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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 10
46.
The instantaneous centre of a rigid thin disc rolling on a plane rigid surface is located at
the centre of the disc
the point of contact
an infinite distance on the plane surface
the point on the circumference situated vertically opposite to the contact point
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
In a flat collar pivot bearing, the moment due to friction is proportional to
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
sum
difference
product
ratio
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
the sum of the two masses is equal to the total mass of body
the centre of gravity of the two masses coincides with that of the body
the sum of mass moment of inertia of the masses about their centre of gravity is equal to the mass moment of inertia of the body
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in __________ directions.
same
opposite
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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