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1) As compare to air, sound travels faster in a. liquids b. gases c. vacuum d. fluids
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2) Sounds of vehicles, aircrafts and machines are called a. artificial sounds b. natural sounds c. noise d. normal sounds
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3) Large empty room often sounds a. full b. hollow c. noisy d. repeating
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4) For communication astronauts use radio because a. sound travels at very high speed in vacuum b. sound does not travel in vacuum c. vacuum repels sounds d. sound energy turns into light in vacuum
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5) In concert halls, soft materials and carpets are used to a. increase sound waves b. absorb sound waves c. retract sound waves d. refract sound waves
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6) The pitch of the note depends upon the a. tension on string b. diameter of wind hole c. tension on drum surface d. diameter of drum surface
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7) The caliber of instrumental note depends on the a. depth of drum b. string length c. length of wind holes d. radius of wind holes
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8) One of the vibrations of the string makes a. pitch of the instrument b. pitch of the note c. scale of the note d. pitch of the scale
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9) Sound waves are converted by a. speakers b. computers c. microphones d. monitors
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10) Sound is measured by units that are called a. Hertz (Hz) b. Decibels (dB) c. Meters (m) d. Pascal (Pa)
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11) Like light, sound cannot a. pass through transparent solids b. pass through air c. pass through liquids d. pass through vacuum
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12) A drum makes sound of a. high frequency b. low amplitude c. high pitch d. low pitch
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13) An example of longitudinal wave is a. slinky spring b. light c. energy d. water wave
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14) 20 dB has hundred times more energy than a. 10 dB b. 0 dB c. 5 dB d. 2 dB
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15) 'Eardrum' bursts at a. 40 dB b. 80 dB c. 160 dB d. 320 dB
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16) 'Ultrasound' is a reflection of a. soft tissues only b. hard tissues only c. both soft and hard tissues d. hard muscles only
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17) Three main types of musical instruments are a. guitar, violin and piano b. drum, guitar and piano c. stringed instrument, wind instrument and percussion instrument d. stringed instrument, wind instrument and beat n bass instrument
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18) Sound loses more energy in a. air b. vacuum c. liquid d. solid
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19) The note also depends on a. diameter of the drum b. thickness of string c. tension of string d. distance of wind holes
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20) The level of sound of normal conversation is a. 10 dB b. 20 dB c. 50 dB d. 60 dB
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