1) One example of string instrument is a. piano b. drum c. saxophone d. trombone
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2) The speed of sound in glass is a. 2000 m/s b. 6000 m/s c. 10000 m/s d. 14000 m/s
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3) The microphone changes the sound waves into a. mechanical signals b. electrical signals c. light signals d. wave signals
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4) Sounds are chiefly produced by a. friction b. energy c. vibration d. disturbance
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5) The distance between two points of a wave in a phase is known as a. wave front b. frequency c. amplitude d. wavelength
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6) The term "vibration" has been derived from Latin word a. loqui b. vibrationem c. silentium d. biennium
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7) Repetition of sound in empty hall is known as a. echo b. harsh echo c. hollow echo d. soft echo
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8) String instruments produce sound when a. string is pushed b. string is pulled c. string is banged d. string lift up
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9) The sequence of notes is known as a. plain b. scale c. balance d. proportion
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10) Long exposure to sounds is dangerous for a. ears b. brain c. nerves d. eyes
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11) Tiny lumps of solid matter grew in kidney are known as a. kidney larva b. kidney stone c. kidney salts d. urea stone
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12) A device for viewing oscillations by a display on the screen of a cathode ray tube is called a. telescope b. microscope c. oscilloscope d. stethoscope
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13) Sound is carried to our ears through a. pressure b. vibrations c. temperature effect d. humidity effect
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14) Light travels a. slow than sound b. fast than sound c. at the same speed as of sound d. at different speed as of sound
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15) One of the three things that affects the sound produced by vibration of string is a. weight of string b. length of string c. distance between two strings d. material of string
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16) Sound travels more fast in a. air b. liquids c. solids d. all of above
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17) Sound cannot travel in vacuum because a. there is no pressure in vacuum b. there is no air in vacuum c. there is no humidity in vacuum d. there are no particle in vacuum
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18) Sound created by musical instruments is amplified by a. increasing string vibration b. decreasing string vibration c. wooden sound box d. metallic sound box
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19) The length of air cutting is changed by a. valves b. fingers c. valves and fingers d. hands
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20) An example of stringed instruments is a. guitar b. saxophone c. drum d. flute
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