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 1,20,000 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 1,20,000 सीटों को वैध उम्मीदवारों द्वारा भरा जाएगा. आपके पास बहुत अच्छा अवसर है और आपको इसे एक बेहतर रणनीति से प्राप्त करना होगा.
Q1. The softest mineral, Talc (Soapstone) is mainly: .
नरम खनिज, टॉल्क (सोपस्टोन) मुख्य रूप से क्या है:
(a) Manganese Silicate/मैंगनीज सिलिकेट
(b) Sodium Silicate/सोडियम सिलिकेट
(c) Sodium Phosphate/सोडियम फॉस्फेट
(d) Magnesium Silicate/मैग्नीशियम सिलिकेट
Ans.(d)
Sol.Talc is a mineral which is composed of hydrated Magnesium silicate formula Mg_3 Si_4 O_10 (OH)_2.
Sol.Talc is a mineral which is composed of hydrated Magnesium silicate formula Mg_3 Si_4 O_10 (OH)_2.
Q2. To make the steel hard requires increase in-
स्टील को कठोर बनाने के लिए निम्नलिखित में से किसकी वृद्धि की आवश्यकता होती है?
(a) The quantity of Carbon / कार्बन की मात्रा
(b) The quantity of Manganese / मैंगनीज की मात्रा
(c) The quantity of Silicon / सिलिकॉन की मात्रा
(d) The quantity of Chromium / क्रोमियम की मात्रा
Show Answer
Ans.(a)
Sol. Steels are alloys of Iron and other elements primarily Carbon and are widely used in construction and other area. Carbon inclusion in Iron as a hardening agent which strengthens Iron by distorting its crystal lattice. This distortion result in hardening.
Sol. Steels are alloys of Iron and other elements primarily Carbon and are widely used in construction and other area. Carbon inclusion in Iron as a hardening agent which strengthens Iron by distorting its crystal lattice. This distortion result in hardening.
Q3. The highest amount of carbon is in-
कार्बन की सबसे अधिक मात्रा किसमें है –
(a) Pig Iron/पिग आयरन
(b) Wrought Iron /रोघ्ट आयरन
(c) Steel/स्टील
(d) Alloy Steel/मिश्र इस्पात
Show Answer
Ans.(a)
Sol. Pig Iron has a very high Carbon content, typically 3.5–4.5%. Wrought Iron is an Iron alloy with a very low Carbon (less than 0.08%) content. Steels containing 0.2% to 1.5% Carbon are known as Carbon steel. The amount of Carbon in alloy steel ranges from 0.1% to 1%.
Sol. Pig Iron has a very high Carbon content, typically 3.5–4.5%. Wrought Iron is an Iron alloy with a very low Carbon (less than 0.08%) content. Steels containing 0.2% to 1.5% Carbon are known as Carbon steel. The amount of Carbon in alloy steel ranges from 0.1% to 1%.
Q4. Which of the following is not in the form of crystal?
निम्नलिखित में से क्या क्रिस्टल के रूप में नहीं होता है?
(a) Diamond/हीरा
(b) Sugar/ चीनी
(c) Salt / नमक
(d) None of these/ इनमें से कोई नहीं
Show Answer
Ans.(d)
Sol. Salt, Sugar, Diamond, Quartz. Ice, Graphite etc. All are in the formed crystal.
Sol. Salt, Sugar, Diamond, Quartz. Ice, Graphite etc. All are in the formed crystal.
Q5. Burning of Hydrogen produces-
हाइड्रोजन के जलने से क्या उत्पन्न होता है –
(a) Oxygen / ऑक्सीजन
(b) Ash / राख
(c) Soil / मिटटी
(d) Water / पानी
Show Answer
Ans.(d)
Sol. Hydrogen gas is highly flammable and burns in air at a very wide range of concentrations between 4% to 75% by volume. Hydrogen gas cannot burn in absence of air. But by burning with Oxygen it produces water.
Sol. Hydrogen gas is highly flammable and burns in air at a very wide range of concentrations between 4% to 75% by volume. Hydrogen gas cannot burn in absence of air. But by burning with Oxygen it produces water.
Q6. Which of the following materials has the highest electrical conductivity?
निम्नलिखित सामग्रियों में से सबसे अधिक विद्युत चालकता किसमें है?
(a) Diamond / हीरा
(b) Silver / सिल्वर
(c) Graphite / ग्रेफाइट
(d) Wood / लकड़ी
Show Answer
Ans.(b)
Sol. Silver has the highest electrical conductivity.
Sol. Silver has the highest electrical conductivity.
Q7. Which of the following is mainly used for the production of Aluminium?
निम्नलिखित में से कौन सा मुख्य रूप से एल्यूमिनियम के उत्पादन के लिए उपयोग किया जाता है?
(a) Hematite / हेमेटाइट
(b) Lignite/ लिग्नाइट
(c) Bauxite / बॉक्साइट
(d) Magnetite / मैग्नेटाइट
निम्नलिखित में से कौन सा मुख्य रूप से एल्यूमिनियम के उत्पादन के लिए उपयोग किया जाता है?
(a) Hematite / हेमेटाइट
(b) Lignite/ लिग्नाइट
(c) Bauxite / बॉक्साइट
(d) Magnetite / मैग्नेटाइट
Show Answer
Ans.(c)
Sol. Bauxite is an ore of Aluminium, which is found in the form of Hydrated Aluminium Oxides. It consists mostly of the minerals gibbsite Al(OH)3, Boehmite γ – A1O(OH) and Diaspore α -A1O(OH) mixed with the two Iron Oxides Goethite and Haematite. The French geologist first discovered Bauxite near the village of les Baux, Southern France.
Sol. Bauxite is an ore of Aluminium, which is found in the form of Hydrated Aluminium Oxides. It consists mostly of the minerals gibbsite Al(OH)3, Boehmite γ – A1O(OH) and Diaspore α -A1O(OH) mixed with the two Iron Oxides Goethite and Haematite. The French geologist first discovered Bauxite near the village of les Baux, Southern France.
Q8. Match list-I with List-II and select the correct answer using the codes given below the lists
सूची-I के साथ सूची- II का मिलान कीजिए तथा सूचियों के नीचे दिए गए कोड का उपयोग करके सही उत्तर का चयन करें:
List-1/ सूची-1 List-II/ सूची-2
(Naturally occurring substance)/ (स्वाभाविक रूप से होने वाली पदार्थ) (Elements present)/ (मौजूद तत्व)
A. Diamond/ हीरा 1. Calcium/ कैल्शियम
B. Marble/ संगमरमर 2. Silicon/ सिलिकॉन
C. Sand/रेत 3. Aluminium oxide/ एल्युमीनियम ऑक्साइड
D. Ruby/ माणिक 4. Carbon/ कार्बन
Code : A B C D
(a) 3 1 2 4
(b) 4 2 1 3
(c) 2 1 3 4
(d) 4 1 2 3
सूची-I के साथ सूची- II का मिलान कीजिए तथा सूचियों के नीचे दिए गए कोड का उपयोग करके सही उत्तर का चयन करें:
List-1/ सूची-1 List-II/ सूची-2
(Naturally occurring substance)/ (स्वाभाविक रूप से होने वाली पदार्थ) (Elements present)/ (मौजूद तत्व)
A. Diamond/ हीरा 1. Calcium/ कैल्शियम
B. Marble/ संगमरमर 2. Silicon/ सिलिकॉन
C. Sand/रेत 3. Aluminium oxide/ एल्युमीनियम ऑक्साइड
D. Ruby/ माणिक 4. Carbon/ कार्बन
Code : A B C D
(a) 3 1 2 4
(b) 4 2 1 3
(c) 2 1 3 4
(d) 4 1 2 3
Show Answer
Ans.(d)
Sol. Diamond is a metastable Allotrope of Carbon where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Marble is a metamorphic rock composed mainly of crystalline Calcium Carbonate or Calcium Magnesium Carbonate. The most common component of sand is Silicon dioxide in the form of quartz. The earth’s land masses are made up of rocks and minerals. Ruby masses are made up of rocks and minerals. Ruby is considered as one of the four precious stones together with Sapphire, Emerald and Diamond. In Chemistry, the gemstone is a mixture of Aluminum, Oxygen and Chromium.
Sol. Diamond is a metastable Allotrope of Carbon where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Marble is a metamorphic rock composed mainly of crystalline Calcium Carbonate or Calcium Magnesium Carbonate. The most common component of sand is Silicon dioxide in the form of quartz. The earth’s land masses are made up of rocks and minerals. Ruby masses are made up of rocks and minerals. Ruby is considered as one of the four precious stones together with Sapphire, Emerald and Diamond. In Chemistry, the gemstone is a mixture of Aluminum, Oxygen and Chromium.
Q9. Which of the following is lighter than water?
निम्नलिखित में से कौन सा पानी से हल्का है?
(a) Aluminium/ एल्युमीनियम
(b) Sodium/ सोडियम
(c) Magnesium/ मैग्नीशियम
(d) Iron / आयरन
निम्नलिखित में से कौन सा पानी से हल्का है?
(a) Aluminium/ एल्युमीनियम
(b) Sodium/ सोडियम
(c) Magnesium/ मैग्नीशियम
(d) Iron / आयरन
Show Answer
Ans.(b)
Sol. Water has a defend density (gram per cubic centimeter) while the lightest metals mare lighter than water. They are Lithium 0.53gm/cm³, Potassium 0.862 g/cm³, sodium 0.971 g/cm³. These are malleable and highly reactive so they are impractical to use as the basis of an alloy with any structural utility.
Sol. Water has a defend density (gram per cubic centimeter) while the lightest metals mare lighter than water. They are Lithium 0.53gm/cm³, Potassium 0.862 g/cm³, sodium 0.971 g/cm³. These are malleable and highly reactive so they are impractical to use as the basis of an alloy with any structural utility.
Q10. Out of the following is not an alloy?
निम्नलिखित में से कौन सी एक मिश्र धातु नहीं है?
(a) Steel / स्टील
(b) Brass / पीतल
(c) Bronze / कांस्य
(d) Copper / कॉपर
निम्नलिखित में से कौन सी एक मिश्र धातु नहीं है?
(a) Steel / स्टील
(b) Brass / पीतल
(c) Bronze / कांस्य
(d) Copper / कॉपर
Show Answer
Ans.(d)
Sol. Copper is a metal, however steel, brass and bronze are alloys.
Sol. Copper is a metal, however steel, brass and bronze are alloys.
Q11. Which of the following gases is present under pressure in soft drinks?
निम्नलिखित में से कौन सी गैस सॉफ्ट ड्रिंक के दबाव में मौजूद होती है?
(a) Oxygen / ऑक्सीजन
(b) Nitrogen / नाइट्रोजन
(c) Carbon dioxide / कार्बन डाइऑक्साइड
(d) Nitrous oxide / नाइट्रस ऑक्साइड
निम्नलिखित में से कौन सी गैस सॉफ्ट ड्रिंक के दबाव में मौजूद होती है?
(a) Oxygen / ऑक्सीजन
(b) Nitrogen / नाइट्रोजन
(c) Carbon dioxide / कार्बन डाइऑक्साइड
(d) Nitrous oxide / नाइट्रस ऑक्साइड
Show Answer
Ans.(c)
Sol. Carbon dioxide is present under pressure in soft drinks. Carbon dioxide adds that special sparkle and bite to the beverage and also acts as a mild preservative. Carbon dioxide is an uniquely suitable gas for soft drinks because it is inert, non-toxic, and relatively inexpensive and easy to liquefy.
Sol. Carbon dioxide is present under pressure in soft drinks. Carbon dioxide adds that special sparkle and bite to the beverage and also acts as a mild preservative. Carbon dioxide is an uniquely suitable gas for soft drinks because it is inert, non-toxic, and relatively inexpensive and easy to liquefy.
Q12. The substance which does not expand on going from liquid state to solid state is
वह पदार्थ जो तरल अवस्था से ठोस अवस्था तक जाने पर फैलता नहीं है-
(a) Water / पानी
(b) Cast-iron / कच्चा लोहा
(c) Aluminium / एल्युमीनियम
(d) Type metal / टाइप मेटल
वह पदार्थ जो तरल अवस्था से ठोस अवस्था तक जाने पर फैलता नहीं है-
(a) Water / पानी
(b) Cast-iron / कच्चा लोहा
(c) Aluminium / एल्युमीनियम
(d) Type metal / टाइप मेटल
Show Answer
Ans.(d)
Sol. printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main constituent of these alloys. Antimony and tin are added to make the character produced durable and tough while reducing the difference between the coefficients of expansion of the matrix and the alloy. Pure metal melts and solidifies in a simple manner at a specific temperature. This is not the case with alloys.
Sol. printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main constituent of these alloys. Antimony and tin are added to make the character produced durable and tough while reducing the difference between the coefficients of expansion of the matrix and the alloy. Pure metal melts and solidifies in a simple manner at a specific temperature. This is not the case with alloys.
Q13. The radio-active element used in heart pacemakers is
हार्ट पेसमेकर में इस्तेमाल किये जाने वाला रेडियो-सक्रिय तत्व –
(a) Uranium / यूरेनियम
(b) Deuterium / ड्यूटेरियम
(c) Radium / रेडियम
(d) None of the above
हार्ट पेसमेकर में इस्तेमाल किये जाने वाला रेडियो-सक्रिय तत्व –
(a) Uranium / यूरेनियम
(b) Deuterium / ड्यूटेरियम
(c) Radium / रेडियम
(d) None of the above
Show Answer
Ans.(a)
Sol. Plutonium is formed in nuclear power reactors from uranium. Early heart pacemakers used Pu-238 as the power source.
Sol. Plutonium is formed in nuclear power reactors from uranium. Early heart pacemakers used Pu-238 as the power source.
Q14. The element which is commonly used in nuclear for producing electricity by nuclear fission is
परमाणु विखंडन द्वारा बिजली उत्पादन के लिए आमतौर पर उपयोग किया जाने वाला तत्व कौन सा है?
(a) Radium / रेडियम
(b) Plutonium/ प्लूटोनियम
(c) Uranium / यूरेनियम
(d) Deuterium / ड्यूटेरियम
परमाणु विखंडन द्वारा बिजली उत्पादन के लिए आमतौर पर उपयोग किया जाने वाला तत्व कौन सा है?
(a) Radium / रेडियम
(b) Plutonium/ प्लूटोनियम
(c) Uranium / यूरेनियम
(d) Deuterium / ड्यूटेरियम
Show Answer
Ans.(c)
Sol. Uranium is used to produce a chemical and nuclear reaction which makes a lot of heat. This heat is used to turn water into steam, which turns turbines…turbines generate electricity.
Sol. Uranium is used to produce a chemical and nuclear reaction which makes a lot of heat. This heat is used to turn water into steam, which turns turbines…turbines generate electricity.
Q15. Table salt gets moist during rainy season because
बरसात के मौसम में टेबल साल्ट नम क्यों हो जाता है?
(a) sodium chloride is hygroscopic / सोडियम क्लोराइड हाइग्रस्कापिक है.
(b) sodium chloride is deliquescent / सोडियम क्लोराइड देलिक़ुएस्केन्त है.
(c) sodium chloride contains some quantity of sodium iodide /सोडियम क्लोराइड में कुछ मात्रा सोडियम आयोडाइड की होती है.
(d) sodium chloride contains hygroscopic impurities like magnesium chloride / सोडियम क्लोराइड में मैग्नीशियम क्लोराइड जैसे हाइग्रोस्कोपिक अशुद्धताएं होती हैं
बरसात के मौसम में टेबल साल्ट नम क्यों हो जाता है?
(a) sodium chloride is hygroscopic / सोडियम क्लोराइड हाइग्रस्कापिक है.
(b) sodium chloride is deliquescent / सोडियम क्लोराइड देलिक़ुएस्केन्त है.
(c) sodium chloride contains some quantity of sodium iodide /सोडियम क्लोराइड में कुछ मात्रा सोडियम आयोडाइड की होती है.
(d) sodium chloride contains hygroscopic impurities like magnesium chloride / सोडियम क्लोराइड में मैग्नीशियम क्लोराइड जैसे हाइग्रोस्कोपिक अशुद्धताएं होती हैं
Show Answer
Ans.(d)
Sol. Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that make it free-flowing (anticaking agents) such as sodium aluminosilicate or magnesium carbonate. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.
Sol. Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that make it free-flowing (anticaking agents) such as sodium aluminosilicate or magnesium carbonate. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.
