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Machine Design

Machine Design
The draw of cotter need not exceed

5 mm
20 mm
3 mm
10 mm

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kt - 1)/ (Kf - 1)
(Kf - 1)/ (Kt - 1)
(Kf + 1)/ (Kt + 1)
(Kt + 1)/ (Kf + 1)

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Machine Design
The permissible stress for carbon steel under static loading is generally taken as

7500-10,000 kg/cm²
2000-3000 kg/m²
3000-4000 kg/cm²
4000-4500 kg/cm²

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Machine Design
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Less than 20d
Greater than 30d
Equal to inside diameter of pipe
Between 20d and 30d

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Machine Design
Maximum principal stress theory is applicable for

Elastic materials
All of these
Brittle materials
Ductile materials

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

18
24
14
12

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