Biju Patnaik University of Technology 2008-4th Sem B.Arch Architecture Building Services-II - Question Paper
Total number of printed pages - 4
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B. Arch PCAR 8207
Fourth Semester Examination - 2008 BUILDING SERVICES-II Full Marks - 70  Time : 3 Hours Answer Question No. 1 which is compulsory and any five from the rest. The figures in the right-hand margin indicate marks. Total number of printed pages - 4
3. Discuss how a residential building needs to be planned against outdoor and indoor noise. 10 4. A banquet hall 20mt x 8mt x 4.5 mt has sound absorption coefficients 0.20 for walls, 0.06 for ceiling and 0.10 for floor. All coefficients are at 500 Hz. Find Reverberation time T at 500 Hz at this space with no occupants and no sound absorbing treatments. Find the reverberation time T if 50 percent of the ceiling surface is treated with acoustic panel and floor is treated with carpet. The coefficients of acoustic panel and carpets are 0.85 and 0.63 respectively at 500 Hz. 10 5. (a) Discuss the effect of adding sound absorb ing treatment to rooms. 5 (b) Discuss the check list for effective absorption of sound. 5 6. A car horn outdoors produces a sound intensity level of 90 dB at 10 ft away. Find the intensity level at a location 90 ft. away. 10 7. Distinguish between: 2.5x4 (a) Pure Tone and Complex Sounds. (b) Air borne sound and Structure Borne Sound. (c) Sound Intensity and Sound Intensity level. (d) Free field and Reverberant field. 8. (a) Discuss the impact of application of Sound- absorbing materials to rooms. 5 (b) Write a short note on Accoustical Blankets. 5 PCAR 8207 4 -C
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 Biju Patnaik University of Technology 2008-4th Sem B.Arch Architecture Building Services-II - Question Paper
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