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Q1: Which component allows a submarine to control its depth by taking in or expelling water?
A1: Ballast tanks
Q2: What was the first submarine to complete a successful military attack in history?
A2: H. L. Hunley
Q3: Select all of the following that are main types of submarine propulsion systems:
A3: Nuclear power, Diesel-electric, Air-independent propulsion
Q4: What is the maximum operating depth of most modern military submarines?
A4: 200-400 metres
Q5: Match each submarine component to its primary function:
A5: Periscope - Surface observation, Hydrophones - Underwater sound detection, Snorkel - Air supply when submerged
Q6: Which country currently operates the largest submarine fleet in the world?
A6: China
Q7: Arrange these submarine developments in chronological order, from earliest to latest:
A7: First hand-cranked submarine, First diesel-electric submarine, First nuclear-powered submarine
Q8: What is the main advantage of a nuclear submarine over a diesel-electric submarine?
A8: Can remain submerged for months
Q9: What device do submarines use to determine the direction of underwater sounds?
A9: Hydrophone array
Q10: What is the term for a submarine's maximum safe operating depth?
A10: Test depth
Q11: Which submarine pioneered the use of nuclear propulsion in 1954?
A11: USS Nautilus
Q12: What is the primary function of a submarine's trim tanks?
A12: Maintain horizontal balance
Q13: Which part of a submarine is designed to withstand extreme pressure at depth?
A13: Pressure hull
Q14: What is the term for the vertical fin on top of a submarine?
A14: Sail
Q15: What emergency system allows submariners to escape a disabled submarine?
A15: Escape trunk
Q16: What is the name for the rotating platform that launches torpedoes from a submarine?
A16: Torpedo ring
Q17: Which gas builds up inside submarines and must be carefully monitored?
A17: Carbon dioxide
Q18: What is the term for a submarine's ability to maintain a constant depth?
A18: Neutral buoyancy
Q19: What navigational system do modern submarines use while submerged?
A19: Inertial navigation
Q20: What is the primary purpose of a submarine's anechoic tiles?
A20: Reduce sonar detection