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. The time taken to reach the Sunlight up to the surface of earth is approximately-
सूर्य के प्रकाश को पृथ्वी की सतह तक पहुचने में लगभग कितना समय लगता है?
(a) 4.2 sec /4.2 सेकेंड
(b) 4.8 sec /4.8 सेकंड
(c) 8.5 minutes/ 8.5 मिनट
(d) 3.6 hrs. /3.6 घंटे
Show Answer
Ans.(c)
Sol. The sunlight takes about 500 second or 8.5 minutes to reach to the earth.
Sol. The sunlight takes about 500 second or 8.5 minutes to reach to the earth.
Q2. What was the fissionable material used in the bombs dropped at Nagasaki (Japan) in the year 1945?
वर्ष 1945 में नागासाकी (जापान) में गिराए गए बमों में इस्तेमाल होने वाली विखंडनीय सामग्री क्या थी?
(a) Sodium / सोडियम
(b) Potassium / पोटैशियम
(c) Plutonium /प्लूटोनियम
(d) Iron/लोहा
Show Answer
Ans.(c)
Sol. ‘Fat Man’ was the code name for the type of bomb which was dropped on the Japanese city of Nagasaki by the United States of America. Plutonium was used as fissionable material in this bomb.
Sol. ‘Fat Man’ was the code name for the type of bomb which was dropped on the Japanese city of Nagasaki by the United States of America. Plutonium was used as fissionable material in this bomb.
Q3. GPS stands for which one of the following?
निम्नलिखित में से GPS का पूर्ण रूप क्या है?
(a) Greenwich Polar Satellite
(b) Global Police Surveillance
(c) Global Positioning System
(d) General Pacific Survey
Show Answer
Ans.(c)
Sol. GPS means Global Positioning System, is a space-based navigation system. It was developed by the U.S. Department of defence.
Sol. GPS means Global Positioning System, is a space-based navigation system. It was developed by the U.S. Department of defence.
Q4. 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
Show Answer
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”.
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”.
Q5. Who is the discoverer of Penicillin?
पेनिसिलिन का आविष्कार किसने किया था?
(a) Alexander Graham Bell / अलेक्जेंडर ग्राहम बेल
(b) Alexander Fleming / अलेक्जेंडर फ्लेमिंग
(c) Christopher Macdonald/ क्रिस्टोफर मैकडोनाल्ड
(d) Albert Einstein / अल्बर्ट आइंस्टीन
Show Answer
Ans.(b)
Sol. Penicillin was discovered by Scottish scientist Alexander Fleming.
Sol. Penicillin was discovered by Scottish scientist Alexander Fleming.
Q6. Ampere is the unit of-
एम्पियर किसकी इकाई है
(a) Voltage / विद्युत दाब
(b) Electric current / विद्युत प्रवाह
(c) Resistance / प्रतिरोध
(d) Power / शक्ति
Show Answer
Ans.(b)
Sol. Ampere is unit to measure electric current. If one Ampere current is flowing in any conducting wire, it means 6.28×1018 electrons are entering per second from one direction and same amount of electrons flows from the other end per second.
Sol. Ampere is unit to measure electric current. If one Ampere current is flowing in any conducting wire, it means 6.28×1018 electrons are entering per second from one direction and same amount of electrons flows from the other end per second.
Q7. One pikogram is equal to-
1 किलोग्राम बराबर है-
(a) 10(-6) gram /10(-6) किलोग्राम
(b) 10(-9) gram /10(-9) किलोग्राम
(c) 10(-12) gram /10(-12) किलोग्राम
(d) 10 (-15) gram /10 (-15) किलोग्राम
Show Answer
Ans.(c)
Sol. The smaller units of measuring mass are Milligram, Microgram, Pikogram and Femtogram.
1 Pikogram = 10-12 gram
Sol. The smaller units of measuring mass are Milligram, Microgram, Pikogram and Femtogram.
1 Pikogram = 10-12 gram
Q8. The apparatus used to measure the intensity of light is known is-
प्रकाश की तीव्रता को मापने के लिए इस्तेमाल किया जाने वाला उपकरण है -
(a) Anemometer / एनीमोमीटर
(b) Colorimeter /वर्णमापक
(c) Photometer / फोटोमीटर
(d) Altimeter /तुंगतामापी
Show Answer
Ans.(c)
Sol. Photometer is used to measure the intensity of light.
Sol. Photometer is used to measure the intensity of light.
ऊर्जा संरक्षण का अर्थ है-
(a) Generation and destruction of energy /ऊर्जा का उत्पादन और विनाश
(b) Energy could be created /ऊर्जा को बनाया जा सकता है
(c) Energy could not be created but destroyed /ऊर्जा को बनाया नहीं जा सकता लेकिन नष्ट किया जा सकता है
(d) Energy can neither be created nor destroyed /ऊर्जा को न तो बनाया जा सकता है न ही नष्ट किया जा सकता है
Show Answer
Ans.(d)
Sol. Energy conservation refers to the reducing of energy consumption through using less of an energy service.
Sol. Energy conservation refers to the reducing of energy consumption through using less of an energy service.
Q10. If a person sitting in a lift then when will he feel that his weight gets increased?
यदि कोई व्यक्ति लिफ्ट में बैठा है, तो उसे कब महसूस होगा कि उसका वजन बढ़ गया है?
(a) When the elevator going upward expeditiously/जब एलेवेटर तेजी से ऊपर की तरफ बढ़ रहा है
(b) When the elevator going down expeditiously. /जब एलेवेटर तेजी से नीचे जा रहा है
(c) Going upward with constant velocity. /जब एलेवेटर निरंतर वेग के साथ ऊपर जा रहा हैं.
(d) Going downward with constant velocity. / जब एलेवेटर निरंतर वेग के साथ नीचे जा रहा हैं.
Show Answer
Ans.(a)
Sol. It is clear that when the elevator is going upwards a person actually feels a little heavier than his usual weight and on the other hand when elevator accelerates downward then a person feels a little reduction than his usual weight.
Sol. It is clear that when the elevator is going upwards a person actually feels a little heavier than his usual weight and on the other hand when elevator accelerates downward then a person feels a little reduction than his usual weight.
मंथन द्वारा दूध से क्रीम का पृथक्करण _______ के कारण होता है:
(a) Gravitational force / गुरुत्वाकर्षण बल
(b) Cohesive force / एकजुट बल
(c) Centrifugal force / अभिकेन्द्रीय बल
(d) None of the above /उपरोक्त में से कोई नहीं
Show Answer
Ans.(c)
Sol. The seperation of cream from milk by churning is due to centrifugal force.
Sol. The seperation of cream from milk by churning is due to centrifugal force.
Q12. The speed of light is–
प्रकाश की गति है-
(a) 9×102 m/sec
(b) 3×1011 m/sec
(c) 3×108 m/sec
(d) 2×104 m/sec
प्रकाश की गति है-
(a) 9×102 m/sec
(b) 3×1011 m/sec
(c) 3×108 m/sec
(d) 2×104 m/sec
Show Answer
Ans.(c)
Sol. The speed of light in a vacuum is 3.00 × 108 m/s, while the speed of sound in vacuum is zero and in air is 343 m/sec.
Sol. The speed of light in a vacuum is 3.00 × 108 m/s, while the speed of sound in vacuum is zero and in air is 343 m/sec.
Q13. The Sky appears blue due to-
आकाश किस कारण नीले रंग का दिखता है -
(a) Blue color is scattered most /नीला रंग सबसे ज्यादा फैलता है
(b) The red color is scattered most /लाल रंग सबसे ज्यादा फैलता है
(c) Blue light is minimum absorbed by atmosphere/ नीला रंग वातावरण द्वारा सबसे कम अवशोषित किया जाता है
(d) Red light is ultimately absorbed by atmosphere/लाल रंग वातावरण द्वारा अंततः अवशोषित किया जाता है
आकाश किस कारण नीले रंग का दिखता है -
(a) Blue color is scattered most /नीला रंग सबसे ज्यादा फैलता है
(b) The red color is scattered most /लाल रंग सबसे ज्यादा फैलता है
(c) Blue light is minimum absorbed by atmosphere/ नीला रंग वातावरण द्वारा सबसे कम अवशोषित किया जाता है
(d) Red light is ultimately absorbed by atmosphere/लाल रंग वातावरण द्वारा अंततः अवशोषित किया जाता है
Show Answer
Ans.(a)
Sol. Blue light which has the least wavelength of all the visible radiations is scattered most. The blue appearance of the sky is due to scattered light which enters the eyes.
Sol. Blue light which has the least wavelength of all the visible radiations is scattered most. The blue appearance of the sky is due to scattered light which enters the eyes.
Q14. For shaving, one uses-
शेविंग के लिए, एक का उपयोग करता है -
(a) Concave mirror/अवतल दर्पण
(b) Plain mirror /समतल दर्पण
(c) Convex mirror /उत्तल दर्पण
(d) None of these / इनमें से कोई नहीं
शेविंग के लिए, एक का उपयोग करता है -
(a) Concave mirror/अवतल दर्पण
(b) Plain mirror /समतल दर्पण
(c) Convex mirror /उत्तल दर्पण
(d) None of these / इनमें से कोई नहीं
Show Answer
Ans.(a)
Sol. People use a concave mirror for shaving because when a man standing between the principal focus and pole of a concave mirror, he sees as enlarged, the erect and virtual image of his face.
Sol. People use a concave mirror for shaving because when a man standing between the principal focus and pole of a concave mirror, he sees as enlarged, the erect and virtual image of his face.
Q15. Which of the following lens is used to minimize Myopia?
निम्न में से कौन सा लेंस मायोपिया को कम करने के लिए उपयोग किया जाता है?
(a) Convex lens /उत्तल लेंस
(b) Concave lens / अंतराल लेंस
(c) Cylindrical lens /बेलनाकार लेंस
(d) None of these/इनमें से कोई नहीं
निम्न में से कौन सा लेंस मायोपिया को कम करने के लिए उपयोग किया जाता है?
(a) Convex lens /उत्तल लेंस
(b) Concave lens / अंतराल लेंस
(c) Cylindrical lens /बेलनाकार लेंस
(d) None of these/इनमें से कोई नहीं
Show Answer
Ans.(b)
Sol. A concave lens is used to remove the defect of myopia.
Sol. A concave lens is used to remove the defect of myopia.
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