One method of getting a tight fit, say of a metal peg in a hole in a metal block, is to manufacture the peg slightly larger than

Question

2 years ago

13

the hole. The peg is then inserted when at a different temperature than the block. Should the block be hotter or colder than the peg during insertion

1 answer:

Novay_Z [31] · Answer 1 · 2023-05-13T02:49:34+03:00

The block should be colder than the peg during insertion.

To find the answer, we have to know more about the thermal expansion of metal.

<h3>What is thermal expansion of metal?</h3>

Metals' Thermal Expansion The phenomenon of material expanding on heating and contracting on cooling is now well-known.
An object changes in size when heated. Depending on the body's form. It is known as linear expansion if the expansion takes place linearly.

The peg should be warmer than the metal block.
Since the metal peg is made larger, the temperature of the metal block should be lower than that of the peg in order for the metal block's thermal expansion to provide a tight fit when the peg is inserted into the hole and the temperature rises.

Due to the metal's tendency to expand as temperature rises, the hole's size decreases.
As a result, at the time of insertion, the metal block's temperature should be lower than the peg's temperature.

Thus, we can conclude that, the block should be colder than the peg during insertion.

Learn more about thermal expansion here:

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