Building Utilities Exam Questions with Complete Solutions

Sound - Answer-"Is a physical wave, a mechanical vibration, a series of pressure variations, in an elastic medium " 20 to 20000 HZ - Answer-A healthy pair of human ear has a detection range of. 344 m/ sec. - Answer-Sound travels in air, at sea level, in ____ m/sec. Frequency - Answer-"The number of times the cycle of compression and rarefaction of air makes in a given unit of time. " Reverberation - Answer-"Is the persistence of sound after the cause of sound has stopped-a result of repeated reflections. " Echo - Answer-"Is caused when reflected sound at sufficient intensity reaches a listener approximately 70 m/ sec. after hear the direct sound. " Flutter - Answer-"Is perceived as a buzzing or clicking sound, and it is comprised of repeated echoes traversing back and forth between two non-absorbing parallel surfaces. " Fibrous Materials - Answer-A device used for sound absorption Creep - Answer-This describe the reflection of sound along a curved surface near the surface 344 m/sec - Answer-Sound travels only about ___________m/sec. decibel - Answer-It is the measurement of the intensity of sound. 40 db - Answer-It is the limit for comfortable hearing. Reverberation time - Answer-"It is the time in seconds that a reflected sound diminishes for the case by 60db after the original sound has stopped." omnidirectional mic - Answer-"It is a type of microphone which equally sensitive