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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Elastic
Brittle
Ductile
Plastic

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Machine Design
The process extensively used for making bolts and nuts is

Extrusion
Cold heading
Cold peening
Hot piercing

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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

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

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° stub system
20° full depth involute system
14½° composite and full depth involute system
None of these

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Angular bevel gears
Internal bevel gears
Mitre gears
Crown bevel gears

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Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.5
0.33
0.55
0.4

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