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Machine Design

Machine Design
For tight leakage joints, following type of thread is best suited

Metric
Buttress
NPT (national pipe threads).
Square

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

0.40 to 0.60%
0.20 to 0.40%
None of these
0.35 to 0.45%

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Machine Design
The product of the diametral pitch and circular pitch is equal to

1/π
1
π × number of teeth
π

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Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Metric
Acme
Square
Buttress

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Machine Design
A chain drive transmits __________ power as compared to belt drive.

More
Less
Same
None of these

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Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
Key is made the weakest
Key is made the strongest
All the three are designed for equal strength

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