Tag: science & technology

Questions Related to science & technology

Multiple choice general knowledge science & technology
  1. boeing x-47

  2. concorde sst

  3. f-22 raptor

  4. airbus A-330

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Concorde SST was a supersonic transport aircraft that cruised at Mach 2.04 (around 2,180 km/h or 1,354 mph). The F-22 Raptor is a fighter jet, not transport. Boeing X-47 is an unmanned combat aerial vehicle, not transport. Airbus A-330 is a conventional subsonic airliner. Concorde was the fastest commercial transport aircraft in service until its retirement in 2003.

Multiple choice general knowledge science & technology
  1. newton's 3rd law

  2. D'alembert's paradox

  3. bernoulli's principle

  4. boyle's law

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bernoulli's principle explains wing lift: the airfoil shape creates faster airflow over the curved upper surface, reducing pressure there relative to the higher pressure below, generating lift. While Newton's 3rd law also applies (action-reaction with downwash), Bernoulli's principle is the standard answer for the primary lift mechanism. D'Alembert's paradox relates to fluid dynamics drag, and Boyle's law concerns gas pressure-volume relationships.

Multiple choice general knowledge science & technology
  1. True

  2. False

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Airbus A380 is indeed the largest commercial airliner ever built in terms of passenger capacity (typically 525-553 passengers in three-class configuration, up to 853 in single-class) and physical size. It entered service in 2007 and holds this record to date. While some military aircraft are larger, no commercial passenger aircraft exceeds the A380's size.

Multiple choice general knowledge science & technology
  1. True

  2. False

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The atomic bombs dropped on Japan in 1945 were delivered by B-29 Superfortress bombers, specifically the Enola Gay (Hiroshima) and Bockscar (Nagasaki). The B-52 Stratofortress was not developed until the 1950s and entered service in the 1950s, making it impossible for it to have been used in WWII.

Multiple choice general knowledge science & technology
  1. True

  2. False

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Botanically, almonds are not nuts - they are seeds (specifically, drupes). The almond fruit is a drupe with a fleshy exterior and a hard shell containing the seed (what we commonly call an almond). True nuts include acorns, chestnuts, and hazelnuts, which have a different botanical structure.

Multiple choice general knowledge science & technology
  1. USA

  2. France

  3. China

  4. Russia

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mikoyan-Gurevich (MiG) was a Soviet/Russian aerospace design bureau founded in 1939. It produced numerous famous fighter aircraft including the MiG-15, MiG-21, MiG-25, and MiG-29. The company is headquartered in Moscow, Russia, and has been a major aircraft manufacturer throughout Soviet and Russian history.