Explore topic-wise MCQs in Thermodynamics.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

Determine the specific volume of R-134a at 1 MPa and 50°C, using ideal gas equation of state.

A. 0.022325 m3/kg
B. 0.024325 m3/kg
C. 0.025325 m3/kg
D. 0.026325 m3/kg
Answer» C. 0.025325 m3/kg
Discussion
2.

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the volume occupied by the vapour phase.

A. 0.0775 m3
B. 0.0575 m3
C. 0.0975 m3
D. 0.0375 m3
Answer» B. 0.0575 m3
Discussion
3.

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the quality.

A. 0.127
B. 0.137
C. 0.147
D. 0.157
Answer» E.
Discussion
4.

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the temperature.

A. -10.60°C
B. -13.60°C
C. -15.60°C
D. -19.60°C
Answer» D. -19.60°C
Discussion
5.

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.

A. 1.73 m3
B. 2.73 m3
C. 3.73 m3
D. 4.73 m3
Answer» E.
Discussion
6.

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the pressure in the tank.

A. 60.183 kPa
B. 70.183 kPa
C. 80.183 kPa
D. 90.183 kPa
Answer» C. 80.183 kPa
Discussion
7.

A piston –cylinder device contains 0.06m3 of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.

A. 0.104 kg
B. 0.124 kg
C. 0.134 kg
D. 0.114 kg
Answer» E.
Discussion
8.

A rigid tank contains 50 kg of saturated liquid water at 90°C. Determine the pressure in the tank and the volume of the tank.

A. 0.0518 m3
B. 0.0618 m3
C. 0.0718 m3
D. 0.0818 m3
Answer» B. 0.0618 m3
Discussion
9.

AN_80_LITRE_VESSEL_CONTAINS_4_KG_OF_R-134A_AT_A_PRESSURE_OF_160_KPA._DETERMINE_THE_VOLUME_OCCUPIED_BY_THE_VAPOUR_PHASE.?$

A. 0.0775 m<sup>3</sup>
B. 0.0575 m<sup>3</sup>
C. 0.0975 m<sup>3</sup>
D. 0.0375 m<sup>3</sup>
Answer» B. 0.0575 m<sup>3</sup>
Discussion
10.

AN_80_LITRE_VESSEL_CONTAINS_4_KG_OF_R-134A_AT_A_PRESSURE_OF_160_KPA._DETERMINE_THE_QUALITY.?$

A. 0.127
B. 0.137
C. 0.147
D. 0.157
Answer» E.
Discussion
11.

Determine the specific volume of R-134a at 1 MPa and 50°C, using ideal gas equation of state.$#

A. 0.022325 m<sup>3</sup>/kg
B. 0.024325 m<sup>3</sup>/kg
C. 0.025325 m<sup>3</sup>/kg
D. 0.026325 m<sup>3</sup>/kg
Answer» C. 0.025325 m<sup>3</sup>/kg
Discussion
12.

An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the temperature?

A. -10.60°C
B. -13.60°C
C. -15.60°C
D. -19.60°C
Answer» D. -19.60¬¨¬®‚Äö√†√ªC
Discussion
13.

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.#

A. 1.73 m<sup>3</sup>
B. 2.73 m<sup>3</sup>
C. 3.73 m<sup>3</sup>
D. 4.73 m<sup>3</sup>
Answer» E.
Discussion
14.

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the pressure in the tank.$

A. 60.183 kPa
B. 70.183 kPa
C. 80.183 kPa
D. 90.183 kPa
Answer» C. 80.183 kPa
Discussion
15.

A piston –cylinder device contains 0.06m3 of saturated water vapour at 350 kPa pressure. Determine the temperature and mass of the vapour inside the cylinder.$

A. 0.104 kg
B. 0.124 kg
C. 0.134 kg
D. 0.114 kg
Answer» E.
Discussion
16.

A rigid tank contains 50 kg of saturated liquid water at 90°C. Determine the pressure in the tank and the volume of the tank.$

A. 0.0518 m<sup>3</sup>
B. 0.0618 m<sup>3</sup>
C. 0.0718 m<sup>3</sup>
D. 0.0818 m<sup>3</sup>
Answer» B. 0.0618 m<sup>3</sup>
Discussion
17.

Above the critical point, the isotherms are continuous curves.

A. true
B. false
Answer» B. false
Discussion
18.

At critical point, value of Vg-Vf is

A. two
B. one
C. zero
D. infinity
Answer» D. infinity
Discussion
19.

Which of the following represents the specific volume during phase transition.

A. Vf-Vg
B. Vg-Vf
C. Vf+Vg
D. none of the mentioned
Answer» C. Vf+Vg
Discussion