Answered 0 of 25 on this page · Correct 0 · Wrong 0
Q26. The inventor of the electric bulb is-
- AJ.L. Baird
- BJ.B. Reyes
- CThomas Alva Edison
- DMarconi
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Answer: C) Thomas Alva Edison
Q27. Who invented the 'barometer'?
- AEvangelista Torricelli
- BCharles Xavier Thomas
- CEdward Teller
- DGustav Tauschek
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Answer: A) Evangelista Torricelli
Q28. Who invented the 'electronic computer'?
- AEckert and Moschli
- BCarl Wenz
- CThomas Alva Edison
- DEdward Teller
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Answer: A) Eckert and Moschli
Q29. Who invented LED?
- ANick Hollow Nyack
- BElvas Howe
- CChuck Plough
- DChristiaan Huygens
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Answer: A) Nick Hollow Nyack
Q30. The machine gun was invented by-
- AJ.L. by baird
- Bby G. Broussa
- Cby Karl Benz
- Dby James Puckle
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Answer: D) by James Puckle
Q31. Who invented the safety razor?
- ASteve Cher
- BLar Strauss
- CGillette
- DSteve Job
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Answer: C) Gillette
Q32. Who invented the mercury thermometer?
- ANewton
- BFahrenheit
- CPriestley
- DGalileo
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Answer: B) Fahrenheit
Q33. Who invented the mobile phone?
- ARaymond Samuel Tomlinson
- BMartin Cooper
- CChuck Hoole
- DTim Berners-Lee
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Answer: B) Martin Cooper
Q34. Who invented the battery?
- AVolta
- BRoentgen
- CFaraday
- DMaxwell
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Answer: A) Volta
Q35. Mark the wrong pair from the following-
- AMadame Curie - Dynamite
- BA.G. Bell - Telephone
- CJ.L. Baird - Television
- DJames Watt - Steam Engine
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Answer: A) Madame Curie - Dynamite
Q36. Who invented the diesel engine?
- ARudolph
- BJohn Napier
- CMacmillan
- DJohn Macadam
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Answer: A) Rudolph
Q37. What did Alfred Nobel invent?
- Amicrophone
- Btypewriter
- Cdynamite
- Dgramophone
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Answer: C) dynamite
Q38. The acidity of rain is measured by-
- Abarometer
- BHygrometer
- CAmmeter
- DpH meter
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Answer: D) pH meter
Q39. Pyrometer is used to measure the following:
- Aair pressure
- Bintensity of the earthquake
- Chigh temperature
- Dhumidity
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Answer: C) high temperature
Q40. Which of the following instruments is used to find the position of objects submerged in the ocean?
- Aaudiometer
- Bgalvanometer
- CSextant
- DSonar
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Answer: D) Sonar
Q41. Which of the following is not correctly matched?
- AManometer - pressure
- BCarburetor - Internal Combustion Engine
- CCardiograph - heart rate
- DSeismometer - surface curvature
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Answer: D) Seismometer - surface curvature
Q42. Which of the following is not correctly matched?
- AAnemometer - Wind Speed
- Bammeter - electric current
- Ctachometer - pressure difference
- DPyrometer - High Temperature
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Answer: C) tachometer - pressure difference
Q43. Relative humidity is measured by—
- Afrom a hydrometer
- Bfrom a hygrometer
- Cby lactometer
- Dfrom a potentiometer
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Answer: B) from a hygrometer
Q44. The function of 'thermostat' in a refrigerator is-
- ALowering the temperature
- Bincrease freezing temperature
- Cmaintain a consistent temperature
- DDecreasing the melting point
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Answer: C) maintain a consistent temperature
Q45. What is measured by a manometer?
- Aair pressure
- Bgas pressure
- Coil pressure at the surface
- DDensity of liquids
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Answer: B) gas pressure
Q46. Which instrument is used to measure the humidity of air?
- AHygrometer
- BHydrometer
- CManometer
- Dodometer
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Answer: A) Hygrometer
Q47. What is used to measure the density of milk?
- Alactometer
- BHydrometer
- Cbarometer
- DHygrometer
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Answer: A) lactometer
Q48. Which of the following is used to measure height?
- Abarometer
- BPlanimeter
- CAltimeter
- DHydrometer
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Answer: C) Altimeter
Q49. How is the intensity of an earthquake measured?
- Abarometer
- BHydrometer
- Cpolygraph
- DSeismograph
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Answer: D) Seismograph
Q50. Carburetor is used for-
- Asupplying petrol to the engine
- Bmixing air with petrol
- Cpurifying petrol
- DPurifying the air
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Answer: B) mixing air with petrol