THEORY OF MACHINE QUIZ

For simple harmonic motion of the of follower, a cosine curve represents

Displacement diagram

Velocity diagram

Acceleration diagram

All of these

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The Hooke's joint consists of:

One fork

Two forks

Three forks

Four forks

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Open pairs are those which have

Two elements that permit relative motion

Surface contact between the two elements when in motion

Point or line contact between the two elements when in motion

Elements of pairs not held together mechanically

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

Increases as the radius of rotation decreases

Increases as the radius of rotation increases

Remain constant for all radii of rotation

Decreases as the radius of rotation increases

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In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

Slightly more than 95 mm

45 mm

Slightly less than 95 mm

95 mm

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

(r₁² - r₂²)/(r₁ + r₂)

(r₁² - r₂²)/(r₁ - r₂)

(r₁³ - r₂³)/(r₁² - r₂²)

(r₁³ - r₂³)/(r₁ - r₂)

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TJIE horse power transmitted by a belt is dependent upon

Tension on slack side of belt

Tension on tight side of belt

Radius of pulley

All of these

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The Bifilar suspension method is used to determine

Centripetal acceleration

Position of balancing weights

Moment of inertia

Natural frequency of vibration

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The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Greater than

Less than

Equal to

None of these

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In a pantograph, all the pairs are

Sliding pairs

Spherical pairs

Self-closed pairs

Turning pairs

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