ISRO's SpaDeX

Here are 11 multiple-choice questions (MCQs) on ISRO's Space Docking Experiment (SpaDeX) with detailed explanations:

1. What does SpaDeX stand for in ISRO's mission context?

A) Space Power and Energy Experiment  

B) Space Propulsion and Exploration  

C) Space Docking Experiment  

D) Space Dynamics and Extension

   Answer: C) Space Docking Experiment Explanation: SpaDeX is an acronym for Space Docking Experiment, aimed at demonstrating the technology for rendezvous, docking, and undocking of two spacecraft in orbit.

2. How many satellites are involved in the SpaDeX mission?

A) One  

B) Two  

C) Three  

D) Four

   Answer: B) Two Explanation: The SpaDeX mission involves two satellites - SDX01, the 'Chaser,' and SDX02, the 'Target,' to perform the docking experiment.

3. Which launch vehicle was used to deploy the SpaDeX satellites?

A) GSLV Mk III  

B) PSLV-C60  

C) SSLV  

D) LVM3

   Answer: B) PSLV-C60 Explanation: The Polar Satellite Launch Vehicle (PSLV) C60 was utilized by ISRO to launch the SpaDeX satellites into their designated orbit.

4. What was the primary objective of the SpaDeX mission?

A) To test new propulsion systems  

B) To demonstrate in-space docking  

C) To study atmospheric conditions  

D) To observe distant celestial bodies

   Answer: B) To demonstrate in-space docking Explanation: The primary goal of SpaDeX was to showcase India's capability in executing autonomous spacecraft docking, a critical technology for future space missions.

5. What altitude were the SpaDeX satellites placed at?

A) 200 km  

B) 470 km  

C) 700 km  

D) 1000 km

   Answer: B) 470 km Explanation: Both satellites were launched into a circular orbit at approximately 470 km altitude to carry out the docking experiment.

6. Which of the following is NOT a payload carried by the SpaDeX satellites?

A) High-Resolution Camera (HRC)  

B) Miniature Multi-Spectral Payload (MMX)  

C) Radiation Monitor (RadMon)  

D) Gravitational Wave Detector

   Answer: D) Gravitational Wave Detector Explanation: The SpaDeX satellites carry HRC, MMX, and RadMon, but not a Gravitational Wave Detector, which is not relevant to the mission objectives.

7. What was one of the significant achievements of the SpaDeX mission?

A) First Indian satellite to orbit Mars  

B) Successful demonstration of docking  

C) Longest duration satellite in space  

D) First interplanetary communication

   Answer: B) Successful demonstration of docking Explanation: One of the key achievements was the successful demonstration of in-space docking, making India the fourth country to master this technology.

8. Which country did not have space docking technology before SpaDeX?

A) USA  

B) Russia  

C) China  

D) Japan

   Answer: D) Japan Explanation: Before SpaDeX, only the USA, Russia, and China had demonstrated space docking capabilities. Japan had not shown this capability at that point.

9. What was the initial planned docking distance for SpaDeX?

A) 100 meters  

B) 50 meters  

C) 3 meters  

D) 1 meter

   Answer: C) 3 meters Explanation: The initial plan was to bring the satellites to within 3 meters of each other before attempting docking, showcasing precision in space operations.

10. What is the expected operational life of the SpaDeX satellites after their mission?

A) 3 months  

B) 6 months  

C) 1 year  

D) Up to 2 years

   Answer: D) Up to 2 years Explanation: After the docking experiments, both satellites are expected to continue their operations for scientific observations for up to two years.

11. What was the outcome of the third attempt at docking in SpaDeX?

A) Successful docking  

B) Delayed due to weather  

C) Cancelled due to sensor delay  

D) Rescheduled for next month

   Answer: C) Cancelled due to sensor delay Explanation: The third docking attempt was cancelled because of delays in receiving signals from the proximity and docking sensors, leading to a decision to postpone further attempts.

These questions explore various dimensions of ISRO's SpaDeX mission, from its technical aspects to its outcomes and significance in the context of space technology development.