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Machine Design

Machine Design
The draw of cotter should not be more than

3 mm
12 mm
6 mm
8 mm

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Machine Design
A key way lowers

The strength of the shaft
The ductility of the shaft
Both the strength and rigidity of the shaft
The rigidity of the shaft

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Machine Design
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

2 d
1 d
2.5 d
1.5 d

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Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Process annealing
Spheroidising
Normalising
Full annealing

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Machine Design
Which of the following screw thread is used for power transmission in one direction only?

Square threads
Buttress threads
Acme threads
Multiple threads

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Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

W/9
W/2
2W/3
8W/9

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