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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 1
36.
The sliding pairs, turning pairs and screw pairs form lower pairs.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
When a particle moves round the circumference of a circle of radius r with ω rad/s, then its maximum acceleration is ω2r.
Right
Wrong
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The static friction
bears a constant ratio to the normal reaction between the two surfaces
is independent of the area of contact, between the two surfaces
always acts in a direction, opposite to that in which the body tends to move
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of
2 mm
2.22 mm
2.50 mm
3.0 mm
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to
90° and 180°
45° and 225°
180° and 270°
270° and 360°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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