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. But the current year 2018 brought a pleasant surprise with almost 90,000 seats to be filled by the valid candidates. Opportunity is here but you have to welcome it with a provident strategy.
रेलवे बोर्ड अपने उम्मीदवारों के लिए भव्य और प्रतिष्ठित कार्य पदों की पेशकश करता है. और हर साल ऐसा नहीं होता है कि हमें रेलवे की ओर से अधिसूचना मिलती है. लेकिन वर्तमान वर्ष 2018 आपके लिए बहुत सुखद वर्ष है क्योंकि इसमें लगभग 90,000 सीटों को वैध उम्मीदवारों द्वारा भरा जाएगा. आपके पास बहुत अच्छा अवसर है और आपको इसे एक बेहतर रणनीति से प्राप्त करना होगा.
Q1. In atom, neutron was discovered by:
परमाणु में, न्यूट्रॉन की खोज किसके द्वारा की गई थी?
(a) J.J. Thomson / जे.जे. थॉमसन
(b) Chadwick / चाडविक
(c) Rutherford / रदरफोर्ड
(d) Newton / न्यूटन
Ans. (b)
Sol.Neutron is a neutral particle which has no electrical charge. It was discovered by Chadwick in 1932.
Sol.Neutron is a neutral particle which has no electrical charge. It was discovered by Chadwick in 1932.
Q2. Change of water into the vapour is called-
पानी के वाष्प में परिवर्तन को कहा जाता है-
(a) Natural change/ प्रकृतिक परिवर्तन
(b) Physical change/ शारीरिक परिवर्तन
(c) Chemical change/ केमिकल परिवर्तन
(d) Biological change/ जैविक परिवर्तन
Show Answer
Ans. (b)
Sol.Change of water into the vapour is called a physical change.
Sol.Change of water into the vapour is called a physical change.
Q3. Which one of the following is the hardest metal?
निम्न में से कौन सी सबसे कठोर धातु है?
(a) Gold/सोना
(b) Iron/आयरन
(c) Tungsten /टंगस्टन
(d) Silver/ चांदी
Show Answer
Ans. (c)
Sol. The strongest natural metal is tungsten, commonly used by electrical companies and the military, while steel is the strongest alloy.
Sol. The strongest natural metal is tungsten, commonly used by electrical companies and the military, while steel is the strongest alloy.
Q4. These days yellow lamps are frequently used as street light. Which one of the following us used in these lamps:
इन दिनों पीले लैंप अक्सर सड़क के प्रकाश के रूप में उपयोग किया जाता है इनमें से कौन सा इन दीपक में इस्तेमाल किया जाता है?
(a) Sodium / सोडियम
(b) Neon / नियॉन
(c) Hydrogen / हाइड्रोजन
(d) Nitrogen /नाइट्रोजन
Show Answer
Ans. (a)
There are 2 types of street light bulbs are used by municipalities. They are sodium vapor and mercury vapor bulbs. The mercury vapor bulbs are usually a white ambient light and sodium on orange/yellow light.
There are 2 types of street light bulbs are used by municipalities. They are sodium vapor and mercury vapor bulbs. The mercury vapor bulbs are usually a white ambient light and sodium on orange/yellow light.
Q5. In which of the following industries is mica used as a raw material-
निम्नलिखित उद्योगों में से किसमें एक अभ्रक एक कच्चा माल के रूप में प्रयोग किया जाता है-
(a) Iron and steel / आयरन और स्टील
(b) Toys / खिलौने
(c) Glass and pottery /कांच और बर्तनों
(d) Electrical / विद्युत
Show Answer
Ans. (d)
Sol.Mica is good conductor of heat and bad conductor of electricity so mica use in electrical industry.
Sol.Mica is good conductor of heat and bad conductor of electricity so mica use in electrical industry.
Q6. Which of the following is mainly used for the production of Aluminum?
निम्नलिखित में से कौन सा एल्यूमिनियम के उत्पादन के लिए मुख्य रूप से प्रयोग किया जाता है?
(a) Hematite / हेमटाइट
(b) Lignite/लिग्नाइट
(c) Bauxite/ बॉक्साइट
(d) Magnetite / मैग्नेटाइट
Show Answer
Ans. (c)
Sol.Bauxite is an ore of Aluminum, which is found in the form of Hydrated Aluminium Oxides.
Sol.Bauxite is an ore of Aluminum, which is found in the form of Hydrated Aluminium Oxides.
सोल्डर करने वाली धांतु में सोल्डर धांतु किस मिश्रित धांतु कि होती है?
(a) Tin and Zinc / टिन और जिंक
(b) Tin and Lead /टिन और लेड
(c) Tin, Zinc and Copper / टिन, जिंक और कॉपर
(d) Tin, Lead and Zinc / टिन, लेड और जिंक
Show Answer
Ans. (b)
Sol.The common composition of solder is 32% Tin, 68% Lead. This combination has a low melting point and is useful for soldering components that are sensitive to heat.
Sol.The common composition of solder is 32% Tin, 68% Lead. This combination has a low melting point and is useful for soldering components that are sensitive to heat.
Q8. Which of the following do not consist carbon?
इनमें से किसमें कार्बन नहीं होता है?
(a) Diamond /हीरा
(b) Graphite /ग्रेफाइट
(c) coal / कोयला
(d) None of these /इनमें से कोई नहीं
Show Answer
Ans. (d)
Sol.Diamond is an additional form of Carbon. Its relative density is 3.5 Graphite is a slaty-black coloured smooth and brightly organic matter of relative density 2.25, while coal is a solid organic matter used as fuel. All the three are consist of carbon.
Sol.Diamond is an additional form of Carbon. Its relative density is 3.5 Graphite is a slaty-black coloured smooth and brightly organic matter of relative density 2.25, while coal is a solid organic matter used as fuel. All the three are consist of carbon.
Q9. Which one of the following fuels causes minimum air pollution?
निम्न में से कौन सा ईंधन न्यूनतम वायु प्रदूषण फैलता है?
(a) Kerosene oil / मिट्टी का तेल
(b) Hydrogen / हाइड्रोजन
(c) Coal /कोयला
(d) Diesel / डीजल
Show Answer
Ans. (b)
Sol.Hydrogen is the purest combustion fuel. Water is generated from burning of Hydrogen. While coal, kerosene oil and diesel are known as fossil fuel which generates, Carbon dioxide and many other harmful gases when it burns.
Sol.Hydrogen is the purest combustion fuel. Water is generated from burning of Hydrogen. While coal, kerosene oil and diesel are known as fossil fuel which generates, Carbon dioxide and many other harmful gases when it burns.
Q10. Which gas is used in the purification of drinking water?
पीने के पानी के शुद्धिकरण में किस गैस का उपयोग किया जाता है?
(a) Helium / हीलियम
(b) Chlorine / क्लोरीन
(c) Fluorine / फ्लोरिन
(d) Carbon Dioxide / कार्बन डाइऑक्साइड
Show Answer
Ans. (b)
Sol.Chlorine is presently an important chemical for water purification (such as in water treatment plants), disinfectants and in bleach.
Sol.Chlorine is presently an important chemical for water purification (such as in water treatment plants), disinfectants and in bleach.
Q11. Which is used as laughing gas is-
जो हंसने वाले गैस के रूप में प्रयोग किया जाता है-
(a) Nitrous Oxide /नाइट्रस ऑक्साइड
(b) Nitrogen dioxide /नाइट्रोजन डाइऑक्साइड
(c) Nitrogen Trioxide / नाइट्रोजन ट्रायऑक्साइड
(d) Nitrogen Tetra Oxide / नाइट्रोजन टेट्रा ऑक्साइड
Show Answer
Ans. (a)
Sol.Nitrous Oxide (N2O) is also known as laughing gas. It is a colourless gas with a sweet odour and taste. It is also used as the anesthetic gas.
Sol.Nitrous Oxide (N2O) is also known as laughing gas. It is a colourless gas with a sweet odour and taste. It is also used as the anesthetic gas.
Q12. What is Nila thotha?
नीला थोथा क्या है?
(a) Copper Sulphate / कॉपर सल्फेट
(b) Calcium Sulphate / कैल्शियम सल्फेट
(c) Iron Sulphate /आयरन सल्फेट
(d) Sodium Sulphate /सोडियम सल्फेट
Show Answer
Ans. (a)
Sol.Nila thotha is a compound of Copper and sulphate. Its chemical formula is CuSO4.5H2O.
Sol.Nila thotha is a compound of Copper and sulphate. Its chemical formula is CuSO4.5H2O.
Q13.Which is the fundamental element of all organic compounds?
सभी कार्बनिक यौगिकों का मूल तत्व क्या है?
(a) Nitrogen /नाइट्रोजन
(b) Oxygen /ऑक्सीजन
(c) Carbon / कार्बन
(d) Brimstone / ब्रमस्टोन
सभी कार्बनिक यौगिकों का मूल तत्व क्या है?
(a) Nitrogen /नाइट्रोजन
(b) Oxygen /ऑक्सीजन
(c) Carbon / कार्बन
(d) Brimstone / ब्रमस्टोन
Show Answer
Ans. (c)
Sol.The organic compounds are a large class of chemical compounds in which one or more atoms of carbon are covalently linked atoms of other elements, most commonly Hydrogen, Oxygen or Nitrogen.
Sol.The organic compounds are a large class of chemical compounds in which one or more atoms of carbon are covalently linked atoms of other elements, most commonly Hydrogen, Oxygen or Nitrogen.
Q14. Which acid is found in Vinegar?
सिरके में कौन सा एसिड पाया जाता है?
(a) Lactic Acid /लैक्टिक एसिड
(b) Citric Acid / साइट्रिक एसिड
(c) Malic Acid /मलिक एसिड
(d) Acetic Acid / एसिटिक एसिड
Show Answer
Ans. (d)
Sol. Acetic acid is the chief component of vinegar. Vinegar is liquid consisting mainly of acetic acid (CH3COOH) and water.
Sol. Acetic acid is the chief component of vinegar. Vinegar is liquid consisting mainly of acetic acid (CH3COOH) and water.
Q15. To avoid ‘knocking’ of the engine of a car, which one of the following is used as an anti-knocking agent?
एक कार के इंजन की क्नोकिंग' से बचने के लिए, निम्न में से कौन-से एक एंटी-क्नोकिंग एजेंट के रूप में उपयोग किया जाता है?
(a) Ethyl alcohol / एथिल अल्कोहल
(b) Butane / ब्यूटेन
(c) Lead Tetra Ethyl / लीड टेट्रा इथाइल
(d) White Petrol / व्हाइट पेट्रोल
Show Answer
Ans. (c)
Sol. Tetraethyl Lead (CH3CH2)4Pb is the chief antiknock agent for automotive gasoline or petrol.
Sol. Tetraethyl Lead (CH3CH2)4Pb is the chief antiknock agent for automotive gasoline or petrol.
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