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Test: Thermodynamic Relations - 1 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Thermodynamic Relations - 1

Test: Thermodynamic Relations - 1 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Test: Thermodynamic Relations - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Thermodynamic Relations - 1 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Thermodynamic Relations - 1 below.
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Test: Thermodynamic Relations - 1 - Question 1

For an isentropic flow along a nozzle, at location A, the static temperature and pressure were measured to be 320 K and 5 bar. What will be the static pressure at the location where the static temperature is 500 K? (Given η = 1.4) 

Detailed Solution for Test: Thermodynamic Relations - 1 - Question 1

For the isentropic flow, adiabatic relations can be applied (isentropic means reversible as well as adiabatic). 
Then using P1 / P2 = (T1 / T2)(η / η - 1) 
P2 = 5 x (500 / 320)1.4 / 0.4 
≅ 23.8 bar.

Test: Thermodynamic Relations - 1 - Question 2

Average coefficient of volume expansion of a substance is denoted by

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Test: Thermodynamic Relations - 1 - Question 3

A gas having a negative Joule-Thomson coefficient ( μj < 0), when throttled, will

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Test: Thermodynamic Relations - 1 - Question 4

The Clausius-Clapeyron equation gives the slope of curve on

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Test: Thermodynamic Relations - 1 - Question 5

Consider the following statements pertaining to the Clapeyron equation:
1. It is useful in estimating properties like enthalpy from other measurable properties.
2. At a change of phase, it can be used to find the latent heat at a given pressure.
3. It is derived from the relationship

Which of the statements given above are correct?

Test: Thermodynamic Relations - 1 - Question 6

What is the unit of Gibbs free energy?

Detailed Solution for Test: Thermodynamic Relations - 1 - Question 6

Gibbs free energy is defined as the thermodynamic potential that is used to calculate the maximum amount of reversible work. It takes place at a constant pressure and temperature. The SI unit is Joule.

Test: Thermodynamic Relations - 1 - Question 7

At chemical equilibrium, Gibbs function is

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(dG)T,P = 0 (equilibrium condition)

Test: Thermodynamic Relations - 1 - Question 8

Which of the following parameter is.the criterion of equilibrium and stability of a system existing at constant volume and constant temperature?

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Test: Thermodynamic Relations - 1 - Question 9

The internal energy of an ideal gas is a function of

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For an ideal Gas
U = f(T) only

Test: Thermodynamic Relations - 1 - Question 10

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