Supersonic: Quiz

Question 1: Speeds greater than 5 times the speed of sound are often referred to as ________.

Question 2: Some large bombers, such as the Tupolev Tu-160 and Rockwell/Boeing ________ are also supersonic-capable.
KC-135 StratotankerC-17 Globemaster IIIB-52 StratofortressB-1 Lancer

Question 3: Refer to the speed of sound for the science behind the velocity referred to as the sound barrier, and to ________ for information on the sound associated with supersonic flight.
LightningQuiet SpikeSupersonic transportSonic boom

Question 4: In gases sound travels longitudinally at different speeds, mostly depending on the ________ and temperature of the gas; (pressure has little effect).
DeuteriumHydrogenAtomic massMolecular mass

Question 5: Note that the ________ decreases somewhat with altitude, due to lower temperatures found there (typically up to 25 km).
HeliumAcoustic impedanceSpecific heat capacitySpeed of sound

Question 6: The term came into use during ________ when a number of aircraft started to encounter the effects of compressibility, a grab-bag of unrelated aerodynamic effects.
Soviet occupationsWorld War IISecond Sino-Japanese WarCollaboration with the Axis Powers during World War II

Question 7: Designers use the ________ and the Whitcomb area rule to minimize sudden changes in size.
AerodynamicsSound barrierArea ruleSwept wing

Question 8: Ramps or cones in the intake are used to create ________ that slows the airflow before it reaches the engine.
Shock waveSunMoving shockExplosive material

Question 9: Most modern fighter aircraft are supersonic, but ________ and the Tupolev Tu-144 were the only supersonic passenger aircraft.
Boeing 747BAC TSR-2AirbusConcorde

Question 10: An aircraft that can still sustain supersonic flight without using an ________ is called a supercruise aircraft.

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