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Machine Design

Machine Design
A transmission shaft includes

Line shaft
Over head shaft
All of these
Counter shaft

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Machine Design
The buckling load will be maximum for a column, if

One end of the column is hinged and the other end is free
Both ends of the column are hinged
One end of the column is clamped and the other end is free
Both ends of the column are clamped

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

30 kN/m
6 kN/m
24 kN/m
12 kN/m

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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)

4 d
5 d
3 d
2 d

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Machine Design
The included angle for the British standard whitworth thread is

55°
29°
47.5°
60°

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Machine Design
A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as

Crown Bevel gears
Mitre gears
Internal bevel gears
Angular bevel gears

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