Q221
Open questionWhich is best used as a sound absorbing material in partition walls ?
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Q222
Open questionSpeed of sound is the greatest in :
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Q223
Open questionThe pitch of sound depends on its
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Q224
Open questionWhat apparatus is used to locate a submerged object?
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Q225
Open questionA decibel is
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Q226
Open questionSound following a flash of lightning is called
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Q227
Open questionAcceptable noise level for human ear
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Q228
Open questionDecibel is a term connected with :
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Q229
Open questionDecibel is the unit used for
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Q230
Open questionThe speed of sound in air depends on
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Q231
Open questionThe unit of noise pollution (level) is :
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Q232
Open questionThe speed of sound travel fastest through
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Q233
Open questionCompressions and Rarefactions are characteristic of
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Q234
Open questionLeast audible sound for most of the human ear is :
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Q235
Open questionHertz is a unit for measuring
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Q236
Open questionHertz is the SI unit of
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Q237
Open questionThe velocity of the sound is highest in
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Q238
Open questionThe ordinary and maximum tolerance limit of sound by human being is
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Q239
Open questionIn SONAR which kind of wave is used?
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Q240
Open questionSound waves cannot travel through
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