Question
The following instrument is used to measure which of the following?
| A. |
Cooling power of air
|
| B. |
Radiant heat
|
| C. |
Humidity
|
| D. |
Temperature
|
Show Answer
|
Correct Answer » A
Explanation
|
|
- The instrument shown is a Kata thermometer.
- A Kata thermometer is a special alcohol thermometer used to measure:
- Cooling power of air
- Low air velocities
- Combined effects of:
- Air temperature
- Humidity
- Air movement
- It works by measuring the time taken for the thermometer to cool between two fixed temperatures.
Why Other Options are Incorrect
B. Radiant heat
- Radiant heat is measured using instruments like globe thermometer.
C. Humidity
- Humidity is measured using hygrometers or psychrometers.
D. Temperature
- Ordinary thermometers measure temperature.
- Kata thermometer specifically measures cooling power of air, not simply ambient temperature.
