This document appears to be a transcript of questions and answers from an ACREX 2012 Quiz event organized by ISHRAE in Bangalore, India. It includes audience questions on topics like the scientists who discovered the effect of CFCs on the ozone layer, innovative technologies from the past 80 years according to a 2004 poll, the emissions equivalent of refrigerant leakage, temperature difference curves, an Indian company acquired by Hitachi, magnetic refrigeration materials, motor types used in expansion valves, promising renewable energy sources for AC, ducting component abbreviations, factors affecting duct pressure drop, duct connectors, and variable air volume components for central AC systems. Mohan Reddy provided answers to each question.

1. F o r Pat i e n t Au d i e n c e
@
ACREX 2 01 2 Qu i z ,
Ban g al o r e
Or g an i s e d b y I S HRAE
- Mo h an Re d d y

2. Audience Question
1. Name the scientists who received Nobel prize for
finding Chlorine element released by halogenated
hydrocarbons was adversely affecting Ozone layer?

3. Answer
F S Rowland & M J Moulina

4. Audience Question
In 2004 as per Henry Ford Poll conducted in US, which
was the top of top 10 innovative ideas of last eighty
years?

5. Answer
• Airconditioning
• Pencillin
• The Personal Computer
• Global Positioning Satellites
• Cell phones
• Broadcast Televisions
• Social Security Act
• The Internet
• Frozen Food
• The Polio Vaccine

6. Audience Question
How many Kilometers a 2 lt engine car has to travel to
have emissions equivalent to 1 kg R404A refrigerant
leakage?
A) 3km
B) 100km
C) 1 Million Km
D) 30,000 Km

7. Answer
Answer: 30,000 Km . GWP of R404A is 3800

8. Audience Question
What is LMTD?

9. Answer
Logarthmic mean temperature difference

10. Audience Question
What is the difference between these 2 curves

11. Answer
Left is Natural scale PH curve
Right is logarthmic scale PH Curve

12. Audience Question
Name the company started by Lal Bhai and
later acquired by leading Japanese group?

13. Answer
Amtrex acquired by Hitachi

14. Audience Question
Material used in Magnetic refrigeration?

15. Answer
GADOLINIUM

16. Audience Question
Oil free bearing works on principle of

17. Answer
Magnetic levitation

18. Audience Question
What type of motor used in electronic
expansion valve

19. Answer
Stepper motor

20. Audience Question
Which is most promising renewable energy
source for airconditioning?

21. Answer
Geothermal

22. Audience Question
Abbreviate DIDW of fans

23. Answer
Double inlet double width

24. Audience Question
In which type of ducting pressure drop is
lower?

25. Answer
Spiral

26. Audience Question
What is used to connect diffuser and duct?

27. Answer
Flexible duct

28. Audience Question
What component is used to have individual
control of air volume in central air
conditioning systems?

29. Answer
VAV