General Knowledge

GENERAL KNOWLEDGE OF SCIENTIFIC INSTRUMENTS in FPSC PPSC NTS Test

GENERAL KNOWLEDGE OF SCIENTIFIC INSTRUMENTS Repeated questions in FPSC PPSC NTS



Hydrometer measures humidity.

Barometer measures atmospheric pressure. Purity of milk is measured by lactometer.

Fathometer measures the depth of oceans.

Sextant is used for measuring altitude of Sun and other heavenly bodies.

Chronometer records accurate time on ships.

Algesimeter indicates the degree of sensitiveness of skin.

Altimeter measures altitudes.

Ammeter measures current.

Anemometer records velocity of wind.

Cyamometer measures blueness of sky or ocean.

Dasymeter measures density of gas.

Galvanometer measures small electric current.

Hydrometer measures relative density of liquids.

Hygrometer measures humidity in atmosphere.

Hypsometer measures atmospheric pressure to ascertain elevations by determining boiling point of liquid. Or Hypsometer is an instrument for measuring the height above sea level.

Manometer measures pressure of gases.

Micrometer measures minute distances

• Periscope is used for viewing objects above eye level.

Cyclotron is used for electromagnetic acceleration of charged atoms

• Geiger counter is used for detecting and recording radioactivity. It was invented by Hans Geiger (1882-1945)

Pyrometer measures high temperatures.

Refrectometer measures refractive index of a substance.

Seismograph measures intensity of earthquake.

Telstar transmits wireless or T.V broadcast.

Viscometer measures viscosity of liquids.

Spiro graph records the movement of lungs.

Photometer measures rate of transpiration.

Scotograph is used for enbling blind to write.

Eratosthenes measures distance round the earth.

Kaldio-scopes have proved helpful in finding the amount of dampness in soil.

Mohr’s scale measures degree of hardness of minerals.

RBC and WBC is bloods are counted by Hemocytometer.

Manometer is the instrument of measuring gas pressure.

Spectrometer instrument for measuring the spectrum of light.


The variation in the blood flow can be heard with an instrument called _ stethoscope.

What is measured by an interferometer-Wavelength of light.

Hydrophone is used for measuring sound under water.

Magnometer is an instrument designed to compare the magnetic movement and field.

Potometer is used to measure the rate of respiration in animal and plants.

For measuring solar radiation we use pyrheliometer.

Actimometer measures direct heating power of the Sun.

Ammeter is use for measuring current strength.

Manometer is the instrument of measuring gas pressure.

Spectrometer instrument for measuring the spectrum of light.

The measurement of rainfall is made by an instrument known as rain gauge

What is measured with an ombrometer-Rainfall

The instrument used to measure very high temperature: Infrared pyrometers

Mechanical energy into electrical energy: Generator

Heat energy into mechanical energy: Heat engine or steam engine.

Electrical energy into mechanical energy: Electrical Motor

• Electrical energy into sound energy: Loudspeaker

Sound energy into electrical energy: Microphone

The device used to measure radioactivity: Geiger-Muller tube

• The device which converts the chemical energy into electrical energy: Battery

The device used to measure radioactivity. Geiger counter

Hygrometer is instrument used for measuring humidity of air.

Heliscope is used for viewing the sun.

What does a potometer measure- Water intake

Clinical thermometer usually measures in Fahrenheit.

Actimometer measures direct heating power of the Sun.

Ammeter is use for measuring current strength

Voltammeter is an electrolytic cell for conducting electrolytic dissociation of electrolyte.

What does a drosomoter measure: Dew

Relative density of an atmosphere is measured by hygrometer.

Spirograph is an apparatus used for recording the movement of the lungs.

The maximum limit of sound beyond which a person can become deaf is 129 lbs.

Charles K Rhodes developed an X-Ray emitting laser in 1990.

Son meter is an instrument used to study the behavior of vibrating string.

The instrument used for measuring the velocity of wind is known as anemometer.

Altimeter: an apparatus used in aircraft for measuring altitudes.

Ammeter: is used for to measure intensity of sound.

Anemometer: is an instrument for measuring the force and velocity of wind.

Audiometer: an instrument to measure intensity of sound.

Audiophone: is an instrument required for improving imperfect sense of hearing.

Barograph: for continuous recording of atmospheric pressure.

Barometer: is an apparatus used for measuring the atmospheric pressure.

Binoculars: is an instrument used for seeing distant objects, the rays of light are twice reflected by means of right-angled prisms.

Callipers: a compass with legs for measuring the inside or outside diameter of bodies.

Calorimeter: an instrument used for measuring quantities of heat.

Carburettor: is an apparatus for charging air with petrol vapours in an internal combustion engine.

Cardiogram: a medical instrument used for tracing the movements of the heart.

Cardiograph: is a medical instrument for tracing heart movements.

Chronometer: is an instrument kept on board the ships for measuring accurate time.

Cinematograph: It consists of a series of lenses arranged to throw on a screen an enlarged image of photographs. The lens system which forms the image on the screen is termed the focusing lens.

Commutator: split ring which forms the main part of a D.C. Dynamo.

Compass needle: for knowing approximately the North-South direction at a place.

Crescograph: is an instrument for use in recording growth of plants; invented by J.C. Bose.

Dip Circle: It is an instrument used to determine the angle between the direction of the resultant intensity of earth’s field and the horizontal component at a place. This particular angle is know as the dip of that place.

Drinker’s apparatus: to help breathing in infantile paralysis.



Dynamo: The origin of electricity in a Dynamo is the transformation of mechanical energy into electrical energy. It depends on the principle of electro-magnetic induction whereby a current is produced on traversing a magnetic field.

Electroencephalograph (EEG): It is the technique of recording and interpreting the electrical activity of the brain. Records of the electrical activity of the brain, commonly known as “brain waves”, are called electroencephalograms or electroencephalographs. EEG is the common abbreviation for both the technique and the records.

Epidiascope: for projecting films as well as images of opaque articles on a screen.

Eudiometer: It is a glass tube for measuring volume changes in chemical reactions between gases.

Fathometer: is an instrument used for measuring depth of the ocean.

Galvanometer: an instrument for measuring currents of small magnitude.

G.M. Counter (Geiger Muller Counter): This special device is used for detecting the presence of radiation and counting certain atomic particles.

Gramophone: an instrument with which we can reproduce the sound recorded by a suitable recording apparatus. It is fitted with a special type of apparatus known as sound box invented by Berliner.

Gravimeter: is an instrument for recording measurement under water and to determine the presence of oil deposits under water.

Gyroscope: is an instrument used to illustrate dynamics of rotating bodies. It is a type of spinning wheel fixed to the axle.

Hydrometer: is an instrument used for measuring the specific gravity of liquids.

Hydrophone: is an instrument used for recording sound under water.

Hygrometer: is an instrument used for measuring humidity in air.

Kymograph: is an instrument used to record graphically various physiological movements i.e., blood pressure, heart beating, study of lungs etc in living beings.

Lactometer: is an apparatus used for measuring the purity of milk.

Manometer: for determining the pressure of a gas.

Mariner’s Compass: is an apparatus which is used to guide the sailors. The needle always points north-south.

Micrometer: is an instrument used for converting sound i.e., fraction of the lowest division of a given scale.

Microphone: is an instrument used for converting sound waves into electrical vibrations.

Microscope: is an instrument which is used for magnifying minute objects by a lens system.

Microtome: is used for cutting an object into thin parts for microscopic inspection.

Odometer: is an instrument by virtue of which the distance covered by wheeled vehicles is recorded.

Periscope: It is usually used by the crew of a submarine to survey the ships etc, on the surface of the sea while the submarine is under water. It also enables the sailors to observe objects on the other side of an obstacle without exposing themselves.

Phonograph: is an instrument used for reproducing sound.

Photometer: is an apparatus used to compare the illuminating power of two sources of light.

Pipette: It is a glass tube with the aid of which a definite volume of liquid may be transferred.

Potentiometer: is used for comparing the e.m.f.s, of cells, measurements of the thermal e.m.f.s, large potential differences and currents. It is also used for measuring low resistances.

Psychrometer: is an instrument for measurement of the humidity of the atmosphere.

Pyrometer: is an instrument for recording high temperatures from a great distance (i.e., for recording temperature of the sun etc.) by making use of the laws of radiation.

Radar: Radio, Angle, Detection And Range is used to detect the direction and range of an approaching aeroplane by means of radio microwaves.

Rain Gauge: is an apparatus for recording of rainfall at a particular place.

Radiometer: is an instrument for measuring the emission of radiant energy.

Refractometer: is an instrument to measure refractive indices.

Saccharimeter: is an instrument for determining the amount of sugar in a solution. It is used in breweries.

Seismometer or Seismograph: is an instrument used for recording earthquake shocks.

Sextant: is an instrument invented by John Hadley used for measuring the altitude of the sun and of other inaccessible heavenly bodies.

Spectrometer: (1) It is a type of spectroscope suitable for the precise measurements of refractive indices. (2) An instrument for measuring the energy distribution of a particular type of radiation.

Speedometer: is an instrument which indicates speed at which a vehicle is moving.

Spherometer: is an instrument for measuring curvature of surfaces.

Sphygmomanometer: an instrument used for measuring arterial blood-pressure.

Sphygmophone: an instrument, with the help of which a pulse beat makes a sound.

Sphygmoscope: an instrument, by virtue of which, arterial pulsations become visible.

Stereoscope: It is a special type of binocular, through which a double photograph snapped from two different angles by a two-lensed camera is viewed in solid relief.

Stethoscope: is an instrument to hear and analyse movements of heart and lungs.

Stop watch: for recording small intervals of time in the laboratory, in races and other events.

Stroboscope: is an instrument for viewing objects moving rapidly with a periodic motion and to see them as if they were at rest.

Tachometer: is an instrument for determining speeds of aeroplanes and motor boats.

Telephone: a device by virtue of which two persons at two different places can communicate. It consists of two main parts (i) a microphone and (ii) a receiver.

Teleprinter: an instrument which prints automatically messages sent from one place to another, on telegraph lines.

Telescope: is an apparatus used for observing distant objects.

Theodolite: is an instrument for measuring horizontal and vertical angles.

Thermocouple: an instrument based on thermo-electricity used for measuring temperatures.

Thermometer: is an apparatus used for measuring temperature.

Thermostat: It is an instrument used to regulate the temperature to a particular degree.

Viscometer: is an instrument to measure viscosity.

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About Islam

  1. Important Questions about Islamic Studies
  2. Hazrat Muhammad PBUH
  3. General Knowledge About Hazrat Muhammad PBUH Life
  4. Wives of Hazrat Muhammad PBUH
  5. Important Islamic History Events
  6. Important points of The Holy Quran
  7. Al-Quran MCQs
  8. About SAHABA KARAM
  9. Namaz
  10. Zakat
  11. Fasting (Roza)
  12. Imortant Article of Faith and Fundamental of ISLAM
  13. Important Islamic terms and Places
  14. Islamic Months of Years
  15. General Knowledge-Heavenly Books
  16. Important Angles
  17. Ashra-e-Mubrashra
  18. Reign Of 4 Caliphates(Khulafa Rashideen)
  19. Famous Islamic Generals
  20. Famous Islamic Battles
  21. Important Personalities and Their Titles in Islam
  22. Famous Muslim Scientists

  23. PPSC GENERAL KNOWLEDGE
  24. PPSC PAST Papers General Knowledge Questions


  25. About World

  26. World Records
  27. World Records (Guniees Book)
  28. 7 Wonders of the World
  29. Inventions and Inventors
  30. Important Facts of Worlds
  31. Important Places Of World
  32. Important Awards Of World
  33. Top 10 Languages of World
  34. Highest Military Awards of World
  35. Important Geographical Lines of World
  36. World Imortant National Days
  37. Importnat Religions of World
  38. Important Political terms and concepts
  39. Important News Agency of the World
  40. About UNO
  41. Organs of UNO
  42. Important Specialized agency of the UNO
  43. World Country with Capitals & Currency
  44. Famous Name of Places(Country)

  45. About Pakistan
  46. Basic Information About Pakistan
  47. Districts of Pakistan
  48. RIVERS OF PAKISTAN
  49. The Largest in Pakistan
  50. The Longest and Tallest in Pakistan
  51. Mountain Passes in Pakistan
  52. Chairman Senate and seats Distibutions of Pakistan
  53. Chief Justices of Pakistan
  54. Pakistan Affairs
  55. Who is First in PAKISTAN
  56. PAKISTAN GOVERNOR GENERALS
  57. PAKISTAN Presidents
  58. PAKISTAN Prime Ministers
  59. Attorney Generals of Pakistan
  60. State Bank Governors of pakista
  61. Army Chiefs of PAKISTAN
  62. Federal Cabinet of PAKISTAN
  63. Location of important Metalic and Non Metalic Minerals
  64. Constitutional Amedments Since 1973
  65. Army,PAF and Navy Officer Ranks
  66. Who is Who and What is What

  67. MOUNTAINS
  68. IMPORTANT MOUNTAIN PASSES
  69. OCEANS
  70. FAMOUS SEA PORTS
  71. FAMOUS STRAITS
  72. WORLD RIVERS
  73. FAMOUS ISLANDS
  74. FAMOUS DESERTS
  75. CITIES ON RIVER BANKS
  76. GEOGRAPHICAL DISCOVERIES
  77. WORLD COUNTRIES
  78. GENERAL KNOWLEDGE ABOUT WORLD
  79. IMPORTANT PHYSICAL PROPERTIES
  80. Ten LARGEST COUNTRIES BY AREA
  81. IMPORTANT ABBREVIATIONS
  82. IMPORTANT UNITS OF MEASUREMENT
  83. IMPORTANT INFORMATION ABOUT RAYS AND WAVES
  84. IMPORTANT INFORMATION ABOUT UNIVERSE
  85. NOBLE PRIZE
  86. NATIONAL EMBLEM
  87. FAMOUS EPITHETS
  88. IMPORTANT GEOGRAPHICAL LINES OF WORLD
  89. About Science
  90. Basic Geometry Math Defination
  91. Important Units of Measurments
  92. Basic Scientific Questions