Skip to content
Science & Technology 2023

Science and Technology 2023

1. Consider the following statements:

  1. Some microorganisms can grow in environments with temperature above the boiling point of water.
  2. Some microorganisms can grow in environments with temperature below the freezing point of water.
  3. Some microorganisms can grow in a highly acidic environment with a pH below 3.

How many of the above statements are correct?
[UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

2. With reference to green hydrogen, consider the following statements:

  1. It can be used directly as a fuel for internal combustion.
  2. It can be blended with natural gas and used as fuel for heat or power generation.
  3. It can be used in the hydrogen fuel cell to run vehicles.

How many of the above statements are correct? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

3. ‘Wolbachia method’ is sometimes talked about with reference to which one of the following? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

4. ‘Aerial metagenomics’ best refers to which one of the following situations? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

5. ‘Microsatellite DNA’ is used in the case of which one of the following? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

6. Consider the following actions:

  1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously.
  2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive
  3. Detection of the tit of smartphone which results in the rotation of display between portrait and landscape mode

In how many of the above action is the function of accelerometer required? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

7. With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:

  1. Biofilters provide waste treatment by removing uneaten fish feed.
  2. Biofilters convert ammonia present in fish waste to nitrate.
  3. Biofilters increase phosphorus as a nutrient for fish in water.

How many of the statements given above are correct? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

8. Consider the following pairs:

    Objects in space Description

  1. Cepheids – Giant clouds of dust and gas in space
  2. Nebulae – Stars which brighten and dim periodically
  3. Pulsars – Neutron stars that are formed when massive stars run out of fuel and collapse

How many of the above pairs are correctly matched? [UPSC Civil Services Exam – 2023 Prelims]

 
 
 
 

9. Consider the following statements:

  1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket powered only in the initial phase of flight.
  2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

Which of the statements given above is/are correct? [UPSC Civil Services Exam – 2023 Prelims]