UPSC Essentials | Daily subject-wise quiz : Science and Technology MCQs on Atomic clocks, OSIRIS-REx mission and more (Week 154) | UPSC Current Affairs News

3. Atomic Clock achieves stability through the use of germanium ions.

How lots of the statements given above are right?

(a) Only one

(b) Only two

(c) All three

(d) None

Relevance: Precision devices like Atomic clocks are vital in Science & Technology, particularly in navigation and communication methods. UPSC can body questions to check understanding of scientific rules and right examples of applied sciences.

Explanation:

— India’s regional navigation system has been plagued by problems affecting its positioning data. The Indian Space Research Organisation (ISRO) on Friday (March 13) informed that the atomic clock of one of the five remaining satellites that were still providing this data stopped working — which means positioning knowledge from the satellite tv for pc IRNSS-1F was additionally misplaced.

— Atomic clocks mix a quartz crystal oscillator with an ensemble of atoms to realize better stability. Hence, assertion 1 is right.

— In an atomic clock, the frequency of the quartz oscillator is reworked right into a frequency that’s utilized to a group of atoms. If the derived frequency is right, it is going to trigger many electrons within the atoms to alter vitality ranges. If the frequency is wrong, far fewer electrons will leap. This will decide if the quartz oscillator is off-frequency and by how a lot. A “correction” decided by the atoms can then be utilized to the quartz oscillator to steer it again to the proper frequency.

— Atomic clocks are used onboard GPS satellites that orbit the Earth. Up to 50 instances more steady than the atomic clocks on GPS satellites, NASA’s Deep Space Atomic Clock is meant to be probably the most steady atomic clock ever flown in area. It achieves this stability through the use of mercury ions. Hence, assertion 2 is right and assertion 3 just isn’t right.

Therefore, possibility (b) is the proper reply.

(Other Source: http://www.nasa.gov)

QUESTION 2

With reference to the Very Low Earth Orbit (VLEO), take into account the next statements:

1. It is comparatively protected from collisions with area particles.

2. Satellites working on this vary present superior imaging and decrease latency for 6G.

Which of the statements given above is/are right?

(a) 1 solely

(b) 2 solely

(c) Both 1 and 2

(d) Neither 1 nor 2

Relevance: Emerging domains like Very Low Earth Orbit are vital underneath Science & Technology, particularly with rising satellite tv for pc launches and non-public area exercise. UPSC can ask conceptual questions linking orbit varieties with their functions and benefits.

Explanation:

— Very Low Earth Orbit (VLEO), located at an altitude between 100 and roughly 450 km (mostly 250-350 km) is turning into more and more enticing for each industrial and scientific endeavours.

— VLEO is comparatively protected from collisions with area particles, as objects naturally decay and re-enter Earth’s environment at an accelerated charge on account of residual drag. Hence, assertion 1 is right.

— Satellites working on this vary present superior imaging and decrease latency for 6G. Hence, assertion 2 is right.

— However, working at such altitudes comes with challenges, corresponding to shortened lifespans on account of residual environment, lively orbit upkeep, floor erosion from atomic oxygen and brief communication home windows.

Therefore, possibility (c) is the proper reply.

(Source: http://www.esa.int)

QUESTION 3

With reference to the Deep Ocean Mission, take into account the next statements:

1. It was launched in 2024.

2. It focusses on sustainably harnessing ocean wealth and strengthening the Blue Economy.

3. The United Nations named the 2021-2030 decade because the ‘Decade of Ocean Science for Sustainable Development’.

4. India’s first manned submersible car ‘MATSYA 6000’ is being developed as a part of the Samudrayaan Project underneath Deep Ocean Mission.

How lots of the statements given above are right?

(a) Only one

(b) Only two

(c) Only three

(d) All 4

Relevance: The Deep Ocean Mission is a key initiative underneath India’s push for the Blue Economy, making it vital for Prelims. It connects with themes like ocean assets, marine expertise, and sustainable improvement, steadily requested in Science & Tech and Geography.

Explanation:

— Deep Ocean Mission, launched in 2021, focusses on sustainably harnessing ocean wealth and strengthening the Blue Economy. Hence, assertion 1 just isn’t right and assertion 2 is right.

— India’s first manned submersible car ‘MATSYA 6000’ is being developed as a part of the Samudrayaan Project underneath Deep Ocean Mission. Hence, assertion 4 is right.

— The Deep Ocean Mission was launched on 07.09.2021 by the Ministry of Earth Sciences (MoES) with an purpose to develop applied sciences for exploring and sustainably using the deep ocean’s residing and non-living wealth.

— The United Nations named the 2021-2030 decade because the ‘Decade of Ocean Science for Sustainable Development’. India’s distinctive geography, with 7517 km of shoreline, 9 coastal states, and 1382 islands, provides it an edge within the sector. Hence, assertion 3 is right.

Therefore, possibility (c) is the proper reply.

(Source: http://www.pib.gov.in)

QUESTION 4

With reference to the OSIRIS-REx mission, take into account the next statements:

1. The mission was launched by Nasa in collaboration with the European Space Agency.

2. The mission focused the Trojan Asteroids.

Which of the statements given above is/are right?

(a) 1 solely

(b) 2 solely

(c) Both 1 and 2

(d) Neither 1 nor 2

Relevance: Space missions like OSIRIS-REx are steadily requested in Prelims underneath Science & Technology (area sector). It hyperlinks static ideas with present developments in asteroid exploration, planetary science, and area competitors.

Explanation:

— OSIRIS-REx is the first U.S. mission to gather a pattern from an asteroid. It returned to Earth on Sept. 24, 2023, to drop off a capsule with materials from asteroid Bennu. Hence, statements 1 and 2 are usually not right.

— After dropping off the pattern capsule by means of Earth’s environment, the spacecraft was renamed OSIRIS-APEX and despatched on a brand new mission to discover asteroid Apophis in 2029.

Therefore, possibility (d) is the proper reply.

(Source: science.nasa.gov)

QUESTION 5

Consider the next statements about ‘HbA1c’:

1. It is a blood take a look at that reveals your common blood sugar ranges over the previous two to 3 months.

2. An HbA1c above 5.7 per cent is taken into account regular.

3. It is often used to evaluate long-term glucose management in people already recognized with diabetes.

Which of the statements given above is/are right?

(a) 1 and 2 solely

(b) 2 solely

(c) 1 and 3 solely

(d) 2 and 3 solely

Relevance: With the rising burden of Diabetes Mellitus in India, understanding diagnostic instruments like HbA1c is vital for public well being consciousness. It hyperlinks static ideas with present affairs associated to authorities well being initiatives and screening applications.

Explanation:

— Both HbA1c and fasting blood glucose are important tests, but they serve different purposes in understanding blood sugar levels.

— HbA1c is an easy blood take a look at that reveals your common blood sugar ranges over the previous two to 3 months. An HbA1c under 5.7 per cent is taken into account regular. A price between 5.7 per cent and 6.4 per cent signifies prediabetes. An HbA1c of 6.5 per cent or increased, confirmed by two separate exams, is a analysis of diabetes. Hence, assertion 1 is right and assertion 2 just isn’t right.

— The typical goal is to maintain HbA1c under 7 per cent, though this will differ based mostly on age.

— Consistently excessive HbA1c ranges are linked to long-term problems affecting the eyes, kidneys, nerves, and coronary heart.

— HbA1c is often used to evaluate long-term glucose management in people already recognized with diabetes. It helps medical doctors see whether or not blood sugar ranges have been persistently excessive, even when a single fasting take a look at seems regular. Hence, assertion 3 is right.

Therefore, possibility (c) is the proper reply.

Topic: War within the Middle East – Where is it headed, and what occurs now

What is the endgame?

Is US & Israel justified in attacking Iran?

What is occurring inside Iran?

What will probably be new Supreme Leader Mojtaba Khameini’s technique?

How does west Asia view the warfare?

How is India’s place on the warfare perceived by completely different nations?

How far is it going to affect India’s economic system and its diaspora within the area?

Join us within the subsequent version of Explained.Live with Navdeep Suri, Former Indian Ambassador to UAE & Egypt in dialog with Shubhajit Roy, Diplomatic Editor, The Indian Express

Register now: https://zoom.us/webinar/register/9017733199890/WN_GLNpxRb6SqyjNrW4Ut81Mg

March 19, 2026 | 5:30 PM | Zoom

Previous Daily Subject-Wise-Quiz

Daily Subject-wise quiz — History, Culture, and Social Issues (Week 149)

Daily subject-wise quiz — Polity and Governance (Week 154)

Daily subject-wise quiz —  Science and Technology (Week 153)

Daily subject-wise quiz — Economy (Week 153)

Daily subject-wise quiz — Environment and Geography (Week 153)

Daily subject-wise quiz – International Relations (Week 153)

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