Mechanical Engineering Exam > Mechanical Engineering Questions > If moist air is cooled by sensible heat remov...
Start Learning for Free
If moist air is cooled by sensible heat removal, which of the following is true?
- a)Neither rela tive hu midity nor spec ific humidity changes
- b)Specific humidity changes but not relative humidity
- c)Both relative humidity and specific humidity change
- d)None of these
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
If moist air is cooled by sensible heat removal, which of the followin...
Sensible cooling process
Most Upvoted Answer
If moist air is cooled by sensible heat removal, which of the followin...
When moist air is cooled by sensible heat removal, both the relative humidity and specific humidity change.
Explanation:
Sensible heat removal refers to the process of cooling air without changing its moisture content. When moist air is cooled, it reaches a point where the temperature drops below its dew point. At this point, the air becomes saturated and condensation occurs, leading to the formation of liquid water droplets or frost.
Relative humidity is the ratio of the amount of moisture present in the air to the maximum amount of moisture the air can hold at a given temperature. As the air is cooled, its capacity to hold moisture decreases, while the actual amount of moisture remains constant. Therefore, the relative humidity increases. This means that the air becomes closer to saturation, as the relative humidity approaches 100%.
Specific humidity, on the other hand, is the actual amount of moisture present in the air per unit mass of dry air. As the air is cooled, the specific humidity remains constant because the amount of moisture in the air does not change. However, since the mass of dry air decreases due to cooling, the specific humidity increases. This means that the air becomes more saturated with moisture.
Therefore, when moist air is cooled by sensible heat removal:
- The relative humidity increases because the air becomes closer to saturation.
- The specific humidity increases because the mass of dry air decreases.
None of the given options accurately describe the changes in both relative humidity and specific humidity when moist air is cooled by sensible heat removal. Thus, the correct answer is option D) None of these.
Explanation:
Sensible heat removal refers to the process of cooling air without changing its moisture content. When moist air is cooled, it reaches a point where the temperature drops below its dew point. At this point, the air becomes saturated and condensation occurs, leading to the formation of liquid water droplets or frost.
Relative humidity is the ratio of the amount of moisture present in the air to the maximum amount of moisture the air can hold at a given temperature. As the air is cooled, its capacity to hold moisture decreases, while the actual amount of moisture remains constant. Therefore, the relative humidity increases. This means that the air becomes closer to saturation, as the relative humidity approaches 100%.
Specific humidity, on the other hand, is the actual amount of moisture present in the air per unit mass of dry air. As the air is cooled, the specific humidity remains constant because the amount of moisture in the air does not change. However, since the mass of dry air decreases due to cooling, the specific humidity increases. This means that the air becomes more saturated with moisture.
Therefore, when moist air is cooled by sensible heat removal:
- The relative humidity increases because the air becomes closer to saturation.
- The specific humidity increases because the mass of dry air decreases.
None of the given options accurately describe the changes in both relative humidity and specific humidity when moist air is cooled by sensible heat removal. Thus, the correct answer is option D) None of these.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Top Courses for Mechanical EngineeringView all
If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer?
Question Description
If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer?.
If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer?.
Solutions for If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice If moist air is cooled by sensible heat removal, which of the following is true?a)Neither rela tive hu midity nor spec ific humidity changesb)Specific humidity changes but not relative humidityc)Both relative humidity and specific humidity changed)None of theseCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup