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Theory of Machine

Theory of Machine
The brake commonly used in railway trains is

Internal expanding brake
Band brake
Band and block brake
Shoe brake

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Theory of Machine
Coriolis component acts

Somewhere in between above two
Perpendicular to sliding surfaces
None of these
Along sliding surfaces

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Theory of Machine
The velocity of sliding of meshing gear teeth is (Where ω₁ and ω₂ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)

(ω₁ + ω₂) y
(ω₁ × ω₂) y
(ω₁ + ω₂)/y
(ω₁/ω₂) y

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Theory of Machine
A spring controlled governor is said to be isochronous when the controlling force

Decreases as the radius of rotation increases
Increases as the radius of rotation decreases
Increases as the radius of rotation increases
Remain constant for all radii of rotation

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Theory of Machine
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is

12
25
32
16

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Theory of Machine
Which of the following is an inversion of Single slider crank chain?

Elliptical trammel
Rotary engine
Oldham’s coupling
Beam engine

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