Submarines — Set 1
Technology · पनडुब्बियां · Questions 1–10 of 40
What is the primary physical principle that allows a submarine to control its buoyancy and submerge in water?
Correct Answer: A. Archimedes' Principle
• **Archimedes'** = Archimedes' Principle states that the upward buoyant force is equal to the weight of the fluid displaced. • **Data/Significance** — Submarines use ballast tanks to change their density and weight to submerge or float. • Wrong-option analysis: B Newton's First Law: incorrect type; C Pascal's Law: incorrect type; D Bernoulli's Principle: incorrect type.
The first indigenous nuclear-powered ballistic missile submarine of India is named?
Correct Answer: C. INS Arihant
• **INS** = INS Arihant was commissioned into the Indian Navy in 2016. • **Data/Significance** — INS Arihant was commissioned into the Indian Navy in 2016. • Wrong-option analysis: A INS Kalvari: related but different; B INS Chakra: related but different; D INS Khanderi: incorrect type.
In submarine terminology, what does the acronym 'AIP' stand for?
Correct Answer: D. Air-Independent Propulsion
• **Air-Independent** = Air-Independent Propulsion allows non-nuclear submarines to operate without access to atmospheric oxygen. • **Data/Significance** — This technology significantly increases the underwater endurance of conventional diesel-electric submarines. • Wrong-option analysis: A Automatic Internal Power: related but different; B Atmospheric Input Process: related but different; C Advanced Ion Pressure: related but different.
Which type of submarine is primarily designed to destroy enemy merchant ships and other submarines?
Correct Answer: A. SSN
• **SSN** = SSN refers to nuclear-powered general-purpose attack submarines. • **Data/Significance** — Unlike ballistic missile submarines, their primary role is offensive combat and intelligence gathering. • Wrong-option analysis: B SSBN: incorrect type; C Deep Submergence Rescue Vehicle: incorrect type; D Midget Submarine: incorrect type.
The process of a submarine using sound waves to navigate and detect other vessels is called?
Correct Answer: C. Sonar
• **Sonar** = Sonar stands for Sound Navigation and Ranging. • **Data/Significance** — It is essential for underwater communication because radio waves do not travel well through deep water. • Wrong-option analysis: A Radar: related but different; B Lidar: related but different; D Echo-location: incorrect type.
What component is used by a submarine to see objects on the surface while remaining submerged at a shallow depth?
Correct Answer: D. Periscope
• **A** = A periscope uses mirrors or prisms to allow the crew to observe the surface from underwater. • **Data/Significance** — Modern submarines often use optronic masts with high-resolution cameras instead of traditional optical tubes. • Wrong-option analysis: A Stethoscope: related but different; B Microscope: related but different; C Telescope: related but different.
India's Project 75 involves the construction of which class of diesel-electric attack submarines?
Correct Answer: A. Kalvari Class
• **The** = The Kalvari class is based on the French Scorpène-class design. • **Data/Significance** — Six of these submarines were planned to be built at Mazagon Dock Limited in Mumbai. • Wrong-option analysis: B Sindhughosh Class: incorrect type; C Shishumar Class: incorrect type; D Arihant Class: incorrect type.
The deepest point a submarine can safely descend to without the hull collapsing is known as its?
Correct Answer: C. Crush Depth
• **Crush** = Crush depth is the theoretical depth at which water pressure would cause the submarine's hull to fail. • **Data/Significance** — Designers usually set the maximum operating depth well above this limit for safety. • Wrong-option analysis: A Cruising Depth: related but different; B Test Depth: related but different; D Operating Depth: incorrect type.
Which historical vessel is generally accepted as the first military submarine to be used in combat?
Correct Answer: D. The Turtle
• **The** = The Turtle was a hand-powered egg-shaped device used during the American Revolutionary War in 1776. • **Data/Significance** — The Turtle was a hand-powered egg-shaped device used during the American Revolutionary War in 1776. • Wrong-option analysis: A The Nautilus: related but different; B The Holland: related but different; C HMS Dreadnought: related but different.
Which country operated the 'Typhoon' class, recognized as the largest submarines ever built?
Correct Answer: A. Soviet Union/Russia
• **The** = The correct answer is 'Soviet Union/Russia'. • **Data/Significance** — The Typhoon class (Project 941 Akula) was designed to carry ballistic missiles during the Cold War. • Wrong-option analysis: B United States: incorrect type; C United Kingdom: incorrect type; D China: incorrect type.