RRB JE : Science Quiz | 16th May

Railway Board offers opulent and revered job posts to its aspirants. And it is not every year that we get the notification from Railway offering a good number of vacant seats to the multitude aspirants. Railway JE is a great opportunity for all aspirants with a total of 13,487 vacancies and science is an important subject of the same. Here we are providing the science quiz to help our aspirants ace this subject.

Q1. Bacteria was discovered by –
बैक्टीरिया किसके द्वारा खोजा गया था?
(a) Antonie van Leeuwenhoek / अन्तोनिए वन लेयूवेन्कोएक
(b) Belarus / बेलारूस
(c) Hugo de Vries / ह्यूगो दे वृएस
(d) Robert Brown / रोबर्ट ब्राउन

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Ans. (a)
Sol. Bacteria was discovered by Antonie van Leeuwenhoek.

Q2. Scurvy (bleeding of gums) is caused by deficiency of which vitamin?
स्कर्वी (मसूड़ों का खून) किस विटामिन की कमी के कारण होता है?
(a) Vitamin K /विटामिन K
(b) Vitamin B2 /विटामिन B2
(c) Vitamin C / विटामिन C
(d) Vitamin A /विटामिन A

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Ans. (c)
Sol. Scurvy is caused due to deficiency of Vitamin C.

Q3. Achras sapote is the scientific name of
आच्रस सपोटा किसका वैज्ञानिक नाम है?
(a) Custard Apple/ शरीफा
(b) Gulmohar / गुलमोहर
(c) Tamarind/ इमली
(d) Chiku/चीकू

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Ans.(d)
Sol. Achras sapote is the scientific name of Chiku.

Q4. Prawn belongs to the phylum
झींगा किस फाईलम से संबंधित है?
(a) Arthropoda /आर्थ्रोपोडा
(b) Cnidaria /निडारिया
(c) Echinodermata /एकीनोडरमाटा
(d) Chordata /कोर्डेटा

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Ans.(a)
Sol. Prawn belongs to the phylum Arthropoda.

Q5.Which of the following organisms does not fit into the Cell Theory?
निम्नलिखित में से कौन सा जीव कोशिका सिद्धांत के अंतर्गत नहीं है?
(a) Bacteria/ जीवाणु
(b) Virus/वायरस
(c) Fungi/कवक
(d) Plants/पौधे

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Ans.(b)
Sol. Cell theory is not applicable on Viruses. They are made up of proteins and one of nucleic acids i.e. DNA or RNA. So they lack protoplasm, the essential part of the cell.

Q6. The resources which can be used continuously, year-after are called –
संसाधन जो लगातार उपयोग किए जा सकते हैं, वर्ष-बाद उन्हें क्या कहा जाता है –
(a) Biotic /जैविक
(b) Abiotic /अजैविक
(c) Non-renewable /गैर नवीकरणीय
(d) Renewable /अक्षय

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Ans.(d)
Sol. The resources which can be used continuously, year-after are called Renewable resources.

Q7. A balloon filled with helium rises in air because –
हीलियम से भरा एक गुब्बारा हवा में उड़ता है क्योंकि-
(a) air exerts an upward force on the balloon /हवा गुब्बारे पर ऊपर की तरफ बल डालती है.
(b) the balloon is weightless /गुब्बारा वजन रहित होता है.
(c) helium is less dense than air /हीलियम हवा की तुलना में कम सघन होती है.
(d) helium pushes down on the air below the balloon /हीलियम गुब्बारे के नीचे हवा पर नीचे की ओर दबाव डालती है.

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Ans.(c)
Sol. Air contains 78% of nitrogen which is heavier than helium. Therefore, a balloon filled with helium rises in air because helium is less dense than air.

Q8. German silver, an alloy, does not contain the metal –
जर्मन चांदी, एक मिश्र धातु जिसमें कौन सी धातु शामिल नहीं होती है?
(a) Nickel /निकेल
(b) Zinc /जिंक
(c) Copper /तांबा
(d) Silver /चांदी

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Ans.(d)
Sol. German silver is an alloy of having 60% copper, 20% nickel and 20% zinc. It is also known as Nickel Silver. Nickel silver is named for its silvery appearance, but it contains no silver.

Q9. Which of the following imparts a blue colour to glass?
निम्नलिखित में से क्या कांच को एक नीला रंग प्रदान करता है?
(a) Cobalt Oxide /कोबाल्ट ऑक्साइड
(b) Copper Oxide /कॉपर ऑक्साइड
(c) Iron Oxide /आयरन ऑक्साइड
(d) Nickel Oxide /निकल ऑक्साइड

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Ans.(a)
Sol. The following metals imparts different colour to glasses- Cobalt oxide: deep blue colour; copper oxide: turquoise; chromium: dark green to black; cadmium sulphide: deep yellow etc.

Q10. What is the most commonly used substance is fluorescent tubes?
फ्लोरोसेंट ट्यूब में सामान्य रूप से इस्तेमाल किया जाने वाला पदार्थ क्या है?
(a) Sodium oxide and Argon /सोडियम ऑक्साइड और आर्गन
(b) Sodium vapour and Neon /सोडियम भाप और नियॉन
(c) Mercury vapour and Argon /मरकरी वाष्प और आर्गन
(d) Mercury oxide and Neon /मरकरी ऑक्साइड और नियॉन

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Ans.(c)
Sol. A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapour. It contains Mercury Vapour and Argon.

Q11. Which one of the following instrument is used for locating submerged objects in an ocean?
निम्नलिखित साधन में से कौन सा एक महासागर में डुबी हुई वस्तुओं का पता लगाने के लिए उपयोग किया जाता है?
(a) Audiometer/श्रवण-शक्तिमापी
(b) Galvanometer/गैल्वेनोमीटर
(c) Sextant/सेक्सटैन्ट
(d) SONAR/सोनार

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Ans.(d)
Sol. SONAR [Sound Navigation and Ranging is used for locating submerged objects in an ocean.

Q12. Which of the following is not a vector quantity?
इनमें से कौन सा एक वेक्टर क्वांटिटी नहीं है?
(a) Displacement/विस्थापन
(b) Velocity/वेग
(c) Force/बल
(d) Volume/आयतन

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Ans.(d)
Sol. A vector quantity is a quantity that is fully described by both magnitude and direction. On the other hand, a scalar quantity is a quantity that is fully described by its magnitude. Thus displacement, velocity and force are the example of vector quantity while volume is a scalar quantity.

Q13. Who gave the theory of gravity?
गुरुत्वाकर्षण का सिद्धांत किसने दिया?
(a) Charles Newton/चार्ल्स न्यूटन
(b) Charles Babbage/चार्ल्स बैबेज
(c) Isaac Newton/आइजैक न्यूटन
(d) John Adams/जॉन एडम्स

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Ans.(c)
Sol. In 1687, Isaac Newton published his Law of Gravitation in “Mathematical Principles of Natural Philosophy”. He gave the Theory of Gravity.

Q14. GPS stands for which one of the following?
GPS का पूर्ण रूप क्या है?
(a) Greenwich Polar Satellite
(b) Global Police Surveillance
(c) Global Positioning System
(d) General Pacific Survey

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Ans.(c)
Sol. GPS means Global Positioning System, is a space-based navigation system. It was developed by the U.S. Department of defence.

Q15. Einstein was honoured with Nobel Prize for:
आइंस्टीन को ______ के लिए नोबेल पुरस्कार से सम्मानित किया गया.
(a) Photoelectric Effect/प्रकाश विद्युत प्रभाव
(b) Theory of Specific Heat/विशिष्ट गर्मी का सिद्धांत
(c) Special Theory of Relativity/सापेक्षता के विशेष सिद्धांत
(d) Bose-Einstein Statistics/बोस-आइंस्टीन सांख्यिकी

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Ans.(a)
Sol. The Noble Prize in Physics in 1921 was awarded to Albert Einstein for his services to Theoretical Physics and especially for his discovery of the “Law of the Photoelectric Effect”.

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