| Instrument | Inventor(s) | Year | Brief Use |
| Accelerometer | George Atwood | 1780s | Measures acceleration |
| Actinometer | John Herschel | 1825 | Measures radiation intensity |
| Altimeter | Louis Paul Cailletet | 1880s | Measures altitude |
| Ammeter | Friedrich Drexler | 1884 | Measures electric current |
| Anemometer | Leon Battista Alberti | 1450 | Measures wind speed |
| Audiometer | Georg von Békésy | 1920s | Measures sound intensity |
| Barograph | Lucien Vidie | 1843 | Records atmospheric pressure |
| Barometer | Evangelista Torricelli | 1643 | Measures atmospheric pressure |
| Battery | Alessandro Volta | 1800 | Stores electrical energy |
| Binoculars | J. P. Lemiere | 1820s | Magnifies distant objects |
| Bolometer | Samuel Pierpont Langley | 1880 | Measures infrared radiation |
| Caliper | Pierre Vernier | 1631 | Measures dimensions |
| Calorimeter | Antoine Lavoisier | 1780s | Measures heat transfer |
| Carburettor | Samuel Morey | 1826 | Mixes air and fuel |
| Cathetometer | P. Dulong and A. Petit | 1816 | Measures heights and levels |
| Chronometer | John Harrison | 1735 | Precise timekeeping |
| Colorimeter | John T. Stock | 1920s | Compares color intensity |
| Commutator | William Sturgeon | 1832 | Reverses electric current |
| Cryometer | James Six | 1782 | Measures low temperatures |
| Cyclotron | Ernest Lawrence | 1930 | Accelerates charged particles |
| Cassegrain Telescope | Guillaume Cassegrain | 1672 | Reflecting telescope design |
| Dilatometer | Ernst Abbe and Hippolyte Fizeau | 1850s | Measures volume changes |
| Dynamo | Michael Faraday | 1832 | Converts mechanical to electrical energy |
| Dynamometer | Edme Regnier | 1798 | Measures force and torque |
| Electrometer | William Snow Harris | 1834 | Measures electric potential |
| Electroscope | Abraham Bennet | 1787 | Detects electric charge |
| Electron Microscope | Ernst Ruska | 1931 | Magnifies tiny objects |
| Fluxmeter | Not specified | – | Measures magnetic flux |
| Fathometer | Herbert Grove Dorsey | 1923 | Measures water depth |
| Galvanometer | Johann Schweigger | 1820 | Detects electric current |
| Gyroscope | Jean Bernard Léon Foucault | 1852 | Measures orientation |
| Hydrometer | Nicolas Santorio | 1615 | Measures liquid density |
| Hydrophone | Fessenden | 1919 | Detects underwater sound |
| Hygrometer | Leonardo da Vinci | 15th c. | Measures humidity |
| Hygroscope | Not specified | – | Indicates humidity changes |
| Hypsometer | Regnault | 1850s | Measures boiling point |
| Lactometer | Not specified | – | Measures milk density |
| Machmeter | Wayne R. Norman | 1940s | Measures speed relative to sound |
| Manometer | Evangelista Torricelli | 1643 | Measures gas pressure |
| Micrometer | William Gascoigne | 1638 | Measures small lengths |
| Microphone | Emile Berliner | 1877 | Converts sound to electrical signal |
| Microelectrode | Ida Henrietta Hyde | 1930s | Records electrical activity |
| Microscope | Zacharias Janssen | 1590 | Magnifies small objects |
| Nephelometer | Theodore William Richards | 1900s | Measures light scattering |
| Odometer | Benjamin Franklin | 1770s | Measures distance traveled |
| Ohmmeter | Oswald Robert Harold | 1910s | Measures electrical resistance |
| Ondometer | Not specified | – | Measures wave frequency |
| Optometer | Jules Badal | 1870s | Tests eye refraction |
| Oscilloscope | André Blondel | 1893 | Visualizes electrical waveforms |
| Periscope | Not specified | 1850s | Views around obstacles |
| Photometer | Dmitry Lachinov | 1880s | Measures light intensity |
| Photogate | Not specified | – | Measures motion timing |
| Potentiometer | Johann Poggendorff | 1841 | Measures voltage |
| Pyrheliometer | C. G. Abbot | 1910s | Measures solar radiation |
| Pyrometer | Josiah Wedgwood | 1790 | Measures high temperatures |
| Quadrant | John Hadley | 1730 | Measures angles |
| Radar | Heinrich Hertz | 1886 | Detects objects via radio waves |
| Rain Gauge | King Sejong the Great | 1441 | Measures precipitation |
| Reflecting Telescope | James Gregory | 1663 | Magnifies distant objects |
| Refractometer | Ernst Abbe | 1880s | Measures refractive index |
| Ripple Tank | Not specified | – | Demonstrates wave properties |
| Schmidt-Cassegrain Telescope | Bernard Schmidt | 1930 | Compact reflecting telescope |
| Seismograph | John Milne | 1880 | Records earthquakes |
| Sextant | John Hadley | 1731 | Measures angular distances |
| Spectrometer | Joseph von Fraunhofer | 1814 | Analyzes light spectra |
| Spectroscope | William Crookes | 1870s | Examines spectra |
| Speedometer | Not specified | – | Measures vehicle speed |
| Spherometer | Not specified | – | Measures sphere curvature |
| Stopwatch | Not specified | – | Measures short time intervals |
| Tachometer | Dietrich Uhlhorn | 1810 | Measures rotational speed |
| Tangent Galvanometer | Not specified | – | Measures direct current |
| Telescope | Hans Lippershey | 1608 | Magnifies distant objects |
| Tensiometer | Not specified | – | Measures surface tension |
| Thermometer | Galileo Galilei | 1593 | Measures temperature |
| Thermostat | Warren S. Johnson | 1883 | Regulates temperature |
| Tonometer | John Austin | 1711 | Measures sound pitch |
| Transformer | Ottó Bláthy | 1885 | Changes voltage levels |
| Transponder | Charles M. Redman | 1940s | Receives and retransmits signals |
| Venturimeter | Clemens Herschel | 1887 | Measures fluid flow |
| Vernier Caliper | Pierre Vernier | 1631 | Precise length measurement |
| Viscometer | Edward H. Zeitfuchs | 1920s | Measures liquid viscosity |
| Voltmeter | William Thomson (Kelvin) | 1880s | Measures voltage |
| Wattmeter | Ottó Bláthy | 1889 | Measures electrical power |
| Wavemeter | Paul D. Zottu | 1920s | Measures radio wavelengths |
Q1. Who is the inventor of Accelerometer?
A) Ernst Ruska
B) Hans Lippershey
C) Paul D. Zottu
D) George Atwood
Correct Answer: D
Q2. What does the Actinometer measure?
A) Measures dimensions
B) Measures humidity
C) Measures radiation intensity
D) Measures infrared radiation
Correct Answer: C
Q3. What does the Altimeter measure?
A) Measures altitude
B) Measures low temperatures
C) Magnifies distant objects
D) Measures liquid density
Correct Answer: A
Q4. In which year was the Ammeter invented?
A) Edward H. Zeitfuchs
B) P. Dulong and A. Petit
C) Friedrich Drexler
D) William Sturgeon
Correct Answer: C
Q5. What does the Anemometer measure?
A) Measures heat transfer
B) Measures voltage
C) Measures magnetic flux
D) Measures wind speed
Correct Answer: D
Q6. In which year was the Audiometer invented?
A) Abraham Bennet
B) Georg von Békésy
C) Ernst Abbe
D) William Gascoigne
Correct Answer: B
Q7. Who is the inventor of Barograph?
A) Lucien Vidie
B) John Hadley
C) Paul D. Zottu
D) Josiah Wedgwood
Correct Answer: A
Q8. What does the Barometer measure?
A) Measures dimensions
B) Precise timekeeping
C) Measures atmospheric pressure
D) Measures vehicle speed
Correct Answer: C
Q9. In which year was the Battery invented?
A) Abraham Bennet
B) Alessandro Volta
C) John Hadley
D) Hans Lippershey
Correct Answer: B
Q10. Who invented the Binoculars?
A) William Thomson (Kelvin)
B) J. P. Lemiere
C) Josiah Wedgwood
D) Hans Lippershey
Correct Answer: B
Q11. Who invented the Bolometer?
A) Jean Bernard Léon Foucault
B) Samuel Pierpont Langley
C) Nicolas Santorio
D) Fessenden
Correct Answer: B
Q12. What does the Caliper measure?
A) Measures dimensions
B) Detects underwater sound
C) Measures heights and levels
D) Measures sound intensity
Correct Answer: A
Q13. What does the Calorimeter measure?
A) Measures heat transfer
B) Measures radiation intensity
C) Mixes air and fuel
D) Magnifies distant objects
Correct Answer: A
Q14. Who is the inventor of Carburettor?
A) William Thomson (Kelvin)
B) Ida Henrietta Hyde
C) Samuel Morey
D) Pierre Vernier
Correct Answer: C
Q15. Who invented the Cathetometer?
A) Nicolas Santorio
B) P. Dulong and A. Petit
C) Lucien Vidie
D) Georg von Békésy
Correct Answer: B
Q16. Who is the inventor of Chronometer?
A) John Hadley
B) Evangelista Torricelli
C) Georg von Békésy
D) John Harrison
Correct Answer: D
Q17. In which year was the Colorimeter invented?
A) Dmitry Lachinov
B) Abraham Bennet
C) Pierre Vernier
D) John T. Stock
Correct Answer: D
Q18. Who is the inventor of Commutator?
A) William Sturgeon
B) Jules Badal
C) Pierre Vernier
D) James Gregory
Correct Answer: A
Q19. Who is the inventor of Cryometer?
A) Guillaume Cassegrain
B) Wayne R. Norman
C) Johann Poggendorff
D) James Six
Correct Answer: D
Q20. Who invented the Cyclotron?
A) Georg von Békésy
B) Ernest Lawrence
C) Ottó Bláthy
D) Samuel Morey
Correct Answer: B
Q21. Who is the inventor of Cassegrain Telescope?
A) Johann Poggendorff
B) Galileo Galilei
C) Dmitry Lachinov
D) Guillaume Cassegrain
Correct Answer: D
Q22. Who is the inventor of Dilatometer?
A) Joseph von Fraunhofer
B) Leon Battista Alberti
C) Emile Berliner
D) Ernst Abbe and Hippolyte Fizeau
Correct Answer: D
Q23. In which year was the Dynamo invented?
A) Josiah Wedgwood
B) John Harrison
C) Michael Faraday
D) Galileo Galilei
Correct Answer: C
Q24. In which year was the Dynamometer invented?
A) Jean Bernard Léon Foucault
B) Pierre Vernier
C) Dmitry Lachinov
D) Edme Regnier
Correct Answer: D
Q25. Who invented the Electrometer?
A) William Snow Harris
B) Pierre Vernier
C) Joseph von Fraunhofer
D) Ottó Bláthy
Correct Answer: A
Q26. What does the Electroscope measure?
A) Measures refractive index
B) Precise length measurement
C) Magnifies distant objects
D) Detects electric charge
Correct Answer: D
Q27. What does the Electron Microscope measure?
A) Magnifies tiny objects
B) Measures milk density
C) Changes voltage levels
D) Measures electrical power
Correct Answer: A
Q28. Who invented the Fluxmeter?
A) Bernard Schmidt
B) William Gascoigne
C) None
D) John Harrison
Correct Answer: C
Q29. Who invented the Fathometer?
A) Louis Paul Cailletet
B) Herbert Grove Dorsey
C) Pierre Vernier
D) Zacharias Janssen
Correct Answer: B
Q30. Who invented the Galvanometer?
A) Samuel Pierpont Langley
B) John Harrison
C) Johann Schweigger
D) George Atwood
Correct Answer: C
Q31. Who invented the Gyroscope?
A) Dmitry Lachinov
B) Friedrich Drexler
C) Jean Bernard Léon Foucault
D) Regnault
Correct Answer: C
Q32. Who is the inventor of Hydrometer?
A) Herbert Grove Dorsey
B) Jean Bernard Léon Foucault
C) Nicolas Santorio
D) John Austin
Correct Answer: C
Q33. What does the Hydrophone measure?
A) Indicates humidity changes
B) Measures dimensions
C) Detects underwater sound
D) Measures heat transfer
Correct Answer: C
Q34. Who invented the Hygrometer?
A) Clemens Herschel
B) Alessandro Volta
C) Leonardo da Vinci
D) Lucien Vidie
Correct Answer: C
Q35. What does the Hygroscope measure?
A) Measures atmospheric pressure
B) Indicates humidity changes
C) Measures liquid density
D) Measures humidity
Correct Answer: B
Q36. Who is the inventor of Hypsometer?
A) Regnault
B) Lucien Vidie
C) John Harrison
D) P. Dulong and A. Petit
Correct Answer: A
Q37. Who invented the Lactometer?
A) Antoine Lavoisier
B) William Crookes
C) Louis Paul Cailletet
D) None
Correct Answer: D
Q38. Who invented the Machmeter?
A) J. P. Lemiere
B) Wayne R. Norman
C) Friedrich Drexler
D) Jules Badal
Correct Answer: B
Q39. What does the Manometer measure?
A) Measures electrical power
B) Measures gas pressure
C) Mixes air and fuel
D) Precise timekeeping
Correct Answer: B
Q40. What does the Micrometer measure?
A) Measures refractive index
B) Measures small lengths
C) Measures low temperatures
D) Regulates temperature
Correct Answer: B
Q41. What does the Microphone measure?
A) Precise timekeeping
B) Measures acceleration
C) Measures altitude
D) Converts sound to electrical signal
Correct Answer: D
Q42. Who is the inventor of Microelectrode?
A) William Crookes
B) James Gregory
C) Ida Henrietta Hyde
D) Charles M. Redman
Correct Answer: C
Q43. In which year was the Microscope invented?
A) Samuel Pierpont Langley
B) Paul D. Zottu
C) Zacharias Janssen
D) Clemens Herschel
Correct Answer: C
Q44. Who invented the Nephelometer?
A) Dmitry Lachinov
B) Oswald Robert Harold
C) James Six
D) Theodore William Richards
Correct Answer: D
Q45. Who invented the Odometer?
A) Heinrich Hertz
B) Galileo Galilei
C) Benjamin Franklin
D) Guillaume Cassegrain
Correct Answer: C
Q46. In which year was the Ohmmeter invented?
A) Ida Henrietta Hyde
B) Oswald Robert Harold
C) William Thomson (Kelvin)
D) Leon Battista Alberti
Correct Answer: B
Q47. What does the Ondometer measure?
A) Measures precipitation
B) Records atmospheric pressure
C) Measures force and torque
D) Measures wave frequency
Correct Answer: D
Q48. Who invented the Optometer?
A) James Six
B) Zacharias Janssen
C) Ottó Bláthy
D) Jules Badal
Correct Answer: D
Q49. Who invented the Oscilloscope?
A) André Blondel
B) Friedrich Drexler
C) Nicolas Santorio
D) P. Dulong and A. Petit
Correct Answer: A
Q50. What does the Periscope measure?
A) Measures speed relative to sound
B) Views around obstacles
C) Measures orientation
D) Measures acceleration
Correct Answer: B
Q51. Who is the inventor of Photometer?
A) Emile Berliner
B) Samuel Morey
C) Fessenden
D) Dmitry Lachinov
Correct Answer: D
Q52. Who invented the Photogate?
A) Louis Paul Cailletet
B) None
C) Friedrich Drexler
D) Dietrich Uhlhorn
Correct Answer: B
Q53. In which year was the Potentiometer invented?
A) J. P. Lemiere
B) Louis Paul Cailletet
C) Johann Poggendorff
D) John Hadley
Correct Answer: C
Q54. What does the Pyrheliometer measure?
A) Measures solar radiation
B) Measures motion timing
C) Measures gas pressure
D) Measures short time intervals
Correct Answer: A
Q55. What does the Pyrometer measure?
A) Measures high temperatures
B) Measures rotational speed
C) Measures distance traveled
D) Measures infrared radiation
Correct Answer: A
Q56. In which year was the Quadrant invented?
A) John Hadley
B) Evangelista Torricelli
C) Antoine Lavoisier
D) Dmitry Lachinov
Correct Answer: A
Q57. Who is the inventor of Radar?
A) P. Dulong and A. Petit
B) Heinrich Hertz
C) Ottó Bláthy
D) John Milne
Correct Answer: B
Q58. What does the Rain Gauge measure?
A) Measures altitude
B) Measures precipitation
C) Measures wind speed
D) Measures atmospheric pressure
Correct Answer: B
Q59. In which year was the Reflecting Telescope invented?
A) William Crookes
B) Samuel Pierpont Langley
C) James Gregory
D) Heinrich Hertz
Correct Answer: C
Q60. Who invented the Refractometer?
A) King Sejong the Great
B) James Gregory
C) Ernst Abbe
D) Herbert Grove Dorsey
Correct Answer: C
Q61. What does the Ripple Tank measure?
A) Measures light intensity
B) Stores electrical energy
C) Measures wind speed
D) Demonstrates wave properties
Correct Answer: D
Q62. In which year was the Schmidt-Cassegrain Telescope invented?
A) Michael Faraday
B) Alessandro Volta
C) Bernard Schmidt
D) Edme Regnier
Correct Answer: C
Q63. Who invented the Seismograph?
A) William Snow Harris
B) Ernst Abbe
C) John Herschel
D) John Milne
Correct Answer: D
Q64. Who invented the Sextant?
A) Michael Faraday
B) John Hadley
C) Alessandro Volta
D) Josiah Wedgwood
Correct Answer: B
Q65. Who is the inventor of Spectrometer?
A) Paul D. Zottu
B) Joseph von Fraunhofer
C) George Atwood
D) Clemens Herschel
Correct Answer: B
Q66. Who is the inventor of Spectroscope?
A) P. Dulong and A. Petit
B) William Crookes
C) William Gascoigne
D) C. G. Abbot
Correct Answer: B
Q67. What does the Speedometer measure?
A) Measures vehicle speed
B) Measures heights and levels
C) Precise length measurement
D) Detects objects via radio waves
Correct Answer: A
Q68. Who invented the Spherometer?
A) Zacharias Janssen
B) Lucien Vidie
C) Ottó Bláthy
D) None
Correct Answer: D
Q69. What does the Stopwatch measure?
A) Measures short time intervals
B) Measures sound intensity
C) Precise timekeeping
D) Detects objects via radio waves
Correct Answer: A
Q70. In which year was the Tachometer invented?
A) Joseph von Fraunhofer
B) Theodore William Richards
C) Friedrich Drexler
D) Dietrich Uhlhorn
Correct Answer: D
Q71. In which year was the Tangent Galvanometer invented?
A) Paul D. Zottu
B) None
C) Guillaume Cassegrain
D) Friedrich Drexler
Correct Answer: B
Q72. In which year was the Telescope invented?
A) Hans Lippershey
B) William Snow Harris
C) Friedrich Drexler
D) Lucien Vidie
Correct Answer: A
Q73. Who is the inventor of Tensiometer?
A) Leonardo da Vinci
B) None
C) Dietrich Uhlhorn
D) Regnault
Correct Answer: B
Q74. In which year was the Thermometer invented?
A) Ernest Lawrence
B) Pierre Vernier
C) Evangelista Torricelli
D) Galileo Galilei
Correct Answer: D
Q75. Who is the inventor of Thermostat?
A) P. Dulong and A. Petit
B) Warren S. Johnson
C) Pierre Vernier
D) Galileo Galilei
Correct Answer: B
Q76. Who is the inventor of Tonometer?
A) John Austin
B) Ernst Ruska
C) Josiah Wedgwood
D) Ottó Bláthy
Correct Answer: A
Q77. Who is the inventor of Transformer?
A) Leon Battista Alberti
B) J. P. Lemiere
C) Ottó Bláthy
D) Samuel Pierpont Langley
Correct Answer: C
Q78. What does the Transponder measure?
A) Measures small lengths
B) Detects electric current
C) Measures altitude
D) Receives and retransmits signals
Correct Answer: D
Q79. In which year was the Venturimeter invented?
A) Clemens Herschel
B) Heinrich Hertz
C) Benjamin Franklin
D) Emile Berliner
Correct Answer: A
Q80. Who invented the Vernier Caliper?
A) Leon Battista Alberti
B) King Sejong the Great
C) Pierre Vernier
D) Oswald Robert Harold
Correct Answer: C
Q81. Who invented the Viscometer?
A) Leon Battista Alberti
B) Johann Schweigger
C) Edward H. Zeitfuchs
D) John Harrison
Correct Answer: C
Q82. Who invented the Voltmeter?
A) Ida Henrietta Hyde
B) William Crookes
C) William Thomson (Kelvin)
D) Georg von Békésy
Correct Answer: C
Q83. In which year was the Wattmeter invented?
A) John Milne
B) Warren S. Johnson
C) Samuel Pierpont Langley
D) Ottó Bláthy
Correct Answer: D
Q84. Who is the inventor of Wavemeter?
A) Paul D. Zottu
B) Wayne R. Norman
C) William Thomson (Kelvin)
D) Abraham Bennet
Correct Answer: A
Q85. What does the Accelerometer measure?
A) Visualizes electrical waveforms
B) Measures acceleration
C) Stores electrical energy
D) Measures radiation intensity
Correct Answer: B
Q86. In which year was the Actinometer invented?
A) William Gascoigne
B) Paul D. Zottu
C) John Herschel
D) Heinrich Hertz
Correct Answer: C
Q87. What does the Altimeter measure?
A) Measures altitude
B) Visualizes electrical waveforms
C) Measures sound intensity
D) Measures sphere curvature
Correct Answer: A
Q88. What does the Ammeter measure?
A) Magnifies tiny objects
B) Measures electric current
C) Measures boiling point
D) Measures water depth
Correct Answer: B
Q89. Who is the inventor of Anemometer?
A) Clemens Herschel
B) Leon Battista Alberti
C) Georg von Békésy
D) Johann Schweigger
Correct Answer: B
Q90. Who invented the Audiometer?
A) Friedrich Drexler
B) Georg von Békésy
C) William Thomson (Kelvin)
D) Alessandro Volta
Correct Answer: B
Q91. In which year was the Barograph invented?
A) Leon Battista Alberti
B) Georg von Békésy
C) Pierre Vernier
D) Lucien Vidie
Correct Answer: D
Q92. Who is the inventor of Barometer?
A) Warren S. Johnson
B) Ernest Lawrence
C) George Atwood
D) Evangelista Torricelli
Correct Answer: D
Q93. In which year was the Battery invented?
A) Edward H. Zeitfuchs
B) Fessenden
C) Alessandro Volta
D) Oswald Robert Harold
Correct Answer: C
Q94. What does the Binoculars measure?
A) Measures sound intensity
B) Measures altitude
C) Detects electric charge
D) Magnifies distant objects
Correct Answer: D
Q95. Who is the inventor of Bolometer?
A) Edme Regnier
B) P. Dulong and A. Petit
C) Bernard Schmidt
D) Samuel Pierpont Langley
Correct Answer: D
Q96. Who invented the Caliper?
A) Jean Bernard Léon Foucault
B) Pierre Vernier
C) Antoine Lavoisier
D) William Snow Harris
Correct Answer: B
Q97. In which year was the Calorimeter invented?
A) Nicolas Santorio
B) William Thomson (Kelvin)
C) Antoine Lavoisier
D) John Herschel
Correct Answer: C
Q98. Who is the inventor of Carburettor?
A) Lucien Vidie
B) Ernst Abbe
C) Samuel Morey
D) Alessandro Volta
Correct Answer: C
Q99. What does the Cathetometer measure?
A) Measures electric current
B) Measures voltage
C) Examines spectra
D) Measures heights and levels
Correct Answer: D
Q100. Who is the inventor of Chronometer?
A) John Austin
B) Charles M. Redman
C) Emile Berliner
D) John Harrison
Correct Answer: D
