Question 1

What is the primary physical principle that allows a submarine to control its buoyancy and submerge in water?

Accepted Answer

Archimedes' Principle. Archimedes' Principle states that the upward buoyant force is equal to the weight of the fluid displaced. Submarines use ballast tanks to change their density and weight to submerge or float. This fundamental law governs the stability of all marine vessels.

Question 2

The first indigenous nuclear-powered ballistic missile submarine of India is named?

Accepted Answer

INS Arihant. INS Arihant was commissioned into the Indian Navy in 2016. It makes India one of the few countries to possess a nuclear triad capability. The name 'Arihant' translates to 'Slayer of Enemies' in Sanskrit.

Question 3

In submarine terminology, what does the acronym 'AIP' stand for?

Accepted Answer

Air-Independent Propulsion. Air-Independent Propulsion allows non-nuclear submarines to operate without access to atmospheric oxygen. This technology significantly increases the underwater endurance of conventional diesel-electric submarines. It enhances stealth by reducing the need to surface frequently to recharge batteries.

Question 4

Which type of submarine is primarily designed to destroy enemy merchant ships and other submarines?

Accepted Answer

SSN. SSN refers to nuclear-powered general-purpose attack submarines. Unlike ballistic missile submarines, their primary role is offensive combat and intelligence gathering. Their nuclear reactors allow for high speed and unlimited range.

Question 5

The process of a submarine using sound waves to navigate and detect other vessels is called?

Accepted Answer

Sonar. Sonar stands for Sound Navigation and Ranging. It is essential for underwater communication because radio waves do not travel well through deep water. There are two types: active sonar, which emits pulses, and passive sonar, which only listens.

Submarines — Set 1