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Machine Design

Machine Design
Crushing resistance required to crush the rivet per pitch length is

(p - d) t.σc
p.d.σc
p.t.σc
n.d.t.σc

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Machine Design
The contact ratio for gears is

None of these
Greater than one
Zero
Less than one

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Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Pitch circle diameter × sinφ
Pitch circle diameter × cosφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

(T₁ + T₂ + Tc)/2
(T₁ - T₂ + Tc)/2
T₁ + T₂ + Tc
T₁ - T₂ + Tc

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Normal pitch
Axial pitch
Diametral pitch
Module

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Machine Design
Resistance to fatigue of a material is measured by

Elastic limit
Endurance limit
Young's modulus
Coefficient of elasticity

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