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11. Which of the following instrument is used to measure force and velocity of wind and directions?
  A.  Anemometer
  B.  Altimeter
  C.  Bolometer
  D.  Cathetometer
     
   
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12. Fathometer is used to measure:
  A.  Boililing poin of liquids
  B.  Sound under water
  C.  Level of humidity
  D.  Depth of the ocean
     
   
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13. Galvanometer is used to measure:
  A.  Pitch of sound
  B.  Electric current
  C.  Magnetic flux
  D.  Potential differnce in electric currents
     
   
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14. Manometer is used to measure:
  A.  Internal parts of body
  B.  Very high temperature
  C.  Pressure of gases
  D.  Blood pressure
     
   
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15. Which of the following instrument is used to compare the luminous intensity of the source of light
  A.  Periscope
  B.  Photometer
  C.  Kymograph
  D.  Udometer
     
   
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16. Hydrophone is used to measure :
  A.  Sound under water
  B.  Change in atomospheric humidity
  C.  Boiling points of liquid
  D.  Viscosity of liquid
     
   
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17. Micrometer is used to:
  A.  Electric Current
  B.  Density of light
  C.  View objects above sea levels
  D.  Electrical power
     
   
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18. What is used to measure the scattering of light by particles suspended in a liquid?
  A.  Cryometer
  B.  Machmeter
  C.  Nephetometer
  D.  Ohmmeter
     
   
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19. Polygraph is used to:
  A.  Record changes in hearbeat, BP and respiration; in lie detection
  B.  Measures altitudes and angles in navigation and astronomy
  C.  Measure the wavelength of a radiowave
  D.  Trace movements of the heartbeats
     
   
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20. Pyrometer is used to:
  A.  Detect object under water
  B.  Measure the speed of an aircraft
  C.  Measure the boiling point of liquid
  D.  Measure very high temperature
     
   
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