**Welcome to another round of Questions of The Week !
Questions of the week:
Introduction and requirements:
A member of the Award Committee will post a question, at a random day/time.
A competing member may make one post per question thread to answer the questions and the member’s winning entry must have all parts of the questions answered completely in that one post. Editing your one answer post allowed will result in disqualification.
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Any disregard to the above and divulging the correct answers will forfeit the weekly winnings.
So please refrain from participating if you have already won in the maximum for the Year.
First correct answer (as judged by the Awards Committee or Poster of the Question) wins.
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Allow 2 weeks for delivery.
**THANKS for playing and good luck! **
This week’s questions relate to infrared theory and its practical effect on infrared thermography. The “focus” today is on emissivity.
Thermal emittance or thermal emissivity is the measure of how well an object radiates infrared energy compared to a standard black body. It’s an important consideration in many infrared thermography applications.
- A solid object that is opaque to infrared radiation and is a good reflector of infrared radiation will be a _____ emitter of infrared radiation.
C. unpredictable based on information provided… (explain)
- Ordinary glass is opaque to infrared radiation.
It depends… (explain)
- The emissivity of an object may be affected by (identify all that are FALSE).
A. the surface smoothness of the object
B. the shape of the object
C. the angle at which the object is viewed
D. the temperature of the object
E. the color of the object
F. the IR wavelength
- If you plug the appropriate emissivity of an object into your infrared imager, it will give you an accurate representation of the actual temperature of that object.
- Decreasing the emittance value of your imager will cause the observed temperature to go ____
It depends… (explain)
Bonus question (the prize is bragging rights): How do Low-E windows for hot climates differ from Low-E windows for cold climates and why?