8. Why do rockets have a \"Diverging Nozzle\" at the exit? Question 8 options: a

Question

8. Why do rockets have a "Diverging Nozzle" at the exit?

Question 8 options:

a. To increase the exhaust velocity

b. To decrease the noise

c. To reduce the fuel consumption

d. To improve combustion

9. What does the term “principal” in Economics mean?

Question 9 options:

a. The amount of money borrowed or lent

b. The amount of money due/earned at the end of a period

c. The ratio between the interest payable/receivable at the end of a period to the money borrowed/lent

d. None of the above

14. What is the name of the first component of the International Space Station put into orbit?

Question 14 options:

a. Node 1

b. Functional Cargo Block

c. Space Shuttle

d. None of the above

19. What is the name of the probe that was released in the atmosphere of the moon Titan?

Question 19 options:

a. Huygens

b. Cassini

c. Galileo

d. Newton

20. Out-gassing refers to:

Question 20 options:

a. Atomic oxygen corroding the surface of the spacecraft

b. Gas particles forming a coat over delicate sensors

c. High speed particles hitting the spacecraft causing damages

d. None of the above

22. What is approximately the velocity of a satellite in circular LEO orbit around the earth?

Question 22 options:

a. 8 meter per second

b. 8 kilometers per second

c. 8 miles per second

d. 8 miles per hour

23. Who is Wernher Von Braun?

Question 23 options:

a. One of the men responsible for the design of the German V-2 rocket

b. The chief architect of the Saturn V launch vehicle that sent the Apollo spacecraft to the Moon.

c. Both 1 and 2

d. None of the above

a. To increase the exhaust velocity

b. To decrease the noise

c. To reduce the fuel consumption

d. To improve combustion

9. What does the term “principal” in Economics mean?

Question 9 options:

a. The amount of money borrowed or lent

b. The amount of money due/earned at the end of a period

c. The ratio between the interest payable/receivable at the end of a period to the money borrowed/lent

d. None of the above

14. What is the name of the first component of the International Space Station put into orbit?

Question 14 options:

a. Node 1

b. Functional Cargo Block

c. Space Shuttle

d. None of the above

19. What is the name of the probe that was released in the atmosphere of the moon Titan?

Question 19 options:

a. Huygens

b. Cassini

c. Galileo

d. Newton

20. Out-gassing refers to:

Question 20 options:

a. Atomic oxygen corroding the surface of the spacecraft

b. Gas particles forming a coat over delicate sensors

c. High speed particles hitting the spacecraft causing damages

d. None of the above

22. What is approximately the velocity of a satellite in circular LEO orbit around the earth?

Question 22 options:

a. 8 meter per second

b. 8 kilometers per second

c. 8 miles per second

d. 8 miles per hour

23. Who is Wernher Von Braun?

Question 23 options:

a. One of the men responsible for the design of the German V-2 rocket

b. The chief architect of the Saturn V launch vehicle that sent the Apollo spacecraft to the Moon.

c. Both 1 and 2

d. None of the above

Explanation / Answer

8. Ans.- (a.) To increase the exhaust velocity

For compressible flow, the diverging section would increase the velocity of flow.

9. Ans. - (a.) The amount of money borrowed or lent.

Principal refers to the original sum of money borrowed in a loan, or put into an investment.

14. Ans.- (b.) Functional Cargo Block

The Zarya Module, also known by the technical term Functional Cargo Block and the Russian acronym FGB, was the first component launched for the International Space Station. This module was designed to provide the station's initial propulsion and power.

19. Ans. - (b.) Cassini   

NASA's Cassini spacecraft snapped the image on Sept. 11, 2011 and it was released on Dec. 22. Titan is Saturn's largest moon and the second largest in the solar system (after Ganymede of Jupiter). It is the only moon in the solar system with clouds and a dense, planet-like atmosphere.

22. Ans. -(b) 8 km/sec

The mean orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s, but reduces with increased orbital altitude.

23. Ans. (c.) Both 1 & 2

Wernher Von Braun - He helped design and develop the V-2 rocket at Peenemünde during World War II. And he was the chief architect of the Saturn V.

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