Quiz-summary
0 of 15 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
Information
Air Conditioning Quiz Questions Answers 2
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 15 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
| Average score |
|
| Your score |
|
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- Answered
- Review
-
Question 1 of 15
1. Question
1 pointsAs the head increases, the fan will need ______ horsepower to deliver the required quantity of air against the system head or pressure:
Correct
Head is the amount of pressure that the fan must overcome to move air through the ductwork. The higher the head, the more power the fan needs to produce. Horsepower of the fan depends on the quantity of air it has to move, the head required (the pressure) that the fan must overcome to move the air and efficiency of fan
Incorrect
Head is the amount of pressure that the fan must overcome to move air through the ductwork. The higher the head, the more power the fan needs to produce. Horsepower of the fan depends on the quantity of air it has to move, the head required (the pressure) that the fan must overcome to move the air and efficiency of fan
-
Question 2 of 15
2. Question
1 pointsWhen the velocity of the air in the duct reduces, the resulting velocity pressure difference gets converted to ______ pressure:
Correct
When the velocity of air decreases, the velocity pressure decreases. The static pressure, which is the pressure exerted by the air regardless of its velocity, increases to compensate for the loss of velocity pressure.
Incorrect
When the velocity of air decreases, the velocity pressure decreases. The static pressure, which is the pressure exerted by the air regardless of its velocity, increases to compensate for the loss of velocity pressure.
-
Question 3 of 15
3. Question
1 pointsAir velocity in the ducts must be kept reasonably ________ to minimize the frictional losses:
Correct
By keeping air velocity low and using smooth ductwork and insulation, frictional losses in ductwork can be minimized and improve the efficiency of the HVAC system
Incorrect
By keeping air velocity low and using smooth ductwork and insulation, frictional losses in ductwork can be minimized and improve the efficiency of the HVAC system
-
Question 4 of 15
4. Question
1 pointsWater vapor in the air creates its own vapor pressure
Correct
Vapor pressure is the pressure exerted by the water vapor molecules in the air.
Incorrect
Vapor pressure is the pressure exerted by the water vapor molecules in the air.
-
Question 5 of 15
5. Question
1 points_______ Depression is a measure of the humidity of the air
Correct
The difference between the dry bulb and wet bulb temperatures is called the wet bulb depression. The wet bulb depression is a measure of the humidity of the air. The higher the wet bulb depression, the more humid the air is.
Incorrect
The difference between the dry bulb and wet bulb temperatures is called the wet bulb depression. The wet bulb depression is a measure of the humidity of the air. The higher the wet bulb depression, the more humid the air is.
-
Question 6 of 15
6. Question
1 pointsOn a dry winter day, the air tends to feel ____ than on a humid winter day
Correct
When the air is humid, it contains a higher amount of water vapor. Water vapor has the ability to trap and retain heat. So, in a humid environment, the water vapor molecules absorb and hold onto the heat, making the air feel warmer. Therefore, in contrast, dry winter air tends to feel colder.
Incorrect
When the air is humid, it contains a higher amount of water vapor. Water vapor has the ability to trap and retain heat. So, in a humid environment, the water vapor molecules absorb and hold onto the heat, making the air feel warmer. Therefore, in contrast, dry winter air tends to feel colder.
-
Question 7 of 15
7. Question
1 pointsWarmer air has a lower capacity for holding moisture
Correct
Warmer air molecules have more energy and move more quickly, creating a greater space between them. This increased space allows for more water vapor molecules to exist in the air.
Incorrect
Warmer air molecules have more energy and move more quickly, creating a greater space between them. This increased space allows for more water vapor molecules to exist in the air.
-
Question 8 of 15
8. Question
1 pointsRemoval of _____ lowers the air temperature
Correct
When sensible heat is removed from the air, the temperature of the air decreases. This can be achieved by evaporative cooling and air conditioning.
Incorrect
When sensible heat is removed from the air, the temperature of the air decreases. This can be achieved by evaporative cooling and air conditioning.
-
Question 9 of 15
9. Question
1 pointsRefrigerated air–conditioning will ____:
Correct
A refrigerated air-conditioning system cools the room by removing the heat by absorbing it using refrigerant and also removes humidity from the air by cooling the water vapor in the air causing it to condense into liquid water.
Incorrect
A refrigerated air-conditioning system cools the room by removing the heat by absorbing it using refrigerant and also removes humidity from the air by cooling the water vapor in the air causing it to condense into liquid water.
-
Question 10 of 15
10. Question
1 pointsThe relative humidity of the air _____ as the temperature increases
Correct
The relative humidity of the air decreases as the temperature increases. This is because warm air can hold more water vapor than cold air.
Incorrect
The relative humidity of the air decreases as the temperature increases. This is because warm air can hold more water vapor than cold air.
-
Question 11 of 15
11. Question
1 pointsThe actual amount of water vapor that is contained in an air sample is expressed as:
Correct
Incorrect
-
Question 12 of 15
12. Question
1 pointsWhich of the following law of partial pressures states – “the total pressure of a gas mixture is the sum of the pressures of each gas in the mixture”
Correct
Incorrect
-
Question 13 of 15
13. Question
1 points____ temperature is the sensible–heat level of air and is taken with an ordinary thermometer
Correct
Sensible heat is the heat that is transferred to or from an object without changing its phase. Dry bulb temperature is used to measure the sensible heat of the air. It does not take into account the humidity of the air.
Incorrect
Sensible heat is the heat that is transferred to or from an object without changing its phase. Dry bulb temperature is used to measure the sensible heat of the air. It does not take into account the humidity of the air.
-
Question 14 of 15
14. Question
1 pointsWhich of the following Duct shape has highest efficiency
Correct
Round ducts have the highest efficiency because they have the least amount of surface area, which means that less heat is lost through the ductwork.
Incorrect
Round ducts have the highest efficiency because they have the least amount of surface area, which means that less heat is lost through the ductwork.
-
Question 15 of 15
15. Question
1 pointsAir conditioners can be used to remove which of the following:
Correct
Incorrect