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Thermodynamics Practice Test: Basic Temperature Concepts
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In thermodynamics, temperature is a measure of an object's average total internal energy. This includes kinetic energy and other factors.  The thermodynamic temperature of a substance is directly proportional to the average kinetic energy of translational motion. The Boltzmann constant relates the thermodynamic temperature of a gas to the mean kinetic energy of an individual particle.  Temperature is also related to thermal equilibrium. Thermal equilibrium occurs when two bodies are in contact and can exchange energy. Systems are in thermal equilibrium when they have the same... Show more
Thermodynamics Practice Test: Basic Temperature Concepts
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25 Questions

1. A large exhaust fan in a lab room keeps the pressure inside at 10 cm water relative vacuum to the hallway? What is the net force acting on the door measuring 1.9 m by 1.1 m?
2. All gases and vapours approach ideal gas behaviour at?
3. What is the standard fixed point of thermometry?
4. Which of the following were used as fixed points before 1954?
5. Celsius temperature of the triple point of water is ( in degree Celsius)?
6. The value of ratio of the steam point temperature to the ice point temperature is?
7. A 5m^3 container is filled with 840 kg of granite (density is 2400 kg/m^3) and the rest of the volume is air (density is 1.15 kg/m^3). Find the mass of air present in the container.
8. The temperature interval from the oxygen point to the gold point is divided into how many parts?
9. A 100 m tall building receives superheated steam at 200 kPa at ground and leaves saturated vapour from the top at 125 kPa by losing 110 kJ/kg of heat. What should be the minimum inlet temperature at the ground of the building so that no steam will condense inside the pipe at steady state?
10. A piston/cylinder with a cross-sectional area of 0.01 m^2 is resting on the stops. With an outside pressure of 100 kPa, what should be the water pressure to lift the piston?
11. When a body A is in thermal equilibrium with a body B, and also separately with a body C, then B and C will be in thermal equilibrium with each other.
12. A system undergoing change in state from A to B along path ‘X’ receives 100 J heat and does 40 J work. It returns to state A from B along path ‘Y’ with work input of 30 J. Calculate the heat transfer involved along the path ‘Y’.
13. A real gas behaves as an ideal gas when?
14. A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the final temperature.
15. Which of the following is chosen as the standard thermometric substance?
16. One kg of diatomic Oxygen is present in a 500 L tank. Find the specific volume on both mass and mole basis.
17. A 5 m long vertical tube having cross sectional area 200 cm^2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. How much water is present in tube?
18. A sealed rigid vessel has volume of 1 m3 and contains 2 kg of water at 100°C. The vessel is now heated. If a safety pressure valve is installed, at what pressure should the valve be set to have a maximum temperature of 200°C ?
19. Calculate the change in enthalpy of carbon dioxide from 30 to 1500°C at 100 kPa at constant specific heat.
20. Find the pressure of water at 200°C and having specific volume of 1.5 m3/kg.
21. A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine work done by the air.
22. Find the change in u for carbon dioxide between 600 K and 1200 K for a constant Cv0 value.
23. A 5 m long vertical tube having cross sectional area 200 cm2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. What is the pressure at the bottom of tube?
24. The pressure gauge on an air tank shows 60 kPa when the diver is 8 m down in the ocean. At what depth will the gauge pressure be zero?
25. Optical method is adopted for measuring temperatures higher than the gold point?

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