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Machine Design

Machine Design
The included angle for the British Association thread is

55°
29°
47.3°
60°

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Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

5 d
4 d
2 d
3 d

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Could be left or right hand
Right hand with same pitch
Left hand with same pitch
Right hand with fine pitch

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

7.5 kN
10.6 kN
15 kN
22.5 kN

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

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

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Machine Design
According to Indian standard specifications, 100 H6/g5 means that the

Actual size is 100 mm
Basic size is 100 mm
Difference between the actual size and basic size is 100 mm
None of these

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