Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part2 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is |
| 40% |
| 25% |
| 50% |
| 80% |
| 90%. |
7.Hygrometery deals with the |
| Hygroscopic substances |
| water vapour in air |
| temperature of air |
| pressure of air |
| density measurement. |
8.Latent heat of dry steam at atmospneric pressure is equal to |
| 539 kcal/kg |
| 539 BTU/lb |
| 427 kcal/kg |
| 100 kcal/kg |
| 471 kcal/kg. |
9.While steam expands in turbines, theoretically the entropy |
| remains constant |
| increases |
| decreases |
| behaves unpredictably |
| none of the above. |
10.The pressure at which latent heat of vaporisation of water is zero, is |
| below atmospheric pressure |
| 1 kg/cm2 |
| 100 kg/cm2 |
| 170 kg/cm2 |
| 225.6 kg/cm2. |
More Steam Boilers QUESTIONS AND ANSWERS available in next pages
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