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Machine Design

Machine Design
In Vickers hardness testing, the pyramid indentor apex is

122°
136°
40°
152°

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Machine Design
The material commonly used for machine tool bodies is

Aluminium
Mild steel
Brass
Cast iron

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

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

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Machine Design
18/8 steel contains

18% nickel and 8% vanadium
18% vanadium and 8% nickel
18% chromium and 8% nickel
18% nickel and 8% chromium

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Machine Design
The velocity of sliding __________ the distance of the point of contact from the pitch point.

Is inversely proportional to
Is directly proportional to
Is equal to cos φ multiplied by
Does not depend upon

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

3/ (3 + v)
6/ (6 + v)
0.75/ (0.75 + √v)
4.5/ (4.5 + v)

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