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Machine Design

Machine Design
The crest diameter of a screw thread is same as

Minor diameter
Core diameter
Major diameter
Pitch diameter

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Machine Design
The rolling contact bearings are known as

Thick lubricated bearings
Plastic bearings
Thin lubricated bearings
Antifriction bearings

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

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Machine Design
Ball bearing type screws are found in following application

Screw jack
Crane
Aeroplane engines
Steering mechanism

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Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Flat saddle key
Woodruff key
Feather key
Hollow saddle key

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Machine Design
The pipe joint mostly used for pipes carrying water at low pressures is

Union joint
Spigot and socket joint
Socket joint
Nipple joint

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