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Machine Design

Machine Design
The standard length of the shaft is

6 m
5 m
All of these
7 m

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Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

(k₁ k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ k₂)
(k₁ - k₂)/ (k₁ + k₂)
(k₁ + k₂)/ (k₁ k₂)

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Machine Design
The resultant axial load on a bolt depends upon

Initial tension due to tightening of the bolt
All of these
Relative elastic yielding of the bolt and the connected members
External load applied

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

Greater than unity
Less than unity
Equal to 1
None of these

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Machine Design
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

Diametral pitch
Module
Axial pitch
Normal pitch

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Machine Design
When the fulcrum is in between the load and effort, the lever is said to be of

Third type
Any one of these
First type
Second type

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