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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 2
11.
Which of the following statement is correct ?
The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation.
The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity.
The velocity of a particle moving with simple harmonic motion is zero at the mean position.
The acceleration of the particle moving with simple harmonic motion is maximum at the mean position.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
stable
unstable
isochronous
hunt
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the __________ pulley must be taken into consideration.
smaller
larger
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The maximum frictional force, which comes into play, when an body just begins to slide over the surface of the other body, is known as
static friction
dynamic friction
limiting friction
coefficient of friction
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In a four stroke I.C. engine, the turning moment during the compression stroke is
positive throughout
negative throughout
positive during major portion of the stroke
negative during major portion of the stroke
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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