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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

420 to 450
More than 400
340 to 360
300 to 320

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

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

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is about yield point divided by safety factor
Approaches yield point
Is 50% of yield point
Is just sufficient to hold parts together

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Machine Design
Which of the following pipe joints would be suitable for pipes carrying steam?

Threaded
Flanged
Expansion
Bell and spigot

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Machine Design
Silver based solder is used for

Flaring
Brazing
Soft soldering
Fusion welding

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

2 τ
τ
4 τ
τ/2

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