Science and Technology (Part-I)

Total Questions: 50

21. The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilo metres long, with lasers shining between the craft." The experiment in question refers to : [2020-1]

(a) Voyager-2
(b) New Horizons
(c) LISA Pathfinder
(d) Evolved LISA

Correct Answer: (d) Evolved LISA

Solution:The experiment described in the given statement refers to the Evolved Laser Interferometer Space Antenna (ELISA), also known as NGO (Next Generation Observatory) or LISA Pathfinder. It is a space-based gravitational wave observatory, which aims to detect and study gravitational waves. The experiment involves three spacecraft flying in a triangular formation, with lasers passing between them to measure the distortion of space-time caused by gravitational waves. This experiment is expected to be more sensitive than the Laser Interferometer Gravitational-Wave Observatory (LIGO), which detected gravitational waves in 2015.

22. Consider the following pairs: [2023-1]

1. Cepheids : Giant clouds of dust and gas in sapce

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?

(a) Only one
(b) Only two
(c) All three
(d) None

Correct Answer: (a) Only one

Solution:The correct answer is (a). St 1 is wrong. Cepheid variable stars are just stars which are visible to us from the earth that are many times larger than the sun itself.

St 2 is wrong. Nebulae: A nebula is a giant cloud of dust and gas in space.

St 3 right. Pulsars are neutron stars that are formed when massive stars run out of fuel and collapse. The collapse of the star's core creates a very strong magnetic field, which causes the neutron star to emit beams of radiation.

A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. For this reason, some nebulae are called "star nurseries."

23. Which one of the following countries has its own Satellite Navigation System? [2023-1]

(a) Australia
(b) Canada
(c) Israel
(d) Japan

Correct Answer: (d) Japan

Solution:Japan has its own satellite navigation system called the Quasi-Zenith Satellite System (QZSS). It is a four-satellite regional time transfer system and a satellite navigation system. It is designed to enhance the Global Positioning System (GPS) in the Asia-Oceania region.

Australia, Canada, and Israel do not have their own Satellite Navigation Systems.

24. Consider the following statements: [2007]

1. In November, 2006, DRDO successfully conducted the interception test using Prithvi-II missile.

2. Pithivier-II is a surface-to-surface missile and can be deployed to guard the metros against air attacks.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (c) Both 1 and 2

Solution:Prithvi Air Defence((PAD) missile was tested in November 2006, followed by AAD in December 2007. With the test of the PAD missile, India became the fourth country to have successfully developed an Anti-ballistic missile system, after United States, Russia, and Israel. On 6 March 2009, India again successfully tested its missile defence shield, during which an incoming "enemy" missile was intercepted at an altitude of 75 km. Prithvi is a tactical surface-to-surface short-range ballistic missile (SRBM) developed by DRDO of India under the Integrated Guided Missile Development Program (IGMDP). lt is also a single-stage liquid-fuelled missile having a maximum warhead mounting capability of 500 kg, but with an extended range of 250 km (160 mi).

25. What is the Galileo Project which has been in news recently? [2007]

(a) An intercountry programme of missile shield developed by the United States of America
(b) A project developed by India with assistance from Canada
(c) An environmental protection project being developed by Japan
(d) A multi-satellite navigation project being developed by the European Union

Correct Answer: (d) A multi-satellite navigation project being developed by the European Union

Solution:Galileo is the global navigation satellite system (GNSS) that is currently being created by the European Union (EU) and the European Space Agency (ESA).

26. From which one of the following did India buy the Barak anti-missile defence systems? [2008]

(a) Israel
(b) France
(c) Russia
(d) USA

Correct Answer: (a) Israel

Solution:Barak is an Israeli surface-to-air missile (SAM) designed to be used as a ship-borne point-defense missile system against aircraft, anti-ship missiles, and UAVs. India and Israel jointly developed and produced it.

27. In the context of the Indian defence, what is 'Dhruv"? [2008]

(a) Aircraft-carrying warship
(b) Missile-carrying submarine
(c) Advanced light helicopter
(d) Intercontinental ballistic missile

Correct Answer: (c) Advanced light helicopter

Solution:Hindustan Aeronautics Limited (HAL) has developed the Dhruv advanced light helicopter (ALH), a light (5.5t class) multirole and multimission helicopter for army, air force, navy, coastguard and civil operations for both utility and attack roles by day and night.

28. In the context of Indian defence, consider the following statements: [2009]

1. The Shourya missile flies with a speed of more than 8 Mach.

2. The range of Shourya missile is more than 1600 km.

Which of the statements given above is/are correct?

(a) I only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (d) Neither 1 nor 2

Solution:The missile flew at 7.5 Mach, that is 7.5 times the speed of sound and covered its full range of 700 km in 500 seconds. These ballistic missiles belong to the K missile family codenamed after late Dr. APJ Abdul Kalam which are launched from Arihant class of nuclear submarines.

The K family of missiles are primarily Submarine Launched Ballistic Missiles (SLBMs).

These have been indigenously developed by Defence Research and Development Organisation (DRDO).

29. Consider the following statements: [2009]

1. INS Sindhu Ghosh is an aircraft carrier.

2. INS Virat is a submarine.

Which of the statements given above is/are correct?

(a) I only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (d) Neither 1 nor 2

Solution:INS Sindhughosh ($55) is the lead ship of her class of diesel-electric submarines of the Indian Navy. INS Viraat is a Centaur-class aircraft carrier in service with the Indian Navy.

30. With reference to Agni-IV Missile, which of the following statements is/are correct? [2014-1]

1. It is a surface-to-surface missile.

2. It is fuelled by liquid propellant only

3. It can deliver one-tonne nuclear warheads about 7500 km away

Select the correct answer using the code given below.

(a) I only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Correct Answer: (a) I only

Solution:Agni IV is a surface-to-surface missile. It is fuelled by solid propellant. It can deliver one-tonne nuclear warheads about 4000 km away.

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Science and Technology (Part-I)

21. The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilo metres long, with lasers shining between the craft." The experiment in question refers to : [2020-1]

22. Consider the following pairs: [2023-1]

23. Which one of the following countries has its own Satellite Navigation System? [2023-1]

24. Consider the following statements: [2007]

25. What is the Galileo Project which has been in news recently? [2007]

26. From which one of the following did India buy the Barak anti-missile defence systems? [2008]

27. In the context of the Indian defence, what is 'Dhruv"? [2008]

28. In the context of Indian defence, consider the following statements: [2009]

29. Consider the following statements: [2009]

30. With reference to Agni-IV Missile, which of the following statements is/are correct? [2014-1]

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