Quantity and Measurement [ General Physics] [ Science Set 8] | | UPPSC Prelims PYQ of Last 30 Years | Objective Questions and Answers, MCQ, and QUIZ ~ Civil Services Self Study ( NCERT Based)

1. Those physical quantities which have magnitude only, are called?

a) Scalars

b) Vectors

c) Fundamental Units

d) Derived Units

Answer. a) Scalars

2. Those physical quantities which have both magnitude and direction, are called?

a) Scalars

b) Vectors

c) Fundamental Units

d) Derived Units

Answer. b) Vectors

3. With reference to the electric potential, which of the following statements is/are correct? ( UPPSC PYQ 2021)

1. It is a scalar quantity

2. It is a vector quantity

Select the correct answer using the codes given below.

Codes:

a) Only1

b) Only 2

c) Both 1 and 2

d) Neither 1 nor 2

Answer. a) Only 1

4. Which of the following is a scalar quantity?

a) Displacement

b) Linear momentum

c) angular velocity

d) temperature

Answer. d) temperature is a scaler quantity.

5. Which of the following is Vectors Quantity?

a) Mass

b) Volume

c) Current density

d) density

Answer. c) Current density is Vectors quantity.

6. Total how many are fundamental Units of the SI System ( International System of Units)?

a) 5

b) 7

c) 9

d) 11

Answer. b) 7

7. Which of the following is the largest unit of Length or distance?

a) Astronomical Unit

b) Light Year

c) Parallax Second ( Par Sec)

d) one Giga meter

Answer. c) Parallax Second ( Par Sec) is the largest unit of distance among all the astrological units.

8. Which of the following is the smallest unit of length or distance?

a) Atto meter

b) Fermi Meter

c) Pico Meter

d) Nanometer

Answer. a) Atto meter is the smallest unit of length.

Atto meter=10^(-18) meter

Fermi Meter=10^(-15) meter

Pico Meter=10^(-12) meter

Nanometer=10^(-9) meter

9. Which of the following is the largest unit of length or distance?

a) Exa meter

b) Peta Meter

c) Tera Meter

d) Giga Meter

Answer. a) Exa meter is the largest unit of length.

Exa meter=10^(18) meter

Peta Meter=10^(15) meter

Tera Meter=10^(12) meter

Gega=10^(9) meter

10. How many liters are there in a cubic meter?

a) 10

b) 100

c) 1000

d) 10,000

Answer: c) 1000, There are 1000 liters in a cubic meter.

11. What is the unit of pressure in the SI system?

a) Newton

b) Joule

c) Pascal

d) Barometer

Answer: c) Pascal The unit of pressure in the SI system is the Pascal (Pa).

12. "The Ringelmann Scale" is used to measure the density of? ( UPPSC PYQ)

a) Smoke

b) Polluted water

c) Fog

d) Noise

Answer. a) Smoke

13. Which one among the following is measured by the Dobson unit? ( UPPSC PYQ)

a) Ozone concentration

b) Thermal conductivity

c) Soil moisture

d) Radiation

Answer. a) Ozone concentration is measured by the Dobson unit.

14. The thickness of the Ozone layer is measured in ( UPPSC PYQ)

a) Lightyear

b) Kilometer

c) Dobson unit

d) Tesla

Answer. c) Dobson unit

15. Match List-I with List-II and select the correct answer using the codes given below the lists: ( UPPSC PYQ)

List-I List-II

( Physical Quantity) ( Unit SI)

a) Pressure 1. Newton

b) Force 2. Kelvin

c) Temperature 3. Pascal

d) Energy 4. Joule

Codes:

a b c d

a) 3 2 1 4

b) 2 3 4 1

c) 4 1 2 3

d) 3 1 2 4

Answer. d) 3 1 2 4

16. Flame photometer is used in the determination of ( UPPSC PYQ)

a) Nitrogen

b) Phosphorus

c) Potassium

d) Boron

Answer. c) Potassium;

17. Which of the following relation is not correct? ( UPPSC PYQ)

a) 1 Byte=8 bits

b) 1 Kilobyte =1024 Bytes

c) 1 Gigabyte=1024 kilobytes

d) 1 Terabyte =1024 Gigabytes

Answer. c) 1 Gigabyte=1024 kilobytes

18. The unit of power is ( UPPSC PYQ)

a) Hertz

b) Volts

c) Watt

d) Neutron

Answer. c) Watt

19. The unit of work is ( UPPSC PYQ)

a) Joule

b) Neutron

c) Watt

d) Dyne

Answer. a) Joule

20. PARSEC is the unit of ( UPPSC PYQ)

a) Astronomical Distance

b) Time

c) Light Intensity

d) Magnetic Force

Answer. a) Astronomical Distance

21. Match the List-I with List-II and select the correct answer from the code given below: ( UPPSC PYQ)

List-I List-II

( Physical Quantities) ( Units)

A. Acceleration 1. Meter/second^2

B. Work Done 2. Joule

C. Force 3. Newton

D. Impulse 4. Newton Second

Code:

A B C D

a) 1 2 3 4

b) 3 4 1 2

c) 2 3 4 1

d) 4 3 1 2

Answer. a) 1 2 3 4

22. Match the following: ( UPPSC PYQ)

A. Joule 1. Current

B. Ampere 2. Power

C. Watt 3. Work

D. Volt 4. Potential Differences

E. Calories 5. Heat

Codes:

A B C D E

a) 3 1 2 4 5

b) 1 2 3 4 5

c) 4 3 2 1 5

d) 1 3 2 4 5

Answer. a) 3 1 2 4 5

23. Which one of the following is NOT correctly matched? ( UPPSC PYQ)

a) Knot - Measure the speed of the ship

b) Knotical mile - Unit of distance used in navigation

c) Angstrom - Unit of the wavelength of light

d) Light year - Unit of measure time

Answer. d) Light year - Unit of measure time

24. Match List-I ( Quantity) with List-II ( Unit) and select the correct answer using the codes given below the lists- ( UPPSC PYQ)

List-I List-II

A. High Velocity 1. Mach

B. Wavelength 2. Angstrom

C. Pressure 3. Pascal

D. Energy 4. Joules

Codes:

A B C D

a) 2 1 3 4

b) 1 2 4 3

c) 1 2 3 4

d) 2 1 4 3

Answer. c) 1 2 3 4

25. One micron represents the length of ( UPPSC PYQ)

a) 10(-6) cm

b) 10 (-4) cm

c) 1 mm

d) 1 m

Answer. b) 10 (-4) cm

26. Which one of the following is NOT correctly matched? (UPPSC PYQ)

a) Decibel - Unit of Loudness

b) Horse Power - Unit of power

c) Nautical miles - Distance unit in navigation

d) Celsius - Unit of Heat

Answer. d) Celsius - Unit of Heat

27. Which one of the following is NOT the unit of heat? ( UPPSC PYQ)

a) Centigrade

b) Calorie

c) Erg

d) Joule

Answer. a) Centigrade

29. What is approximately one of the following "barrels" of oil? ( UPPSC PYQ)

a) 131 liters

b) 159 liters

c) 179 liters

d) 201 liters

Answer. b) 159 liters

30. The smallest unit of the length is ( UPPSC PYQ)

a) Micron

b) Nanometer

c) Angstrom

d) Fermimetre

Answer. d) Fermimetre ( 10(-15) meter)

31. Which one of the following instruments is used for locating submerged objects in an ocean? ( UPPSC PYQ)

a) Audiometer

b) Galvanometer

c) Sextant

d) SONAR

Answer. d) SONAR

32. In SONAR, we use ( UPPSC PYQ)

a) Radio waves

b) Audio Sound Waves

c) Ultrasonic Waves

d) Infrasonic Waves

Answer. c) Ultrasonic Waves

33. The velocity of wind is measured by ( UPPSC PYQ)

a) Barometer

b) Anemometer

c) Hydrometer

d) Windwane

Answer. b) Anemometer;

34. Which of the following is not correctly matched?

a) Anemometer-Wind Speed

b) Ammeter- Electric Current

c) Tachometer-Pressure Difference

d) Pyrometer - High Temperature

Answer. c) Tachometer-Pressure Difference

35. A pyrometer is used to measure- ( UPPSC PYQ)

a) Air Pressure

b) Humidity

c) High Temperature

d) Density

Answer. c) High Temperature

36. Which one of the following devices is used to measure extremely high temperatures? ( UPPSC PYQ)

a) Pyrometer

b) Photometer

c) Photometer

d) Pycnometer

Answer. a) Pyrometer

37. Which one of the following thermometers is known as a pyrometer? ( UPPSC PYQ)

a) Thermo-Electric Thermometer

b) Radiation Thermometers

c) Gas Thermometer

d) Liquid Thermometer

Answer. b) Radiation Thermometers;

38. The thermometer, which used to measure 2000 degree centigrade temperature is ( UPPSC PYQ)

a) Gas Thermometer

b) Mercury Thermometer

c) Total Radiation pyrometer

d) Steam Pressure Thermometer

Answer. c) Total Radiation pyrometer;

39. "Pyrheliometer" is used for measuring: ( UPPSC PYQ)

a) Sun Spots

b) Solar Radiation

c) Air Temperature

d) Temperature of plants

Answer. b) Solar Radiation

40. What is measured by a manometer? ( UPPSC PYQ)

a) Air Pressure

b) Pressure of Gas

c) Density of liquids

d) Oil Pressure on the Surface

Answer. b) Pressure of Gas;

31. Which instrument is used to measure atmospheric pressure? ( UPPSC PYQ)

a) Hydrometer

b) Barometer

c) Manometer

d) Hygrometer

Answer. b) Barometer

32. Relative Humidity is measured by ( UPPSC PYQ)

a) Hydrometer

b) Hygrometer

c) Manometer

d) Potentiometer

Answer. b) Hygrometer;

33. Which of the following is correctly matched? ( UPPSC PYQ)

a) Thermo resistor - Electronic Thermometer

b) Capacitor - Thermometer

c) Bipolar - Rectifier

d) Junction Diode - Amplifier

Answer. a) Thermo resistor - Electronic Thermometer

34. Match List I with List II and select the correct answer from the codes given below the lists: ( UPPSC PYQ)

List-I List-II

A. Stethoscope 1. To measure light intensity

B. Sphygnonometer 2. To detect the purity of gold

C. Karat meter 3. To hear the sound of the heart

D. Lux meter 4. To measure blood pressure

Code:

A B C D

a) 1 2 3 4

b) 4 3 2 1

c) 3 4 2 1

d) 2 1 4 3

Answer. c) 3 4 2 1

35. The name of the equipment used for measuring blood pressure is ( UPPSC PYQ)

a) Tacheo meter

b) Sphygmomanometer

c) Actinometer

d) Barometer

Answer. b) Sphygmomanometer

36. The apparatus used to measure the intensity of light is known as ( UPPSC PYQ)

a) Anemometer

b) Calorimeter

c) Lux meter

d) Altimeter

Answer. c) Lux meter

37. Radar is used for ( UPPSC PYQ)

a) Detecting objects by using light waves

b) Reflecting sound waves to detect objects

c) Determining the presence and location of the object with radio waves

d) Tracking rain-bearing clouds

Answer. c) Determining the presence and location of the object with radio waves

38. Richter Scale is used for measuring- ( UPPSC PYQ)

a) Velocity of sound

b) Intensity of light

c) Amplitude of seismic waves

d) Intensity of sound

Answer. c) Amplitude of seismic waves;

39. Which one of the following devices is used to measure the intensity of an earthquake? ( UPPSC PYQ)

a) Seismograph

b) Stethoscope

c) Cosmograph

d) Periscope

Answer. a) Seismograph;

40. Match The following- ( UPPSC PYQ)

A. Earthquake 1. Ammeter

B. Height 2. Seismograph

C. Electric Current 3. Altimeter

D. Resistance 4. Ohm

Code:

A B C D

a) 2 3 1 4

b) 2 3 4 1

c) 1 3 4 2

d) 2 3 4 1

Answer. a) 2 3 1 4

41. Match List I with List II and select the correct answer from the codes given below the lists: ( UPPSC PYQ)

List I List II

A. Anemometer 1. Earthquake

B. Seismograph 2. Atmospheric Pressure

C. Barograph 3. Wind Velocity

D. Hygrometer 4. Humidity

Code:

A B C D

a) 1 2 3 4

b) 4 1 2 3

c) 4 1 3 2

d) 3 1 2 4

Answer. d) 3 1 2 4

42. Which one of the following is not correctly matched: ( UPPSC PYQ)

A. Manometer - Pressure

B. Carburettor - Internal Combustion Engine

C. Cardiograph - Heart Movement

D. Seismometer - Curvature of surface

Answer. D. Seismometer - Curvature of surface

43. A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance- ( UPPSC PYQ)

a) Increase

b) Decrease

c) Remains unaffected

d) May increase or decrease depending on the atmospheric pressure

Answer. b) Decrease

44. Which of the following is a vector quantity? ( UPPSC PYQ)

a) Time

b) Speed

c) Displacement

d) Distance

Answer. c) Displacement

45. What is the correct equation for finding acceleration? ( UPPSC PYQ)

a) a=v-u/t

b) a=u +vt

c) a=v+u/t

d) a=v+u/2

Answer. a) a=v-u/t

46. A thermostat is a device which ( UPPSC PYQ)

a) Measure heat

b) Measures temperature

c) Automatically regulates the temperature of a system

d) Automatically regulates the pressure of a system

Answer. c) Automatically regulates the temperature of a system

47. The value of one-kilowatt hour is ( UPPSC PYQ)

a) 3.6*10 ^(6) joules

b) 3.6*10 ^(3) joules

c) 10 ^(3) joules

d) 105 joules

Answer. a) 3.6*10 ^(6) joules

48. Five bulbs of 100 W capacity are lit in a tunnel continuously for 20 hours. The entire electricity expenditure will be ( UPPSC PYQ)

a) A unit

b) Two units

c) Ten Units

d) Twenty units

Answer. c) Ten Units

49. Radioactive dating is a technique that can be used to measure ( UPPSC PYQ)

a) The age of rocks

b) Composition of rocks

c) Color of rocks

d) Weight of rocks

Answer. a) The age of rocks

50. Which of the following methods is used for measuring the age of the earth? ( UPPSC PYQ)

a) Carbon dating method

b) Biotechnology method

c) Biological clock method

d) Uranium method

Answer. d) Uranium method

51. "Lightyear " is the measurement of? ( UPPSC PYQ)

a) Time

b) Distance

c) Velocity

d) Heat

Answer. a) Time

52. Unit of Quantum is ( UPPSC 2022 PYQ)

a) Bit

b) Byte

c) Mole

d) Qubit

Answer. d) Qubit

53. Biggest unit of distance is ( UPPSC PYQ)

a) Lightyear

b) Astrological Unit

c) PARSEC

d) Giga meter

Answer. c) PARSEC

1 PARSEC 3.2 lightyear= 3.086 * 10 ^16

54. Which of the following pairs is NOT correctly matched? ( UPPSC PYQ 2022)

Quantity S.I. Unit

a) Pressure: Pascal

b) Power of lense: Diopter

c) Heat: Joule

d) Activity of radio ( Active substance): curie

Answer. d) Activity of radio ( Active substance): curie;

SI unit of Radioactivity is becquerels. Henri Becquerels discovered the Radioactive elements.

Radioactive elements are all those elements in periodic tables whose atomic number is greater than 82.

55.

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