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Machine Design

Machine Design
Shear stress theory is applicable for

Ductile materials
Brittle materials
All of these
Elastic materials

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Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

Smaller
None of these
Greater
Medium

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

P
F + P
F.P
F

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Machine Design
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

T sec³φ
T sec²φ
T cosecφ
T/sec³φ

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Machine Design
A steel containing up to 0.15% carbon is known as

Mild steel
Medium carbon steel
High carbon steel
Dead mild steel

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Machine Design
Multiple threads are used to secure

High load lifting capacity
High efficiency
High mechanical advantage
Low efficiency

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