1. In SONAR, we use
(A) Radio waves
(B) Audible sound waves
(C) Ultrasonic waves
(D) Infrasonic waves
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2. The apparatus used to measure intensity of sound is
(A) Chronometer
(B) Anemeter
(C) Audiophone
(D) Audiometer
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3. Which one of the following instrument is used for locating submerged objects in an ocean?
(A) Audiometer
(B) Galvanometer
(C) Sextant
(D) SONAR
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4. SONAR is mostly used by
(A) Astronauts
(B) Doctors
(C) Engineers
(D) Navigators
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5. Which of the following is measured by ‘Anemometer’?
(A) Velocity of water-flow
(B) Depth of water
(C) Force of the wind
(D) Intensity of light
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6. The velocity of wind is measured by
(A) Barometer
(B) Anemometer
(C) Hydrometer
(D) Wind Vane
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7. Which one of the following is not correctly matched?
(A) Anemometer – Wind speed
(B) Ammeter – Electric current
(C) Tacheometer – Pressure difference
(D) Pyrometer – High temp.
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8. Pyrometer is used to measure
(A) Air pressure
(B) Humidity
(C) High temperature
(D) Density
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9. Which one of the following devices is used to measure extremely high temperature?
(A) Pyrometer
(B) Photometer
(C) Phonometer
(D) Pycnometer
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10. Which one of the following thermometers is known as pyrometer?
(A) Thermo-electric thermometers
(B) Radiation thermometers
(C) Gas thermometers
(D) Liquid thermometers
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