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Machine Design

Machine Design
The wear load should be __________ the dynamic load.

None of these
Greater than
Less than
Equal to

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

Multiple threads
Square threads
Acme threads
Buttress threads

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Machine Design
The included angle in unified of American National threads is

60°
55°
29°
47°

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Machine Design
Multiple threads are used to secure

High efficiency
Low efficiency
High load lifting capacity
High mechanical advantage

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Machine Design
The acme threads are usually found on

Spindles of bench vices
Feed mechanism of machine tools
Screw cutting lathes
Railway carriage couplings

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

Soft key
Hollow saddle key
None of these
Hollow key

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