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Machine Design

Machine Design
The railway carriage couplings have

Buttress threads
Knuckle threads
Acme threads
Square threads

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Machine Design
The cam follower extensively used in aircraft engines is

Flat faced follower
Roller follower
Knife edge follower
Spherical faced follower

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Machine Design
The shock resistance of steel is increased by adding

Chromium
Nickel
Nickel and chromium
Cobalt and molybdenum

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Machine Design
Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)

0.124 - (0.684/T)
0.154 - (0.912/T)
0.175 - (0.841/T)
None of these

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Machine Design
Screws used for power transmission should have

Low efficiency
Very fine threads
Strong teeth
High efficiency

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

15 times
20 times
10 times
5 times

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