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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 6
36.
The acceleration of piston in a reciprocating steam engine is given by (where ω = Angular velocity of crank, r = Radius of crank pin circle, θ = Angle turned by crank from inner dead centre, and n = Ratio of length of connecting rod to the radius of crank)
Answer: Option
Explanation:
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37.
Torsional vibrations are said to occur when the particles of a body moves
perpendicular to its axis
parallel to its axis
in a circle about its axis
none of these
Answer: Option
Explanation:
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38.
A body is said to vibrate with simple harmonic motion if its acceleration is proportional to the distance from the mean position.
Yes
No
Answer: Option
Explanation:
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39.
For the isochronous Porter governor, the controlling force curve is a straight line passing through the origin.
Correct
Incorrect
Answer: Option
Explanation:
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40.
The virtual or equivalent eccentric for the Meyer's expansion valve is defined as an eccentric having such a length and angle of advance that will cause cut-off to take place at the same position, as is caused by the combined effect of main eccentric and expansion eccentric.
Right
Wrong
Answer: Option
Explanation:
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