500+ RRB NTPC BEST Questions 2024 General Awareness

Q1. How many basic S.I. units are there?

Answer: Seven

Q2. What is the principle on which a transformer works?

Answer: Mutual Induction

Q3. The distance between Earth and Sun is termed as –

Answer: 1 Astronomical unit

Q4. Potential energy of your body is minimum when you __.

Answer: Lie down on ground

Q5. What is the freezing point (temperature) of Pure water?

Answer: 32 F

Q6. What is the unit of measurement of an Angle?

Answer: Radian

Q7. Radio waves of constant amplitude can be generated with an __.

Answer: Oscillator

Q8. Hooke’s law is related to

Answer: Elasticity

Q9. Sudden fall in barometer is indication of __.

Answer: Storm

Q10. Water moving up a straw is an example of __.

Answer: Capillary Action

Q11. The blue colour of the clear sky is due to __.

Answer: Dispersion of Light

Q12. What is a magnetic field’s direction within a magnet?

Answer: From South to North

Q13. The experiment demonstrating the existence of electromagnetic wave was first conducted by

Answer: Heinrich Hertz

Q14. The filament string in an electric bulb is made of which metal?

Answer: Tungsten

Q15. Drag is the __ force exerted by fluids.

Answer: Friction

Q16. The hydraulic brake used in automobiles is a direct application of __.

Answer: Pascal’s Law

Q17. The image formed by convex lens in a simple microscope is __.

Answer: Virtual & Erect

Q18. What kind of mirror is used in motor vehicles near the driver’s seat?

Answer: Convex Mirror

Q19. _____&_____ are present in the nucleus of an atom.

Answer: Neutrons and protons

Q20. From the moon’s surface, Astronauts see a Black Sky. This is because of __.

Answer: Absence of Atmosphere on Moon

Q21. The specific resistance of a wire varies with its __.

Answer: Material

Q22. The speed of light will be decreased with the rise in the temperature of the medium. True or False.

Answer: False. (It remains unchanged)

Q23. Which is the strongest force in the nature?

Answer: Nuclear Force

Q24. Which device is used to measure the temperature of the sun?

Answer: Pyrometer

Q25. Which phenomenon occurs when light passes from a denser to rarer medium?

Answer: Total Internal reflection

Q26. Which substances do not allow flow of charge through them?

Answer: Insulators

Q27. The value of which quantity remains same in all system of units?

Answer: Specific Gravity

Q28. What is the speed of sound in air?

Answer: 332m/sec

Q29. The working of the quartz crystal in the watch is based on which effect?

Answer: Piezoelectric Effect

Q30. Permanent magnets are made of ____.

Answer: Steel

Q31. During a fog, the visibility is reduced,This is because of which phenomenon?

Answer: Scattering of light

Q32. Weightlessness experienced in a spaceship is due to __.

Answer: Absence of Gravity

Q33. Which device is used to find submerged objects?

Answer: SONAR

Q34. What converts the alternating current into direct current?

Answer: Rectifier

Q35. Which element is used as a moderator in nuclear reactors?

Answer: Graphite

Q36. Which device converts light energy into electric energy?

Answer: Photoelectric cell

Q37. The unit of power of lens is called ______?

Answer: Dioptre

Q38. What is the unit of Radioactivity?

Answer: Curie

Q39. An object has to attain the velocity of____ to escape from earth’s atmosphere?

Answer: 11.2 km/sec

Q40. What is the measuring unit of length of light waves?

Answer: Angstrom

Q41. A short duration wave is known as –

Answer: Pulse

Q42. When did Einstein propose that matter can be converted into energy?

Answer: 1905

Q43. What is the SI unit of luminous intensity?

Answer: Candela

Q44. What is the unit of magnetic flux?

Answer: Maxwell

Q45. What is the unit of specific resistance?

Answer: Ohm-metre

Q46. The wavelength of visible spectrum ranges from __.

Answer: 390-700 nanometres

Q47. A Washing machine works on the principle of –

Answer: Centrifugation

Q48. When a ball is thrown upward, what happens to its Acceleration?

Answer: It remains Constant

Q49. Magnifying glass is made of which type of lens?

Answer: Convex lens

Q50. What colour will a red glass appear if it is heated in dark room?

Answer: Green

Q51. What happens to the surface tension of the water when a detergent is added to it

Answer: Decreases

Q52. The value of ‘g’ (acceleration due to gravity) is maximum at __?

Answer: at poles

Q53. Which instrument is used to measure altitudes in aircrafts?

Answer: Altimeter

Q54. Which instrument is used to measure change in volume of substances ?

Answer: Dilatometer

Q55. Which instrument is used to measure depth of ocean ?

Answer: Fathometer

Q56. The power of electric circuit is measured with a __.

Answer: Wattmeter

Q57. Which instrument is used to measure the scattering of light by particles suspended in a liquid?

Answer: Nephelometer

Q58. Which is more elastic – Steel or Rubber?

Answer: Steel

Q59. Which is the only natural magnet?

Answer: Magnetite

Q60. What Principle is used in the designing of ships and submarines?

Answer: Archimedes Principle

Q61. Nuclear Fissions are initiated by ____.

Answer: Neutrons

Q62. The wire in an electric heater is made up of ____.

Answer: Nichrome

Q63. During Sonography which types of Waves are used?

Answer: Ultrasonic waves

Q64. Diode Bulb was discovered by __.

Answer: Sir J. S. Fleming

Q65. Who gave the first experimental value of G?

Answer: Cavendish

Q66. Who had showed that the electric and magnetic waves are equal in vacuum?

Answer: James Clerk Maxwell

Q67. What is the escape velocity of Moon?

Answer: 2.38 Km/s

Q68. Why does a liquid drop tend to assume a spherical shape?

Answer: To minimize surface tension

Q69. Resistance of a Conductor is inversely proportional to it’s _.

Answer: Cross Sectional Area

Q70. What is used in nuclear reactor as a moderator. It is also known as Heavy Water?

Answer: Deuterium Oxide (D2O)

Q71. Which Metal is in liquid state at room temperature?

Answer: Gallium

Q72. _____ elements are non-metal?

Answer: Electro-negative

Q73. What is known as Artificial Silk.

Answer: Rayon

Q74. Nitrous Oxide (N2O) is also known as –

Answer: Laughing Gas

Q75. Which compound is used to prepare water proof clothes?

Answer: Calcium hydride

Q76. Which Nobel Gas is also known as ‘Stranger Gas’?

Answer: Xenon

Q77. Which Acid is know as ‘Oil of Vitriol’?

Answer: : Sulphuric acid

Q78. For making of parachute, which polymeric substance used?

Answer: Viscose

Q79. Acid rain is caused when the air is polluted by __ Gases.

Answer: Nitrous Oxide & Sulphur dioxide

Q80. All noble gases are _____&______.

Answer: Colourless and Odourless

Q81. ___ is used as a Water Purifier.

Answer: Alum

Q82. Aluminium is extracted from which ore?

Answer: Bauxite

Q83. The __ Process is used to synthesized Ammonia (NH3)?

Answer: Haber’s Process

Q84. Which compound/acid commonly known as Aspirin?

Answer: Acetylsalicylic Acid

Q85. _____ gas used to fill Balloons.

Answer: Helium

Q86. ____ is also known as Baryta Water?

Answer: Barium Hydroxide

Q87. Best sources for Vitamin D are –

Answer: Sunlight & Fish liver

Q88. Which gas is the chief component of Bio-gas?

Answer: Methane

Q89. ____ is the purest form of Carbon found in Nature.

Answer: Diamond

Q90. The Chemical name of ‘Washing Soda’ is –

Answer: Sodium Carbonate

Q91. What is the Chemical name of Chromic Acid?

Answer: Chromium trioxide

Q92. Chemical name of Picric Acid is –

Answer: Tri Nitro Phenol

Q93. In Photography, which chemical used as a fixer.

Answer: Sodium thiosulphate

Q94. What are used to control the chain reaction in a nuclear reactor?

Answer: Cadmium rods

Q95. In sunlight, Chloroform is converted into _____, a poisonous gas.

Answer: Phosgene

Q96. Which Vitamin contains Cobalt?

Answer: Vitamin B12

Q97. ____ is one of the most common preservatives used in food processing industry?

Answer: Benzoic Acid

Q98. Which compounds are responsible for permanent hardness of water?

Answer: Sulphates and Chlorides of Calcium and Magnesium

Q99. The temporary hardness of water is caused of because of which compounds?

Answer: Bicarbonates of Calcium and Magnesium

Q100. Copper is extracted from which ore?

Answer: Copper Pyrite