Most Important Question For Prelims 2021-Science and Technology

Q1.NASA and a trio of international partners have signed a statement of intent to advance a robotic Mars ice mapping mission. Consider the following statements regarding this: 

1. It would detect the location and abundance of near-surface ice deposits of Mars 

2. Its approach is similar to NASA’s Artemis program of sending astronauts to Moon. 

3. Other space agencies participating in the project includes Swedish National Space Agency, Roscosmos and Japan Aerospace Exploration Agency (JAXA). 

Which of the above statements is/are correct? 

(a) 1 and 2 only 

(b) 2 only 

(c) 1 only 

(d) 1, 2 and 3 

Correct Option: (a) 

Explanation: Statement 3 is incorrect: Other agencies involved are the Italian Space Agency (ASI), the Canadian Space Agency (CSA), and the Japan Aerospace Exploration Agency (JAXA).

Q2.With respect to Korea Superconducting Tokamak Advanced Research (KSTAR), consider the following statements: 

1. It is North Korea’s magnetic fusion device. 

2. The KSTAR has achieved temperature of over 6.6 times more than that of Sun’s. 

Which of the above statements is/are correct? 

(a) 1 only 

(b) 2 only 

(c) Both 1 and 2 

(d) Neither 1 nor 2

Correct Option: (b) 

Explanation: Statement 1 is incorrect: It is South Korea’s magnetic fusion device

Q3. Researchers at Shiv Nadar University in partnership with the Indian Institute of Technology-Bombay have developed a lithium sulfur (Li-S) battery technology. 

Consider the following statements regarding this: 

1. The batteries incorporate petroleum industry by-products and Agro-waste elements. 

2. They are cost-effective, energy efficient and eco-friendly. Which of the above statements is/are correct? 

(a) 1 only 

(b) 2 only 

(c) Both 1 and 2 

(d) Neither 1 nor 2

Correct Option: (c) 

Explanation: Both statements are correct

Q4. Scientists from Bangalore have developed a highly reliable High Electron Mobility Transistor (HEMTs). Which of the following statements is not correct regarding this? 

(a) It is first-ever indigenous HEMT device made from gallium nitride 

(b) It is useful in electric cars and power transmission and other areas requiring high voltage and low-frequency switching. 

(c) It is supported by the Department of Science & Technology (DST) under the ‘Make in India’ initiative 

(d) None of the above.

Correct Option: (b) 

Explanation: Option (b) is correct

Q5.Which of the following functions are based on GPS technology? 

1. Widespread availability of atomic clock time, without the atomic clocks. 

2. Accurate positioning of physical features that can be used in maps and models. 

3. Precision soil sampling and accurately monitored yield data. 

4. Accurate tracking of environmental disasters such as fi res and oil spills can be conducted more efficiently. 

Select the correct answer using the codes given below: 

(a) 1 and 2 only 

(b) 2, 3 and 4 only 

(c) 1, 3 and 4 only 

(d) 1, 2, 3 and 4

Correct Option: (d) 

Explanation: All statements are correct

Q6. Consider the following statements regarding the Pneumococcal conjugate vaccine (PCV): 

1. It is used to protect infants, young children, and adults against disease caused by virus Streptococcus pneumoniae (pneumococcus). 

2. This is the first indigenously developed vaccine in the field of pneumonia. 

Which of the above statements is/are correct? 

(a) 1 only 

(b) 2 only 

(c) Both 1 and 2 

(d) Neither 1 nor 2

Correct Option: (b) 

Explanation: Statement 1 is incorrect: This disease is caused by the bacterium Streptococcus pneumoniae (pneumococcus)

Q7.Consider the following statements regarding 3-D Printing:

1. It can use a variety of materials like metals, plastics, ceramics and polymers. 

2. Physicians and medical technicians can use 3D printing to make prosthetics, hearing aids and artificial teeth. 3. Currently, 3D printing cannot be used in food preparation. 

Which of the above statements is/are correct? 

(a) 1 only 

(b) 1 and 3 only 

(c) 1 and 2 only 

(d) 3 only

Correct Option: (c) 

Explanation: Statement 3 is incorrect: Food preparation is another way 3D printers can be used.

Q8.Which of the following statements regarding the types of Satellite Launch Vehicles in India is correct? 

(a) GSLV is the first Indian launch vehicle to be equipped with liquid stages. 

(b) GSLV is also known as ‘the Workhorse of ISRO’. 

(c) Both Chandrayaan-1 and Mars Orbiter Spacecraft were launched by PSLV-XL. 

(d) None of the above

Correct option: (c) 

Explanation: Option (c) is correct

Q9.Recently, scientists launched one of the world’s biggest underwater neutrino telescopes. Consider the following statements regarding this: 

1. It was launched by Russian scientists in the Arctic Ocean. 

2. Study of neutrinos aid in the understanding of the origins of the universe. 

Which of the above statements is/are incorrect ? 

(a) 1 only 

(b) 2 only 

(c) Both 1 and 2 

(d) Neither 1 nor 2 

Correct Option: (a) 

Explanation: Statement 1 is incorrect: It was launched by Russian scientists in the waters of Lake Baikail

Q10. The Chaff Technology has been in news recently. Consider the following statements regarding the same: 

1. Chaff is an electronic counter-measure technology used to protect naval ships from enemy’s radar. 

2. It is indigenously developed by DRDO.

Which of the above statements is/are correct? 

(a) 1 only 

(b) 2 only 

(c) Both 1 and 2 

(d) Neither 1 nor 2

Correct Option: (c) 

Explanation: Both statements are correct