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 engines are used to propel the submarine on the surface and to charge the batteries. Once submerged, the submarine switches to electric motors powered by the batteries to maintain stealth. This dual system has been the standard for non-nuclear submarines since the early 20th century.
Which Indian submarine was the first to be lost in an accident during peacetime in 2013?
Correct Answer: D. INS Sindhurakshak
INS Sindhurakshak suffered an internal explosion and sank while docked in Mumbai. The accident resulted in the loss of 18 crew members on board. It was a Kilo-class diesel-electric submarine purchased from Russia.
The external structure of a submarine, where the periscopes and antennas are housed, is called the?
Correct Answer: A. Sail (or Fin)
The sail provides a platform for sensors and a bridge for surface navigation. It also helps with directional stability when the submarine is moving underwater. In some designs, it is reinforced to allow the submarine to break through arctic ice.
What is the primary role of a 'DSRV' used by modern navies?
Correct Answer: C. Rescue of distressed submarines
DSRV stands for Deep Submergence Rescue Vehicle. It is designed to dock with a disabled submarine on the ocean floor to evacuate trapped sailors. The Indian Navy acquired its first DSRV system from the United Kingdom in 2018.
Which Indian city houses the 'Kursura Submarine Museum', a decommissioned submarine turned into a museum?
Correct Answer: D. Visakhapatnam
INS Kursura was a Kalvari-class submarine that played a key role in the 1971 Indo-Pak war. After 31 years of service, it was established as a museum on RK Beach in Visakhapatnam. It is the first of its kind in South Asia and remains a popular educational site.
The term 'Hull' refers to which part of the submarine?
Correct Answer: A. The main body/shell
The pressure hull is the inner shell that protects the crew from the crushing weight of the ocean. There is often an outer light hull that provides a streamlined shape for efficient movement. High-tech materials are used to ensure the hull can withstand extreme depths.
Which international treaty limits the deployment and testing of nuclear-armed submarines in certain zones?
Correct Answer: C. Antarctic Treaty
The Antarctic Treaty of 1959 prohibits military activity, including submarine bases, in the Antarctic region. It ensures the continent is used exclusively for peaceful and scientific purposes. Many other regions are governed by similar 'Nuclear-Weapon-Free Zone' treaties.
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 machines break down water molecules into oxygen for the crew to breathe. Scrubbers are also used to remove the carbon dioxide exhaled by the sailors. This life-support system allows nuclear submarines to remain underwater for months at a time.
The 'Sindhughosh Class' submarines of the Indian Navy were primarily acquired from which country?
Correct Answer: A. Russia (Soviet Union)
The correct answer is 'Russia (Soviet Union)'. The Sindhughosh class consists of Kilo-class diesel-electric submarines. They were inducted into the Indian Navy starting in the late 1980s. These submarines are known for their quiet operation and are equipped with anti-ship and anti-submarine torpedoes.
What is the name of the first Indian submarine to be commissioned into the Navy in 1967?
Correct Answer: C. INS Kalvari (S21)
The first INS Kalvari was a Foxtrot-class submarine obtained from the Soviet Union. December 8, the day it was commissioned, is celebrated as 'Submarine Day' in the Indian Navy. This class of submarines served as the backbone of India's early underwater fleet.