Question

A brass stopper snuggly fits in the hole of steel
plate. To remove the stopper easily, the system​

Answer 1

A brass stopper snuggly fits in the hole of steel  plate. To remove the stopper easily, the system​ should be cooled down.

• The linear expansion of coefficient of brass is more than that of steel.
• Thermal expansion coefficient of brass is  20 × 10`6 °C whereas that of steel is  15 × 10`6 °C.  Hence brass expands or shrinks faster than steel.
• It is important to cool the system which causes more brass disk contraction and less steel plate contraction. The stopper turns off.

Answer 2

ANSWER

IT SHOULD BE COOLED.

Explanation:

• A brass disc is fitted tightly in a hole in a steel plate. To loosen it, the disc from hole should be cooled the disc contracts and can be removed.

• Thermal expansion coefficient of brass is ˜ 20 × 10-6 /°C whereas that of steel is ˜ 15 × 10-6 /°C. Hence brass expands/shrinks faster than steel. So the brass disc from the hole of steel plate can be loosened if the system is cooled.

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