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Statement I : A brass disc just fits in ...

Statement I : A brass disc just fits in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Statement II : The coefficient of linear expansion for brass is greater than the coefficient of linear expansion for steel.

A

Statement I is true, statement II is true , statement II is a correct explanation for statement I.

B

Statement I is true, statement II is true , statement II is not a correct explanation for statement I.

C

Statement I is true, statement II is false.

D

Statement is false, statement II is true.

Text Solution

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The correct Answer is:
A
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What is the coefficient of linear expansion of brass?

A brass dise fits tightly into the bore of steel palte. Should you apply heat in order to remove the disc from the bore?

Knowledge Check

  • A brass disc just fits inside the hole of an iron plate. To loosen the disc from the hole easily, which of the following operations would be more convenient? (coefficient of linear expansion of brass is more than that of iron).

    A
    the junction should be heated
    B
    the junction should be cooled
    C
    the junction should be hammered without heating or cooling it
    D
    the junction should be heated first and then it should be dipped in water

  • Statement I : The coefficient of apparent expansion can be negative. Statement II : Coefficient of real expansion of a liquid can be less than the coefficient of expansion of vessel.

    A
    Statement I is true, statement II is true , statement II is a correct explanation for statement I.
    B
    Statement I is true, statement II is true , statement II is not a correct explanation for statement I.
    C
    Statement I is true, statement II is false.
    D
    Statement is false, statement II is true.

  • At some temperature T, a bronze pin is a little large fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when (coefficient of linear expansion of bronze is grearter than that of steel)

    A
    only the block is heated
    B
    both block and pin are heated together
    C
    both block and pin are cooled together
    D
    only the pin is cooled

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    A barometer with a brass scale reads 75.34 cm at 25^(@)C . The scale was graduated at 20^(@)C. What will be the reading of the barometer at 0^(@)C ? Coefficient of linear expansion alpha for brass =18 times 10^(-6@)C^(-1) and coefficient of linear expansion gamma for mercury =18 times 10^(-5@)C^(-1).

    Coefficient of linear expansion of iron is 12 times 10^(-6@)C^(-1) - explain the statement.

    A brass disc is stuck in a hole of a steel plate. Should you heat the system to free the disc from the hole? Given, alpha for brass =19 times 10^(-6@)C^(-1)" and " alpha for steel =12 times 10^(-6@)C^(-1).

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