Steam Boilers Engines Nozzles And Turbines(Engineering > Mechanical Engineering ) Questions and answers for exam Preparation

Question 1. O₂ content in atmospheric air on volume basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option A. -> 21 %

Question 2. O₂ content in atmospheric air on weight basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option B. -> 23 %

Question 3. O₂ content in atmospheric air on weight basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option B. -> 23 %

Question 4. O₂ content in atmospheric air on volume basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option A. -> 21 %

Question 5. The three "ts" for good combustion are

Temperature, time, and turbulence
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature
Total air, time, and temperature

Explanation:-

Answer: Option A. -> Temperature, time, and turbulence

Question 6. Willian’s line follows the law (where b = a constant representing the shape of the willian’s line, a = another constant i.e. no load consumption per hour, i.p. = indicated power, and m = steam consumption per hour)

I.P. = a × m + b
m = a + b × I.P.
I.P. = b × m + a
m = (b/I.P.) - a

Explanation:-

Answer: Option B. -> m = a + b × I.P.

Question 7. O₂ content in atmospheric air on weight basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option B. -> 23 %

Question 8. O₂ content in atmospheric air on volume basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option A. -> 21 %

Question 9. O₂ content in atmospheric air on weight basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option B. -> 23 %

Question 10. O₂ content in atmospheric air on volume basis is

21 %
23 %
30 %
40 %

Explanation:-

Answer: Option A. -> 21 %