General Science(General Knowledge ) Questions and Answers

Question 1. Light year is a measurement of
  1.    Speed of aeroplanes
  2.    Speed of light
  3.    Stellar distances
  4.    Speed of rockets
Explanation:-
Answer: Option C. -> Stellar distances
Light year is a measurement of stellar distances.
Question 2. One kilometer is equal to how many miles?
  1.    0.84
  2.    0.5
  3.    1.6
  4.    0.62
Explanation:-
Answer: Option D. -> 0.62
One kilometer is equal to 0.62 mile.
Question 3. Kilohertz is a unit which measures
  1.    Power used by a current of one ampere
  2.    Electromagnetic radio wave frequencies
  3.    Voltage
  4.    Electric resistance
Explanation:-
Answer: Option B. -> Electromagnetic radio wave frequencies
Kilohertz is a unit which measures electromagnetic radio wave frequencies.
Question 4. One horse power is equal to
  1.    746 watts
  2.    748 watts
  3.    756 watts
  4.    736 watts
Explanation:-
Answer: Option A. -> 746 watts
Electrical equivalent of one horsepower is 746 watts in the International System of Units (SI), and the heat equivalent is 2,545 BTU (British Thermal Units) per hour.
Question 5. Very small time intervals are accurately measured by
  1.    White dwarfs
  2.    Quartz clocks
  3.    Atomic clocks
  4.    Pulsars
Explanation:-
Answer: Option C. -> Atomic clocks
Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.
Question 6. The vast resources of unutilised natural gas can be used in the production of
  1.    Graphite
  2.    Synthetic petroleum
  3.    Fertilisers
  4.    Carbide
Explanation:-
Answer: Option C. -> Fertilisers
The vast resources of unutilised natural gas can be used in the production of fertilisers.
Question 7. Soap is a mixture of sodium or potassium salts of
  1.    Dicarboxylic acids
  2.    Mono-carboxylic acids
  3.    Glycerol
  4.    Tricarboxylic acids
Explanation:-
Answer: Option B. -> Mono-carboxylic acids
Soaps are made from the sodium and potassium salts of long chain carboxylic acids.
Question 8. The type of glass used in making lenses and prisms is
  1.    Jena glass
  2.    Soft glass
  3.    Pyrex glass
  4.    Flint glass
Explanation:-
Answer: Option D. -> Flint glass
In the optical glass industry, flint glass is any highly refractive lead-containing glass used to make lenses and prisms. Because it absorbs most ultraviolet light but comparatively little visible light, it is also used for telescope lenses.
Question 9. Paper is manufactured by
  1.    Wood and resin
  2.    Wood, sodium and bleaching powder
  3.    Wood, calcium, hydrogen sulphide and resin.
  4.    Wood and bleaching powder
Explanation:-
Answer: Option C. -> Wood, calcium, hydrogen sulphide and resin.
Paper is a thin sheet material produced by mechanically and/or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed on the surface, followed by pressing and drying.
Question 10. Gypsum is added to cement clinker to
  1.    Increase the tensile strength of cement
  2.    Decrease the rate of setting of cement
  3.    Facilitate the formation of colloidal gel
  4.    Bind the particles of calcium silicate
Explanation:-
Answer: Option A. -> Increase the tensile strength of cement
During cement manufacturing process upon cooling of clinker a small amount of gypsum is added during the final grinding process. Gypsum controls the setting of the cement and if not added the cement will set immediately leaving no time for concrete placing.
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