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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Compression
Tension
All of these

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Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-fourth
One-half
One-third
Double

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Machine Design
In order to remove internal stresses produced by hardening the steel, the process usually adopted is

Spheroidizing
Tempering
Annealing
Normalizing

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Machine Design
Which of the following screw thread is adopted for power transmission in either direction?

Buttress threads
Multiple threads
Square threads
Acme threads

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Machine Design
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

Less than 1/10
None of these
Greater than 1/10
Equal to 1/10

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Machine Design
The rivet head used for boiler plate riveting is usually

Counter sunk head
Pan Head
Conical head
Snap head

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