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MP Sub-Engineer ME: Properties of Pure Substances Quiz 6

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Question 1

The correct T – s diagram of Steam Rankine cycle with constant pressure (p = 30 Mpa) heat addition is given as

Question 2

The increase in pressure ____________.

Question 3

What will be the dryness fraction for liquid (m₁) and vapour (m₂) mixture?

Question 4

A closed system contains 10 kg of saturated liquid ammonia at 10 °C. Heat addition required to convert the entire liquid into saturated vapour at a constant pressure is 16.2 MJ. If the entropy of the saturated liquid is 0.88 kJ/kg.K, the entropy (in kJ/kg.K) of saturated vapour is _________

Question 5

According to Dalton’s law, the total pressure of the mixture of gases is equal to __________.

Question 6

What the region (2) in the p-V diagram given below is called?

Question 7

A pure substance at 8 MPa and 400 °C is having a specific internal energy of 2864 kJ/kg and a specific volume of 0.03432 $Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-2014-Set-2_files\image071.png$ /kg. Its specific enthalpy (in kJ/kg) is ______.

Question 8

Superheated vapour behaves _________.

Question 9

On a U-V diagram, triple point is a _________.

Question 10

Consider the following statements pertaining to the properties of perfect, non-reacting gas mixtures:
1) The total volume of a mixture is the sum of partial volumes at the same pressure and temperature.
2) The entropy of a mixture of gases is the same as the entropies of the constituents.
3) The total pressure of a mixture of gases is the sum of the partial pressure of the substances.
4) The mole fraction of a mixture of gases is equal to both pressure and volume fraction.
Which of the above statements is/are correct?

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AE & JE Exams Mechanical Engineering

Apr 11AE & JE Exams