Scientific Instruments Everyday Science Important Mcqs

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1.The microscope is used to study
(a) Distant objects
(b) Near objects
(c) Small objects
(d) Small and near objects
2.The energy of food is measured in
(a) Kelvin
(b) Calories
(c) Bushel
(d) None of these
3.An instrument used for measuring
temperatures at a distance is
(a) gas thermometer
(b) mercury thermometer
(c) radiation pyrometer
(d) maximum-minimum thermometer
4. What is the S.I. unit of temperature?
(a) Kelvin
(b) Celsius
(c) Centigrade
(d) Fahrenheit
5.The telescope is used for viewing
(a) Distant Objects
(b) Near Objects
(c) Small Objects
(d) Living cells

6.Density of milk is measured by
(a) Lactometer
(b) Hydrometer
(c) Barometer
(d) Hygrometer
7.Decibel is a unit of
(b) Light
(a) Sound
(d) Electricity
(c) Heat
8. The instrument used to measure electric current is
(a) Ammeter
(b) Electrometer
(c) Galvanometer
(d) Spectrometer
9.The apparatus used in submarines to give a clear view of the object on the surface of the ocean or ground is known as
(a) Periscope
(b) Sextant
(c) Stereoscope
(d) Telescope
10. Richter scale is used for measuring
(a) Density of liquid
(b) Intensity of earthquakes
(c) Velocity of wind
(d) Humidity of air

11. Fathometer is used to measure
(a) Earthquakes
(b) Rainfall
(c) Ocean depth
(d) Sound intensity
12. Hygrometer is used to measure
(a) Relative humidity- JOELZO
(b) Purity of milk
(c) Specific gravity of a liquid
(d) None of these
13. Venturi tube is used for
(a) Measuring intensity of earthquakes
(b) Measuring specific gravity
(c) Treasuring density
(d) Measuring flow of a fluid
14. Coronograph is used for
(a) Studying the arteries
(b) Studying the chest
(c) Observing and often photographing the sun’s corona
(d) Studying the blood in the human body
15. Microphone is used to convert
(a) Sound waves into electrical energy
(b) Sound waves into light rays
(c) Electrical energy into sound waves
(d) Sound waves into magnetic currents

16. Velocity of wind is measured by
(a) Speedmeter
(b) Tachometer
(c) Anemometer
(d) Audiometer
17. Altimeter is used to measure
(a) The atmospheric pressure
(b) The approximate height above the ground
(c) The strength of an electric current
(d) The difference in hearing
18. Which of the following is used for measurement of pressure?
(a) Saccharimeter
(b) Ammeter
(c) Manometer
(d) Lactometer
19. What does Angstorm measure?
(a) Quantity of liquid
(b) Length of light waves
(c) Length of cables
(d) Speed of ships
20. Light Year is related to
(a) Energy
(b) Speed
(c) Distance
(d) Intensity

21.Which of the following instruments is used to measure pressure of gases?
(a) Barometer
(b) Manometer
(c) Ammeter
(d) None of these
22.Which instrument is used to measure the altitude of the Sun?
(a) pyrometer
(b) telstar
(c) sextant
(d) photometer
23.How many Dynes are there in one gram
(a) 900
(b) 375
(C) 981
(d) 250
24.How many Ergs are there in 1 Joule?
(a) 104
(a) 102
(c) 106
(d) 107
25. The unit of current is
(a) Ohm
(b) Watt
(c) Ampere
(d) None of these

26. The unit of energy in MKS system is
(a) Volt
(b) Erg
(c) Ohm
(d) Joule
27.The intensity of an earthquake is measured with a
(a) Barometer
(b) Hydrometer
(c) Polygraph
(d) Seismograph
28. Centigrade and Fahrenheit scales give the same reading at
(a) -40
(b) -32°
(c) -273
(d) 100
29.The instrument, which is used to measure temperature by radiation, is called
(a) thermopile
(b) thermometer
(c) pyrometer
(d) hydrometer
30.For which purpose instrument centrifuge is Used?
(a) To separate liquids
(b) To separate solids
(c) To separate mixtures of chemicals
(d) None of the above

31.Sailors and other travellers used a device to find close to the North and South geographie poles. How is known the device?
(a) Compass
(b) Magnet
(c) Compass meter
(d) Pole meter
32. Which instrument is used to measure minute electrical currents?
(a) Electrometer
(b) Electric meter
(c) Tonometer
(d) Galvanometer
33. Hydrometer is the device that measures
(a) The acidity of water
(b) The pollution in water
(c) The specific gravity of a liquid
(d) The gravity of milk
34. The nature of disability in hearing is detected by
(a) Audiometer
(b) Crscograph
(c) Earphone
(d) Both b and c
35. Mention the instrument that is used to split light into its spectrum?
(a) Split meter
(b) Spectroscope
(c) Spectrograph
(d) Electrometer

36. Which instrument is use to receive radio waves from objects space?
(a) Radio telescope
(b) Radiograph
(c) Seismograph
(d) Atomic telescope
37. Mention the instrument used to measure intensity of sound
(a) Barometer
(b) Audiometer
(c) Anemometer
(d) Hydrophone
38. A chronometer is used to measure
(a) distance
(b) time
(c) depth of surface covering
(d) none of the above
39. Instrument which detects presence of electric current is called
(a) Electroscope
(b) Endoscope
(c) Monometer
(d) Electroencephalograph
40. Instrument used to view rapidly moving objects is called
(a) Stroboscope
(b) Steroscope
(c) Techeometer
(d) Redar

41 Instrument used to measure distance,elevations and bearings during survey
(a) Tachometer
(b) Tonometer
(c) Taceometer
(d) Udometer
42. Retinoscope is an instrument used to
(a) Thickness of retina
(b) Lens defects
(c) Refractive power of lens
(d) None of the above
43. The final image produced by a simple
microscope is
(a) Virtual and real
(b) Virtual and erect
(c) Erect and real
(d) Real and inverted
44. Photodiode is used for the detection of
(a) Current
(b) Light
(c) Sound
(d) Electric field
45. A polaroid is
(a) A red light filter
(b) A device used for analysing polarized light
(c) A device used in polarimeter
(d) An adjustable shutter

46. An electron microscope employs which one of the following principles?
(a) Electrons have a ave nature
(b) Electrons can be focused by an electric field
(c) Electrons can be focused by magnetic field
(d) All of the above
47.The spectrum of luminous bodies is studied by the instrument called
(a) spectrometer
(b) compound microscope
(c) astronomical telescope
(d) polarimeter
48. For which of the following purposes is a transformer used?
(a) Conversion of D.C. into A.C.
(b) Regulation of fluctuations of voltage
(c) Measurement of flow of electricity
(d) Conversion of low voltage into high voltage and vice-versa
49. Ophthalmoscope is an instrument used to observe
(a) Comea
(b) Lens defect
(c) Retina
(d) Conjunctiva
50. Sonar works on the principle of
(a) Reflection of sound
(b) Absorption of sound
(c) Reflection of radio-waves
(d) None of these

51.When listening to heart beat with stethoscope,one hears
(a) Opening of valves
(b) Closing of valves
(c) Both opening and closing of valves
(d) Neither b nor c
1.d 2. b 3. b .5.a 6. a 7. a 8. a 9.
a 10 b 11.C 12. a 13.d 13. d 14.0 15. a 4. a16.c 21. a 26. d 31. a
17. b 18. 22. 23. C 27. d. 28. a32. d 33.37. b 38. b 42. 43. b 47. a 48. 19.b 24. d 29. 34. a 39. a 44. b 49. C . 25. c 30. 35. b 40. a 45. b 50. a 41.0 46. b 51. B

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