Submarines — Set 4
Technology · पनडुब्बियां · Questions 31–40 of 40
What is the name of the second nuclear-powered ballistic missile submarine of India, commissioned in 2024?
Correct Answer: B. INS Arighat
• **INS** = INS Arighat is the second ship of the Arihant class and features significant technological upgrades over its predecessor. • **Data/Significance** — It was built at the Ship Building Centre in Visakhapatnam. • Wrong-option analysis: A INS Arihant: related but different; C INS Aridhaman: incorrect type; D INS Akula: incorrect type.
The speed of a submarine is usually measured in which unit?
Correct Answer: B. Knots
• **The** = The correct answer is 'Knots'. • **Data/Significance** — One knot is approximately 1.85 kilometers per hour.. • Wrong-option analysis: A Kilometers per hour: related but different; C Miles per hour: incorrect type; D Mach: incorrect type.
Which German submarine type was famous for its 'Wolfpack' tactics during World War II?
Correct Answer: B. U-boat
• **U-boat** = U-boat is the anglicized version of the German word 'Unterseeboot'. • **Data/Significance** — These submarines were used to disrupt Allied supply lines by attacking in coordinated groups called wolfpacks. • Wrong-option analysis: A Destroyer: related but different; C Frigate: incorrect type; D Cutter: incorrect type.
Which Indian submarine became the first to be gifted to a foreign country (Myanmar) in 2020?
Correct Answer: A. INS Sindhuvir
• **INS** = INS Sindhuvir was a Kilo-class submarine that was refurbished before being handed over to the Myanmar Navy. • **Data/Significance** — It was renamed UMS Minye Kyaw Htin by Myanmar. • Wrong-option analysis: B INS Kalvari: incorrect type; C INS Sindhuraj: incorrect type; D INS Shalki: incorrect type.
Which of the following is used to maintain a constant depth in a submarine without using the engine?
Correct Answer: B. Hydroplanes (Diving Planes)
• **Hydroplanes** = Hydroplanes are wing-like structures that can be tilted to create upward or downward force as the submarine moves. • **Data/Significance** — They act like the elevators on an airplane's tail to control the pitch and depth. • Wrong-option analysis: A Rudders: related but different; C Propellers: incorrect type; D Anchors: incorrect type.
What is the name of the Indian Navy's museum in Visakhapatnam that is housed inside a real submarine?
Correct Answer: B. Kursura Submarine Museum
• **The** = The INS Kursura (S20) was a Soviet-built Foxtrot-class submarine that served for 31 years. • **Data/Significance** — The INS Kursura (S20) was a Soviet-built Foxtrot-class submarine that served for 31 years. • Wrong-option analysis: A Sea Hawk Museum: related but different; C Victory Museum: incorrect type; D Maritime Heritage Centre: incorrect type.
Which country currently holds the record for the most active submarines in its naval fleet?
Correct Answer: B. China
• **While** = While the USA has a more technologically advanced and all-nuclear fleet, China (PLAN) has the largest number of total submarine units. • **Data/Significance** — This includes a mix of diesel-electric and nuclear-powered vessels. • Wrong-option analysis: A USA: related but different; C Russia: incorrect type; D North Korea: incorrect type.
The primary weapon used by submarines to attack surface ships or other submarines is the?
Correct Answer: A. Torpedo
• **A** = A torpedo is a self-propelled underwater projectile with an explosive warhead. • **Data/Significance** — Modern torpedoes can be guided by wire or use their own sonar to find targets. • Wrong-option analysis: B Grenade: incorrect type; C Bayonet: incorrect type; D Howitzer: incorrect type.
Which gas, if leaked from the batteries of a conventional submarine, can be extremely dangerous for the crew?
Correct Answer: B. Hydrogen
• **Charging** = Charging lead-acid batteries produces hydrogen gas, which is highly flammable and explosive in enclosed spaces. • **Data/Significance** — Submarines have specialized sensors and ventilation systems to monitor and remove hydrogen safely. • Wrong-option analysis: A Oxygen: related but different; C Nitrogen: incorrect type; D Carbon Dioxide: incorrect type.
In submarine operations, what is the meaning of the command 'Dive, Dive!'?
Correct Answer: B. Flood ballast tanks and submerge
• **This** = This command initiates the process of moving from the surface to an underwater position. • **Data/Significance** — It involves opening vents to allow water into the ballast tanks and adjusting the hydroplanes. • Wrong-option analysis: A Abandon ship: related but different; C Increase speed: incorrect type; D Surface immediately: incorrect type.