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Question

If a gas vapor is allowed to expand through a very minute aperture, then such a process is known as ________ .

यदि गैस वाष्प को बहुत ही सूक्ष्म छिद्र के माध्यम से फैलने की अनुमति दी जाती है, तो ऐसी प्रक्रिया को ________ के रूप में जाना जाता है।

A.

free expansion

B.

throttling

C.

hyperbolic expansion 

D.

parabolic expansion

Answer ( Option B)

throttling

Solution

  • The process in which a high pressure of fluid is converted to low pressure by using a throttle valve is throttling.
  • In throttling process enthalpy remains constant, work done is zero.

Examples of throttling process:

  1. Flow through a partially opened valve as in IC engine.
  2. Flow through a very small opening e.g. orifice.

Hence, the correct option is (B).

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