a __________ is in neutral equilibrium.
curved surface
convex surface
horizontal surface
✅ The correct answer is option C.