Solved Important 16 marks Long Questions

SOLVED QUESTIONS

1. Explain the phase transformation that takes place when ice (solid) is heated continuously till superheated steam is obtained: Name the different states involved. Sketch the transformation on a 'temperature' vs 'heat added' diagram.

Refer chapter 4.2 on Page 4.2.

2. Define the following terms pertaining to pure substances like water:

(i) Sensible heating

(ii) Latent heating

(iii) Saturation states

(iv) Saturation pressure

(v) Saturation temperature

(vi) Triple point

(vii) Dryness fraction

(viii) Superheated steam and degree of superheat.

Refer chapter 4.2 on Page 4.2.

3. Explain phase rule.

Refer chapter 4.2.3 on Page 4.5.

4. Draw p-v diagram of pure substances and explain various regions of the diagram in detail.

Refer chapter 4.3 on Page 4.5.

5. When will you call a vapour superheated? Give an example. Also when will you call a liquid as compressed liquid? Give examples. 

Refer Pages 4.6 & 4.7.

6. Draw p-T diagram of a pure substance and label all the phases and phase changes.

Refer chapter 4.4 on Page 4.8.

7. Draw T-v diagram of pure substances and explain various regions of the diagram in detail.

Refer chapter 4.5 on Page 4.8.

8. Briefly explain the process of super-heated steam formation with the help of T-s diagram. 

Refer chapter 4.6 on Page 4.9.

9. Draw the p-v-T surface for a normal substance and explain the formation of the superheated steam from ice at constant pressure. 

Refer chapter 4.8 on Page 4.11 for p-v-T surface and refer chapter 4.6 on Page 4.9 for formation of the superheated steam from ice.

10. What are the uses of Steam table and explain.

Refer chapter 4.9 on Page 4.12.