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Theory of Machine

Theory of Machine
A cam with a roller follower would constitute following type of pair

Open pair
Higher pair
Close pair
Lower pair

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Theory of Machine
The Hooke's joint consists of:

Four forks
Two forks
Three forks
One fork

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Theory of Machine
A reed type tachometer use the principle of

Transverse vibration
Longitudinal vibration
Torsional vibration
Damped free vibration

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Theory of Machine
If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

90°
360°
0°
180°

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Theory of Machine
The mechanism consisting of three turning pairs and one sliding pair, is called a

Whitworth quick return motion mechanism
Single slider crank chain
Crank and slotted lever quick return motion mechanism
All of these

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Theory of Machine
In a flat collar pivot bearing, the moment due to friction is proportional to

(r₁³ - r₂³)/(r₁ - r₂)
(r₁³ - r₂³)/(r₁² - r₂²)
(r₁² - r₂²)/(r₁ - r₂)
(r₁² - r₂²)/(r₁ + r₂)

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