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Theory of Machine

Theory of Machine
Davis steering gear consists of

Turning pairs
Rolling pairs
Higher pairs
Sliding pairs

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Theory of Machine
Which of the following mechanism is obtained from lower pair?

Gyroscope
Pantograph
All of these
Valve and valve gears

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Theory of Machine
The working depth of a gear is the radial distance from the

Addendum circle to the clearance circle
Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth
Top of a tooth to the bottom of a tooth

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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
When the axes of the first and last wheels are coaxial, then the train is known as

Compound train of wheels
Simple train of wheels
Epicyclic gear train
Reverted gear train

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Theory of Machine
The brake commonly used in railway trains is

Band and block brake
Internal expanding brake
Shoe brake
Band brake

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