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NDA GK Previous Papers Chapterwise MCQs - Thermodynamics
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NDA GK Previous Papers Chapterwise MCQs - Thermodynamics
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25 Questions

1. Thermometer A and B have ice points marked at 15° and 25° and steam points at 75° and 125° respectively. When thermometer A measures the temperature of a bath as 60°, the reading of B for the same bath is
2. A bucket full of water is kept in a room and it cools from 75°C to 70°C in time T1 minutes, from 70°C to 65°C in timeT2 minutes, and from 65°C to 60°C in time T3 minutes, then
3. Which zone of a candle flame is the hottest ?
4. Which of the following statements about latent heat for a given substance is/are correct?
1. It is fixed at a given temperature.
2. It depends upon the temperature and volume.
3. it is independent of temperature and volume.
4. It depends on the temperature but independent of volume. Select the correct answer using the code given below:
5. Which of the following properties are most desirable for a cooking pot ?
6. A pressure cooker works on the principle of
7. A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. What would be the corresponding reading in a Celsius thermometer?
8. The absolute, zero temperature is 0 Kelvin. In °C unit, which one of the following is the absolute zero temperature?
9. Fahrenheit and Celsius are the two scales used for measuring temperature. If the numerical value of a temperature recorded in both the scales is found to be same, what is the temperature?
10. The absolute zero, i.e., temperature below which is not achievable, is about:
11. When a solid is heated, it turns directly into a gas. This process is called
12. Which one of the following statements is correct?
13. Thermal capacity of a body depends on the
14. The formula for conversion between Fahrenheit and Celsius is °F = X + (1.8 × °C) What is factor X ?
15. Two equal amounts of water are mixed by gently pouring both into an insulated cup. One part is initially at 90°C, and the other part is initially at Ti °C. If the final temperature of the mixture is 131°C, what is the value of T ?
16. In a pressure cooker, cooking is faster because the increases in vapour pressure
17. Which one among the following denotes the smallest temperature?
18. Which one of the following statements is not correct?
19. Which one among the following statements about thermal conductivity is correct ?
20. Which one of the following statements is not correct?
21. Which one of the following statements with regard to expansion of materials due to heating is not correct?
22. A solid is melted (above the melting point) and allowed to cool down at normal condition.Its variation of temperature as a function of times is as shown in the figure given below. What is the reason for the plateau(flat position) in the central region of the cooling curve as shown in the figure?
23. For a steel boat floating on a lake, the weight of the water displaced by the boat is
24. 1 gm of ice at 0°C is mixed with 1 gm of steam at 100°C. After thermal equilibrium, the temperature of the mixture is
25. When water is heated from 0°C to 20°C, how does its volume change ?

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