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Manufacturing And Production Technology

Manufacturing And Production Technology
The maximum production of small and slender parts is done by

Watch maker's lathe
Sliding head stock automatic lathe
Capstan lathe
Multi-spindle automatic lathe

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Manufacturing And Production Technology
A bottoming tap has

Its end tapered for about eight or ten threads
Its end tapered for about three or four threads
Full threads for the whole of its length
None of these

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Manufacturing And Production Technology
In an interchangeable assembly, shafts of size 25.000 -0.0100⁺⁰∙⁰⁴⁰ mm mate with holes of size 25.000 -0.010⁺⁰∙⁰²⁰ mm. The maximum possible clearance in the assembly will be

10 microns
60 microns
20 microns
30 microns

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Manufacturing And Production Technology
Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is

(4π/6)² × (r/l)⁴
(4π/6)³ × (r/l)⁶
(4π/6)² × (r/l)³
(4π/6) × (r/l)²

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Manufacturing And Production Technology
A lathe with four steps on the cone pulley and with back-gears will have

Four indirect speeds
Four direct and four indirect speeds
Eight indirect speeds
Four direct speeds

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Manufacturing And Production Technology
Slow speed of the spindle is necessary in

All of these
Turning a work of larger diameter
Turning a hard or tough material
Thread cutting

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