1. Question 1 of 100

   A mass spectrometer is used to determine

   A Speed of light B Frequency of sound C Mass-to-charge ratio of ions D Heat capacity
2. Question 2 of 100

   A light year is a unit of

   A Time B Speed C Brightness D Distance
3. Question 3 of 100

   The dimensional formula of force is

   A M L^2 T^-2 B M L^-1 T^-2 C M L T^-2 D M L T^-1
4. Question 4 of 100

   The SI unit of force is the

   A Newton B Joule C Pascal D Watt
5. Question 5 of 100

   The number of SI base units is

   A Five B Seven C Six D Nine
6. Question 6 of 100

   International standards of measurement are maintained by the BIPM located at

   A Sevres, near Paris B Geneva C London D Washington
7. Question 7 of 100

   The least count of a screw gauge equals

   A Pitch times divisions B Divisions divided by pitch C Length of the screw D Pitch divided by number of circular scale divisions
8. Question 8 of 100

   A vernier caliper is used to measure small lengths with an accuracy of about

   A 1 cm B 0.1 mm (0.01 cm) C 0.001 mm D 10 cm
9. Question 9 of 100

   A spectrophotometer is based on the

   A Boyle's law B Ohm's law C Beer-Lambert law D Snell's law
10. Question 10 of 100

    A screw gauge (micrometer) typically measures lengths accurately to

    A 1 mm B 1 cm C 0.01 mm D 0.1 m
11. Question 11 of 100

    A pH meter measures

    A Salinity only B Temperature C Acidity or alkalinity of a solution D Density
12. Question 12 of 100

    The unit of equivalent radiation dose is the

    A Becquerel B Gray C Curie D Sievert
13. Question 13 of 100

    A hygrometer is used to measure

    A Humidity of air B Air pressure C Wind direction D Temperature
14. Question 14 of 100

    An astronomical unit (AU) is approximately

    A The Earth-Moon distance B One light year C The mean Earth-Sun distance (about 150 million km) D The radius of the Sun
15. Question 15 of 100

    The SI unit of capacitance is the

    A Henry B Tesla C Weber D Farad
16. Question 16 of 100

    The difference between accuracy and precision is that precision refers to

    A Closeness of repeated measurements to each other B Closeness to the true value C The number of instruments used D The size of the scale
17. Question 17 of 100

    The resolving power of a microscope is

    A Inversely proportional to the wavelength of the light used B Directly proportional to the wavelength C Independent of wavelength D Proportional to its length only
18. Question 18 of 100

    An EEG records

    A Heart B Electrical activity of the brain C Eyes D Muscles
19. Question 19 of 100

    A speedometer in a vehicle shows

    A Distance only B Fuel level C Instantaneous speed D Engine temperature
20. Question 20 of 100

    One fermi (femtometre) equals

    A 10^-12 metre B 10^-15 metre C 10^-9 metre D 10^-18 metre
21. Question 21 of 100

    The SI unit of length is the

    A Kilometre B Metre C Foot D Yard
22. Question 22 of 100

    A Pitot tube is used to measure

    A Airspeed of an aircraft B Depth of sea C Blood pressure D Radiation dose
23. Question 23 of 100

    The least count of a vernier caliper is

    A 1 main scale division plus 1 vernier division B Pitch divided by divisions C Total length of main scale D 1 main scale division minus 1 vernier scale division
24. Question 24 of 100

    The unit of the Planck constant is

    A Joule second B Joule per second C Watt D Newton
25. Question 25 of 100

    A rain gauge measures

    A Rainfall B Humidity C Wind D Temperature
26. Question 26 of 100

    The SI unit of energy and work is the

    A Joule B Watt C Newton D Pascal
27. Question 27 of 100

    The dimensional formula of energy is

    A M L T^-2 B M L^2 T^-3 C M L T^-1 D M L^2 T^-2
28. Question 28 of 100

    The SI unit of amount of substance is the

    A Mole B Gram C Kilogram D Candela
29. Question 29 of 100

    An ECG machine records

    A Brain waves B Muscle strength C Lung volume D Electrical activity of the heart
30. Question 30 of 100

    The SI unit of inductance is the

    A Farad B Henry C Tesla D Ohm
31. Question 31 of 100

    A cloud chamber, invented by C.T.R. Wilson, is used to

    A Measure humidity B Photograph stars C Observe tracks of charged particles D Detect sound waves
32. Question 32 of 100

    X-ray crystallography, used to determine DNA structure, is based on

    A Refraction of light B Reflection of sound C Diffraction of X-rays D Absorption of radio waves
33. Question 33 of 100

    The second is defined using the radiation of

    A Hydrogen atoms B Caesium-133 atoms C Uranium-235 D Carbon-14
34. Question 34 of 100

    The SI unit of pressure is the

    A Newton B Bar C Pascal D Torr
35. Question 35 of 100

    The scanning tunnelling microscope (1981) was invented by

    A Ruska and Knoll B Hooke and Leeuwenhoek C Bragg and Bragg D Binnig and Rohrer
36. Question 36 of 100

    A calorimeter measures

    A Quantity of light B Quantity of heat C Quantity of charge D Quantity of sound
37. Question 37 of 100

    RADAR detects the position and speed of objects using

    A Radio waves B Ultrasonic waves C X-rays D Gamma rays
38. Question 38 of 100

    The number of significant figures in 0.00450 is

    A 5 B 3 C 2 D 6
39. Question 39 of 100

    A tachometer measures

    A Linear speed only B Temperature C Voltage D Rotational speed (rpm)
40. Question 40 of 100

    The SI unit of power is the

    A Joule B Watt C Newton D Volt
41. Question 41 of 100

    Gravitational waves were first detected using an

    A Radio telescope B Cyclotron C Mass spectrometer D Laser interferometer (LIGO)
42. Question 42 of 100

    A Venturi meter is used to measure

    A Temperature B Wind direction C Humidity D Flow rate of a fluid in a pipe
43. Question 43 of 100

    A magnetic compass is used to find

    A Time B Distance C Speed D Direction
44. Question 44 of 100

    A Geiger-Muller counter detects

    A Sound B Magnetism C Humidity D Radioactive radiation
45. Question 45 of 100

    100 degrees Celsius is equal to

    A 100 degrees Fahrenheit B 180 degrees Fahrenheit C 212 degrees Fahrenheit D 32 degrees Fahrenheit
46. Question 46 of 100

    Since 2019, the kelvin has been defined by fixing the value of the

    A Boltzmann constant B Planck constant C Gas constant only D Avogadro constant
47. Question 47 of 100

    A seismograph records

    A Wind speed B Sound waves C Cyclones D Earthquake waves
48. Question 48 of 100

    The electron microscope has greater resolving power than an optical microscope because electrons have

    A A longer wavelength B Greater mass only C No charge D A much shorter wavelength
49. Question 49 of 100

    The metre is defined as the distance light travels in vacuum in

    A 1 second B 1/1,000,000 of a second C 1/299,792,458 of a second D 1/3,600 of a second
50. Question 50 of 100

    The SI unit of mass is the

    A Gram B Pound C Tonne D Kilogram
51. Question 51 of 100

    A stopwatch is used to measure

    A Speed of wind B Distance C Temperature D Short intervals of time
52. Question 52 of 100

    A lactometer is used to test the

    A Fat in butter B Sugar in blood C Acidity of curd D Purity (density) of milk
53. Question 53 of 100

    The SI unit of electric charge is the

    A Ampere B Volt C Coulomb D Farad
54. Question 54 of 100

    Since 2019, the kilogram has been defined using the

    A Planck constant B Avogadro's number C Speed of light D Charge of electron
55. Question 55 of 100

    The SI unit of illuminance is the

    A Lux B Candela C Lumen D Watt
56. Question 56 of 100

    Radio emissions from the Milky Way were first detected in 1932 by

    A Karl Jansky B Grote Reber C Edwin Hubble D Galileo
57. Question 57 of 100

    The SI unit of plane angle is the radian, and that of solid angle is the

    A Degree B Steradian C Gradian D Candela
58. Question 58 of 100

    A spectroscope is used to

    A Measure current B Analyse light into its spectrum C Measure humidity D Measure speed
59. Question 59 of 100

    One nautical mile equals

    A 1,609 metres B 1,000 metres C 1,852 metres D 2,000 metres
60. Question 60 of 100

    A cyclotron, invented by Ernest Lawrence, is used to

    A Accelerate charged particles B Measure radiation C Detect sound D Produce lasers
61. Question 61 of 100

    A barometer is used to measure

    A Humidity B Atmospheric pressure C Rainfall D Altitude
62. Question 62 of 100

    An odometer measures

    A Speed B Fuel C Distance travelled by a vehicle D Air pressure
63. Question 63 of 100

    0 degrees Celsius is equal to

    A 273.15 K B 0 K C 100 K D 373.15 K
64. Question 64 of 100

    An oscilloscope is used to

    A Measure heat B Measure wind C Display electrical waveforms D Measure pH
65. Question 65 of 100

    One calorie is approximately equal to

    A 1 joule B 4.18 joules C 42 joules D 0.42 joule
66. Question 66 of 100

    One angstrom equals

    A 10^-6 metre B 10^-10 metre C 10^-9 metre D 10^-3 metre
67. Question 67 of 100

    A thermometer is used to measure

    A Pressure B Humidity C Wind speed D Temperature
68. Question 68 of 100

    An ammeter measures

    A Electric current B Voltage C Resistance D Power
69. Question 69 of 100

    A zero error in an instrument is an example of

    A Random error B Systematic error C Gross error only D No error
70. Question 70 of 100

    Standard atmospheric pressure (1 atm) equals

    A 1,000 pascals B 101,325 pascals C 10,000 pascals D 1,013 pascals
71. Question 71 of 100

    A galvanometer is used to

    A Measure large voltage B Measure resistance only C Detect small electric currents D Measure power
72. Question 72 of 100

    An altimeter measures

    A Speed B Depth of sea C Altitude above sea level D Pressure of tyre
73. Question 73 of 100

    An electroscope is used to

    A Measure current B Measure temperature C Detect electric charge D Measure pressure
74. Question 74 of 100

    The loudness of sound is measured in

    A Hertz B Decibels C Watts per ohm D Newtons
75. Question 75 of 100

    The SI unit of magnetic flux density is the

    A Weber B Henry C Gauss D Tesla
76. Question 76 of 100

    An anemometer measures

    A Rainfall B Humidity C Sunshine D Wind speed
77. Question 77 of 100

    Relative error is defined as

    A Absolute error divided by true value B Absolute error times true value C True value divided by absolute error D Sum of all errors
78. Question 78 of 100

    The SI unit of electrical resistance is the

    A Volt B Ohm C Ampere D Farad
79. Question 79 of 100

    The Richter scale measures the

    A Intensity of damage only B Magnitude of an earthquake C Depth of the epicentre D Wind speed
80. Question 80 of 100

    A sextant is used in navigation to measure

    A Speed of ships B Depth of ocean C The angle between the horizon and a celestial body D Wind direction
81. Question 81 of 100

    The SI unit of frequency is the

    A Hertz B Decibel C Watt D Tesla
82. Question 82 of 100

    A microscope is used to see

    A Distant stars B Sound waves C Heat radiation D Very small objects
83. Question 83 of 100

    A periscope works on the principle of

    A Reflection of light B Refraction only C Diffraction D Dispersion
84. Question 84 of 100

    One parsec is about

    A 3.26 light years B 1 light year C 10 light years D 100 light years
85. Question 85 of 100

    A sphygmomanometer measures

    A Blood pressure B Pulse rate C Body temperature D Blood sugar
86. Question 86 of 100

    A pyrometer is used to measure

    A Very low pressures B Humidity C Altitude D Very high temperatures
87. Question 87 of 100

    The circumference of CERN's Large Hadron Collider is about

    A 2.7 km B 270 km C 27 km D 7 km
88. Question 88 of 100

    One nanometre equals

    A 10^-9 metre B 10^-6 metre C 10^-12 metre D 10^-3 metre
89. Question 89 of 100

    The Mach number is the ratio of an object's speed to

    A The speed of light B The speed of sound C The speed of wind D Escape velocity
90. Question 90 of 100

    A telescope is used to observe

    A Microbes B Atoms C Distant objects D Cells
91. Question 91 of 100

    A manometer is used to measure

    A Liquid density B Wind speed C Gas pressure D Time
92. Question 92 of 100

    The SI unit of time is the

    A Minute B Hour C Day D Second
93. Question 93 of 100

    Pakistan's national metrology institute, which maintains national standards, is the

    A Pakistan Meteorological Department B National Physical and Standards Laboratory (NPSL), Islamabad C SUPARCO D National Institute of Health
94. Question 94 of 100

    A hydrophone is used to detect

    A Radio waves B Underwater sound C X-rays D Light
95. Question 95 of 100

    The SI unit of electrical conductance is the

    A Ohm B Henry C Siemens D Weber
96. Question 96 of 100

    The SI unit of temperature is the

    A Celsius B Kelvin C Fahrenheit D Rankine
97. Question 97 of 100

    A voltmeter measures

    A Current B Potential difference C Resistance D Charge
98. Question 98 of 100

    A stethoscope is used to listen to

    A Brain waves B Blood sugar C Eye pressure D Sounds of the heart and lungs
99. Question 99 of 100

    A hydrometer is used to measure the

    A Humidity B Speed of water C Density or specific gravity of liquids D Depth of ocean
100. Question 100 of 100

     One horsepower is equal to about

     A 746 watts B 100 watts C 1,000 watts D 10 watts

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