Hello friends welcome in mechanical engineering mcq website. In this lecture we solveing the Thermodynamics (som) subject multiple choice questions Mcq on properties of pure substance - Questions and answers (objectives questions).
Multiple choice questions Mcq on properties of pure substance - Questions and answers
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| Mcq on properties of pure substance - Questions and answers |
MCQ - 1
The mollier diagram between
A) Stress vs strain
B) Pressure vs volume
C) Temperature vs entropy
D) Enthalpy vs entropy
Answer - A
MCQ - 2
Due to sensible heat temperature is ............
A) Change
B) Does not change
C) Can't say
D) None of these
Answer - A
MCQ - 3
Due to Laten heat temperature is ............
A) Change
B) Does not change
C) Can't say
D) None of these
Answer - B
MCQ - 4
Latent heat of steam with decreased in pressure
A) Decreased
B) Increased
C) Same
D) None of these
Answer - A
MCQ - 5
The Triple point point temperature of water is
A) 270.16 k
B) 273.16 k
C) 275.16 k
D) 277.16 k
Answer - B
MCQ - 6
The critical pressure of water is
A) 20 Mpa
B) 22.12 Mpa
C) 24.12 Mpa
D) 26.12 Mpa
Answer - B
MCQ - 7
The degree of freedom at critical point is
A) Zero
B) 0.5
C) One
D) Two
Answer - A
MCQ - 8
The critical temperature water is
A) 274.15 °c
B) 374.15 °c
C) 174.15 °c
D) 474.15 °c
Answer - B
MCQ - 9
When water is heated with rise (change) in temperature that heat is called as.......
A) Sensible heat
B) Latent heat
C) Entropy
D) Enthalpy
Answer - A
MCQ - 10
When water is heated without rise (change) in temperature that heat is called as.......
A) Sensible heat
B) Latent heat
C) Entropy
D) Enthalpy
Answer - B
MCQ - 11
At triple point for water which of the following properties does not equal to zero.
A) Entropy
B) Enthalpy
C) Pressure
D) internal energy
Answer - B
MCQ - 12
Triple point of pure substance is a point at which
A) liquid and vapour exist together
B) Solid and vapour exist together
C) Solid and vapour exist together
D) Solid ,liquid and vapor exist together
Answer - D
MCQ - 13
At a critical point saturated liquid line and saturated vapour line meet
A) True
B) False
Answer - A
MCQ - 14
The joule Thompson coefficient for aan ideal gas is ..........
A) Less than zero
B) zero
C) More than zero
D) one
Answer - B
Solution
The for a ideal gas joule Thompson coefficient value is zero because ideal gas is neither expanding at cooled or warm conditions
MCQ - 15
At triple point internal energy becomes............
A) zero
B) 0.5
C) one
D) Two
Answer - A
MCQ - 16
At Critical point of value of Vg - Vf is
A) zero
B) one
C) Two
D) Infinite
Answer - A
MCQ - 17
The process of sublimation occurs in case of
A) Solid oxygen
B) Solid carbon dioxide
C) Liquid Nitrogen
D) Air
Answer - B
MCQ - 18
The dryness fraction of superheater steam is takes as
A) x = 0
B) x = 0.5
C) x = 1
D) x = 2
Answer - C
MCQ - 19
At triple point entropy becomes............
A) zero
B) 0.5
C) one
D) Two
Answer - A
MCQ - 20
The dryness fraction at saturated vapours line is takes as
A) x = 0
B) x = 0.5
C) x = 1
D) x = 2
Answer - C
MCQ - 21
The dryness fraction on saturated liquid line is takes as
A) x = 0
B) x = 0.5
C) x = 1
D) x = 2
Answer - A
MCQ - 22
The critical specific volume of water is
A) 0.317 m³ / kg
B) 0.0317 m³ / kg
C) 0.00317 m³ / kg
D) 0.000317 m³ / kg
Answer - C
MCQ - 23
The degree of freedom at Tripple point is
A) Zero
B) 0.5
C) One
D) Two
Answer - A
MCQ - 24
The Tripple point temperature water is
A) 273.15 °c
B) 373.15 °c
C) 173.15 °c
D) 473.15 °c
Answer - A
MCQ - 25
Triple point on t-s diagram is
A) liquid and vapour exist together
B) Solid and vapour exist together
C) Solid and vapour exist together
D) Solid ,liquid and vapor exist together
Answer - D
this lecture we solveing the Thermodynamics (som) subject multiple choice questions Mcq on properties of pure substance - Questions and answers (objectives questions).
If you have any queri about pure substance then comment
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