Space & Defence Technology — MPSC PYQ
Every Space & Defence Technology question MPSC has actually asked in Science & Technology, 2014–2025 — 7 questions, each with the correct answer from the official MPSC key and a full explanation. Newest papers first.
खालीलपैकी कोणत्या निरीक्षणामध्ये विश्व स्थिर नसून ते विस्तारीत आहे याबद्दल पुष्टी मिळते ? Which of the following confirms that the universe is not static but expanding ?
The red shift in the light coming from distant galaxies indicates that galaxies are moving away from us, which confirms that the universe is expanding (Hubble's Law).
खालीलपैकी कोणती पद्धती पृथ्वी आणि ग्रह यांच्यामधील अंतर मोजण्यासाठी वापरतात? Which of the following methods is used for measurement of distance between Earth and planets?
The parallax method is standardly used for measuring large astronomical distances between the Earth and distant planets or stars.
पुढील विधानांचा विचार करा : / Consider the following statements :
(a)दूरसंचार उपग्रहाची गती पृथ्वीच्या गतीशी सापेक्षकपणे शून्य असते. / The speed of telecommunication satellite relative to earth is zero.
(b)म्हणून तो उपग्रह पृथ्वीवरील माणसांस स्थिर आहे असे वाटते. / Hence it appears to be stationary to a person on the earth.
A geostationary telecommunication satellite has an angular speed equal to Earth's rotational speed, so its relative speed with respect to Earth is zero (statement a). Because its relative speed is zero, it appears stationary to an observer on Earth (statement b). Thus, (a) is true and correctly explains (b).
🏛️ The Maharashtra angle
खालीलपैकी काय जिओस्टेशनरी ऑर्बिट (GEO) चे अचूकपणे वर्णन करते ? / Which of the following describes the Geostationary Orbit (GEO) correctly ?
A Geostationary Orbit (GEO) is located at an altitude of approximately 36,000 km above the Earth's equator, and its orbital period matches the Earth's rotational period of 24 hours.
जीसॅट-7 (GSAT-7) हा पहिले नौदल उपयुक्त, उपग्रह केव्हा प्रक्षेपित करण्यात आला ? / GSAT-7, the first Navy user satellite was launched on
GSAT-7, also known as Rukmini, is India's first dedicated military communications satellite for the Indian Navy, launched in August 2013 from Kourou, French Guiana.
खालीलपैकी कोणती जोडी चूक आहे? Which one of the following pairs is not correctly matched?
(a)अग्नि V - आंतरखंडीय पल्ल्याचे क्षेपणास्त्र
(b)त्रिशूल - सुपरसोनिक क्रूझ क्षेपणास्त्र
(c)शौर्य - हायपरसोनिक क्रूझ क्षेपणास्त्र
(d)धनुष - अल्प पल्ल्याचे क्षेपणास्त्र
Trishul is a short-range surface-to-air missile, not a supersonic cruise missile. Therefore, pair (b) is incorrectly matched.
🏛️ The Maharashtra angle
मंगळाकडे (Mars) जाण्यासाठी खालील सहा देशांनी अथवा एजन्सींनी हाती घेतलेल्या मोहिमांना काळ क्रमाने लावा : (a) अमेरिका (b) रशिया (c) चीन (d) जपान (e) युरोपिय स्पेस एजंन्सी (f) भारत Give the correct chronological sequence of the missions undertaken to Mars by the six countries or agencies given below : (a) America (b) Russia (c) China (d) Japan (e) European Space Agency (f) Bharat
(a)अमेरिका / America
(b)रशिया / Russia
(c)चीन / China
(d)जपान / Japan
(e)युरोपिय स्पेस एजंन्सी / European Space Agency
(f)भारत / Bharat
Russia was the first to attempt Mars missions, followed by USA, Japan, ESA, China, and India (Mangalyaan).
🏛️ The Maharashtra angle