Daily Static MCQs Quiz for UPSC, IAS, UPPSC/UPPCS, MPPSC. BPSC, RPSC & All State PSC Exams
Subject : Science and Technology
1. Consider the following statements regarding Air-independent propulsion:
1. It is a technology which allows a non-nuclear submarine to
operate by using the atmospheric oxygen.
2. It is based on the combustion of oxygen and ethanol to augment
battery-powered propulsion.
3. The Non-nuclear submarines running on Air-independent propulsion can be
virtually silent.
How many of the above statements is/are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Answer: (B)
Explanation:
- Air-independent propulsion is a technology which allows a non-nuclear submarine to operate without the need to access atmospheric oxygen (by surfacing or using a snorkel). Hence, statement 1 is incorrect.
- It can augment or replace the diesel-electric propulsion system of non-nuclear vessels. It is based on the combustion of stored oxygen and ethanol to augment battery-powered propulsion. Hence, statement 2 is correct.
- AIP significantly improves stealth because it enables a submarine to generate electricity for services and battery charging and propulsion while completely submerged. AIP systems also generate electricity, powering a submarine to operate and also generate oxygen, lighting and amenities for crew. The Non-nuclear submarines running on battery power or AIP can be virtually silent. Hence, statement 3 is correct.
2. The Earth Observation Satellites have applications in which of the following areas?
1. Ocean resource management
2. Mineral prospecting
3. Disaster management
4. Urban planning
Select the correct answer using the code given below:
(a) 1, 2 and 3 only
(b) 2, 3 and 4 only
(c) 1, 3 and 4 only
(d) All of the above
Answer: (D)
Explanation: The data from these satellites are used for several applications covering agriculture, water resources, urban planning, rural development, mineral prospecting, environment, forestry, ocean resources and disaster management. Hence, option (d) is correct.
3. Consider the following statements regarding non-fungible token (NFT):
1. NFTs are unique digital assets with each token
representing a unique value.
2. NFTs include digital real estate, digital art and music.
3. NFT is not interchangeable in nature.
How many of the above statements is/are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Answer: (C)
Explanation: NFT is a one-of-its-kind asset that is not interchangeable in nature. It means that the NFT is not replaceable by another ‘identical’ item. For example, if two individuals hold a bitcoin each, they can exchange their bitcoins, which are a replica of each other and have the same value. However, NFTs are not interchangeable, as they are more like pieces of art where each and every token is unique in itself. While bitcoins are also digital assets, NFTs are unique digital assets with each token representing a unique value. NFTs have evolved to include digital real estate, video game items, digital art and music. Hence, all statements are correct.
4. Consider the following statements regarding Nuclear magnetic resonance spectroscopy (NMR):
1. Nuclear magnetic resonance spectroscopy (NMR) technique is
used for determining the structure of organic compounds.
2. Due to its electromagnetic radiation, it cannot be used to test the
adulterants in food.
Which of the above statements is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer: (A)
Explanation: Nuclear magnetic resonance spectroscopy (NMR) is the most powerful technique for determining the structure of organic compounds. NMR techniques are used successfully in various food systems for quality control and research. Hence, statement 2 is incorrect.
5. The term ‘Grey Zone Operations’ is associated with:
(a) Non-Proliferation of Nuclear Weapons
(b) Early warning system of tropical storms
(c) Cyber Warfare
(d) Strategic intervention to prevent malnutrition
Answer: (C)
Explanation: ‘Grey Zone Operations’ which fall outside traditional concepts of conflicts have become the new battleground, especially in regard to cyber warfare. ‘Grey Zone Operations’ are already beginning to be employed to undermine the vitals of a state’s functioning, a trend likely to grow. The convergence of emerging technologies alongside new hybrid usages, pose several challenges to nations and institutions. Hence, option (c) is correct.
