Submarines — Set 2
Technology · पनडुब्बियां · Questions 11–20 of 40
Conventional submarines primarily use which combination of power sources?
Correct Answer: C. Diesel and Electric
• **Diesel** = Diesel engines are used to propel the submarine on the surface and to charge the batteries. • **Data/Significance** — This dual system has been the standard for non-nuclear submarines since the early 20th century.. • Wrong-option analysis: A Solar and Nuclear: related but different; B Coal and Steam: related but different; D Wind and Battery: incorrect type.
Which Indian submarine was the first to be lost in an accident during peacetime in 2013?
Correct Answer: D. INS Sindhurakshak
• **INS** = INS Sindhurakshak suffered an internal explosion and sank while docked in Mumbai. • **Data/Significance** — The accident resulted in the loss of 18 crew members on board. • Wrong-option analysis: A INS Vagli: related but different; B INS Kalvari: related but different; C INS Kursura: related but different.
The external structure of a submarine, where the periscopes and antennas are housed, is called the?
Correct Answer: A. Sail (or Fin)
• **The** = The sail provides a platform for sensors and a bridge for surface navigation. • **Data/Significance** — It also helps with directional stability when the submarine is moving underwater. • Wrong-option analysis: B Deck: incorrect type; C Keel: incorrect type; D Rudder: incorrect type.
What is the primary role of a 'DSRV' used by modern navies?
Correct Answer: C. Rescue of distressed submarines
• **DSRV** = DSRV stands for Deep Submergence Rescue Vehicle. • **Data/Significance** — The Indian Navy acquired its first DSRV system from the United Kingdom in 2018.. • Wrong-option analysis: A Laying mines: related but different; B Deep-sea mining: related but different; D Launching satellites: incorrect type.
Which Indian city houses the 'Kursura Submarine Museum', a decommissioned submarine turned into a museum?
Correct Answer: D. Visakhapatnam
• **INS** = INS Kursura was a Kalvari-class submarine that played a key role in the 1971 Indo-Pak war. • **Data/Significance** — INS Kursura was a Kalvari-class submarine that played a key role in the 1971 Indo-Pak war. • Wrong-option analysis: A Mumbai: related but different; B Chennai: related but different; C Kochi: related but different.
The term 'Hull' refers to which part of the submarine?
Correct Answer: A. The main body/shell
• **The** = The pressure hull is the inner shell that protects the crew from the crushing weight of the ocean. • **Data/Significance** — There is often an outer light hull that provides a streamlined shape for efficient movement. • Wrong-option analysis: B The propeller: incorrect type; C The kitchen area: incorrect type; D The communication system: incorrect type.
Which international treaty limits the deployment and testing of nuclear-armed submarines in certain zones?
Correct Answer: C. Antarctic Treaty
• **The** = The Antarctic Treaty of 1959 prohibits military activity, including submarine bases, in the Antarctic region. • **Data/Significance** — The Antarctic Treaty of 1959 prohibits military activity, including submarine bases, in the Antarctic region. • Wrong-option analysis: A Kyoto Protocol: related but different; B Montreal Protocol: related but different; D Geneva Convention: incorrect type.
Which gas is vital to maintain for the crew's survival in a submerged submarine and is often produced using electrolysis?
Correct Answer: D. Oxygen
• **Electrolysis** = Electrolysis machines break down water molecules into oxygen for the crew to breathe. • **Data/Significance** — Scrubbers are also used to remove the carbon dioxide exhaled by the sailors. • Wrong-option analysis: A Nitrogen: related but different; B Carbon Dioxide: related but different; C Hydrogen: related but different.
The 'Sindhughosh Class' submarines of the Indian Navy were primarily acquired from which country?
Correct Answer: A. Russia (Soviet Union)
• **The** = The correct answer is 'Russia (Soviet Union)'. • **Data/Significance** — They were inducted into the Indian Navy starting in the late 1980s. • Wrong-option analysis: B USA: incorrect type; C France: incorrect type; D Germany: incorrect type.
What is the name of the first Indian submarine to be commissioned into the Navy in 1967?
Correct Answer: C. INS Kalvari (S21)
• **The** = The first INS Kalvari was a Foxtrot-class submarine obtained from the Soviet Union. • **Data/Significance** — December 8, the day it was commissioned, is celebrated as 'Submarine Day' in the Indian Navy. • Wrong-option analysis: A INS Arihant: related but different; B INS Vagli: related but different; D INS Chakra: incorrect type.