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Machine Design

Machine Design
According to Indian standards, total numbers of tolerance grades are

20
18
8
12

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Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Inside diameter
Outside diameter
Height

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Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

(p - d) t.σt
p.t.σt
p.d.σt
(p - d) σt

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Machine Design
In a horizontal flat belt drive, it is customary to use

Bottom side of belt as slack side
Idler pulley
Top side of belt as slack side
None of these

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Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2136 N-m
2050 N-m
2100 N-m
2000 N-m

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Machine Design
An alien bolt is

Provided with hexagonal depression in head
Self locking bolt
Used in high speed components
Same as stud

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