General Science Questions for Railway 2018:
Dear Students,
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. The exam will be conducted in the months of April and May 2018.
Q1. The colour of the star is an indication of its:
स्टार का रंग किसका एक संकेत है:
(a) Distance from the earth / पृथ्वी से दूरी
(b) Temperature / तापमान
(c) Luminosity / चमक
(d) Distance from the sun / सूर्य से दूरी
Q2. Light from the Sun reaches Earth in about:
सूर्य से प्रकाश पृथ्वी पर कितने समय में पहुंचता है
(a) 2 minutes /मिनट
(b) 4 minutes / मिनट
(c) 8 minutes / मिनट
(d) 16 minutes/ मिनट
Q3. Which of the following is NOT one of the important steps in processing tea leaves?
निम्नलिखित में से क्या चाय पत्तियों को प्रौद्योगिकी करने में महत्वपूर्ण कदमों में से एक नहीं है ?
(a) Rolling /रोलिंग
(b) Drying / ड्राईंग
(c) Fermenting /फेर्मेंटेटिंग
(d) Withering /विथरिंग
Q4. Dehydration in human body is caused due to the loss of:
मानव शरीर में निर्जलीकरण से क्या हो सकता है:
(a) vitamins /विटामिन
(b) salts /लवण
(c) hormones / हार्मोन
(d) water / पानी
Q5. Full form of C.F.I. is-
C.F.I. का क्या अर्थ है-
(a) Compact Fluorescent Lamp
(b) Centrally Fixed Lamp
(c) Chemical Fluorescent Lamp
(d) Condensed Fluorescent Lamp
Q6. The age of trees is determined by its:
वृक्षों की आयु किसके द्वारा निर्धारित की जाती है:
(a) girth /गीर्थ
(b) height /ऊंचाई
(c) growth rings / वृद्धि के छल्ले
(d) general appearance / सामान्य दिखावट
Q7. Kidney disease in man is caused by the pollutant:
मानव में किडनी रोग किस प्रदूषक के कारण होता है
(a) Cadmium / कैडमियम
(b) Iron /आयरन
(c) Cobalt / कोबाल्ट
(d) Carbon / कार्बन
Q8. Principle of fuse is :
फ़्यूज़ का क्या सिद्धांत है:
(a) Chemical effect of electricity / बिजली का रासायनिक प्रभाव
(b) Mechanical effect of electricity / बिजली का रासायनिक प्रभाव
(c) Heating effect of electricity / बिजली का ताप प्रभाव
(d) Magnetic effect of electricity / बिजली का चुंबकीय प्रभाव
Q9. In SI units the unit of power of a lens is
एक लेंस की शक्ति की एसआई इकाई क्या है:
(a) Metre /मीटर
(b) Poundem /पौन्डेम
(c) Watt/वाट
(d) Diopter/डायप्टर
Q10. Reserpine is used to:
रीस्पॉइन का उपयोग किसके लिए किया जाता है
(a) reduce high blood pressure / उच्च रक्तचाप को कम करने
(b) increase blood pressure when it is low / कम रक्तचाप को बढाने के लिए
(c) alleviate pain / दर्द कम करने के लिए
(d) cure arthritis / गठिया के इलाज के लिए
Q11. ‘ELISA’ test is employed to diagnose:
‘एलिसा' परीक्षण किसके निदान करने के लिए नियोजित किया जाता है:
(a) Polio virus / पोलियो वायरस
(b) AIDS / एड्स
(c) Tuberculosis bacterium / क्षय रोग जीवाणु
(d) Cancer / कैंसर
Q12. Why excessive heating and repeated use of cooking oil is most undesirable?
अत्यधिक गर्मी और खाना पकाने के तेल का दोहरा उपयोग सबसे अवांछनीय क्यों है?
(a) The oil vapours can cause indoor pollution / तेल वाष्प इनडोर प्रदूषण का कारण बन सकता है
(b) Carcinogenic substances like benzpyrene are produced / बेंस्पीरेन जैसे कासिनोजेनिक पदार्थ उत्पन्न होते हैं
(c) Nutrient value of food is lost / भोजन का पोषक तत्व खत्म हो जाता है
(d) Loss and wastage of oil / तेल की हानि और अपव्यय
Q14. The primary colours used in a colour TV are:
एक रंगीन टीवी में प्रयुक्त प्राथमिक रंग क्या हैं:
(a) Green, Yellow, Violet / हरा, पीला, बैंगनी
(b) Violet, Red, Orange / बैंगनी, लाल, संतरी
(c) Blue, Green, Red / नीला, हरा, लाल
(d) Blue, Green, Violet/ नीला, हरा ,बैंगनी
Q15. Maximum photosynthetic activity occurs in:
अधिकतम प्रकाश संश्लेषण गतिविधि कहाँ होती है:
(a) blue and red region of light / प्रकाश के नीले और लाल क्षेत्र में
(b) green and yellow region of light / प्रकाश के हरे और पीले क्षेत्र में
(c) blue and orange region of light / प्रकाश के नीले और संतरी क्षेत्र में
(d) violet and orange region of light / प्रकाश के बैंगनी और संतरी क्षेत्र में
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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. The exam will be conducted in the months of April and May 2018.
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. परीक्षा अप्रैल और मई 2018 के महीने में आयोजित की जायेगी.
Q1. The colour of the star is an indication of its:
स्टार का रंग किसका एक संकेत है:
(a) Distance from the earth / पृथ्वी से दूरी
(b) Temperature / तापमान
(c) Luminosity / चमक
(d) Distance from the sun / सूर्य से दूरी
Show Answer
Ans.(b)
Sol. The colour of the stars reflects the age of stars. Colour is reflected from the temperature is high, then the star is young. The star will be blue during young stage which indicates high temperature. If star is red the temperature is low.
Sol. The colour of the stars reflects the age of stars. Colour is reflected from the temperature is high, then the star is young. The star will be blue during young stage which indicates high temperature. If star is red the temperature is low.
Q2. Light from the Sun reaches Earth in about:
सूर्य से प्रकाश पृथ्वी पर कितने समय में पहुंचता है
(a) 2 minutes /मिनट
(b) 4 minutes / मिनट
(c) 8 minutes / मिनट
(d) 16 minutes/ मिनट
Show Answer
Ans.(c)
Sol. The sunlight takes about 500 second or 8 minutes (apx) to reach to the earth.
Sol. The sunlight takes about 500 second or 8 minutes (apx) to reach to the earth.
Q3. Which of the following is NOT one of the important steps in processing tea leaves?
निम्नलिखित में से क्या चाय पत्तियों को प्रौद्योगिकी करने में महत्वपूर्ण कदमों में से एक नहीं है ?
(a) Rolling /रोलिंग
(b) Drying / ड्राईंग
(c) Fermenting /फेर्मेंटेटिंग
(d) Withering /विथरिंग
Show Answer
Ans.(c)
Sol. Generally, there are four different tea categories that differ in processing methods. By withering, new picked leaves are thinly spread to dry during this process. Heated air is forced over the leaves if the climate is not suitable. The main goal of this process is to reduce the water content. By the end of withering, the leaves should be pliable enough to be rolled. From the withering racks, the leaves are now twisted and rolled so that the leaf cells are broken up. Oxidation is a bio-chemical process where oxygen is absorbed. It begins once the leaf membranes are broken during the rolling process. Oxidation causes the leaves to turn bright copper in color. During the stage of drying or firing, the leaves are dried evenly and thoroughly without being burnt. Firing the leaves stops the oxidation process.
Sol. Generally, there are four different tea categories that differ in processing methods. By withering, new picked leaves are thinly spread to dry during this process. Heated air is forced over the leaves if the climate is not suitable. The main goal of this process is to reduce the water content. By the end of withering, the leaves should be pliable enough to be rolled. From the withering racks, the leaves are now twisted and rolled so that the leaf cells are broken up. Oxidation is a bio-chemical process where oxygen is absorbed. It begins once the leaf membranes are broken during the rolling process. Oxidation causes the leaves to turn bright copper in color. During the stage of drying or firing, the leaves are dried evenly and thoroughly without being burnt. Firing the leaves stops the oxidation process.
Q4. Dehydration in human body is caused due to the loss of:
मानव शरीर में निर्जलीकरण से क्या हो सकता है:
(a) vitamins /विटामिन
(b) salts /लवण
(c) hormones / हार्मोन
(d) water / पानी
Show Answer
Ans.(d)
Sol. Dehydration is the condition where there is acute shortage of water in our body. This occurs when the amount of water leaving our body is greater than the amount consumed.
Sol. Dehydration is the condition where there is acute shortage of water in our body. This occurs when the amount of water leaving our body is greater than the amount consumed.
Q5. Full form of C.F.I. is-
C.F.I. का क्या अर्थ है-
(a) Compact Fluorescent Lamp
(b) Centrally Fixed Lamp
(c) Chemical Fluorescent Lamp
(d) Condensed Fluorescent Lamp
Show Answer
Ans.(a)
Sol. C.F.L. is short for Compact Fluorescent Lamp
Sol. C.F.L. is short for Compact Fluorescent Lamp
Q6. The age of trees is determined by its:
वृक्षों की आयु किसके द्वारा निर्धारित की जाती है:
(a) girth /गीर्थ
(b) height /ऊंचाई
(c) growth rings / वृद्धि के छल्ले
(d) general appearance / सामान्य दिखावट
Show Answer
Ans.(c)
Sol. Growth rings can determine the age of the trees. Growth rings, also referred to as tree rings or annual rings, can be seen in a horizontal cross section cut through the trunk of a tree. Growth rings are the result of new growth in the vascular cambium, a layer of cells near the bark that is classified as a lateral meristem. These visible rings result from the change in growth speed through the seasons of the year, thus one ring usually marks the passage of one year in the life of the tree.
Sol. Growth rings can determine the age of the trees. Growth rings, also referred to as tree rings or annual rings, can be seen in a horizontal cross section cut through the trunk of a tree. Growth rings are the result of new growth in the vascular cambium, a layer of cells near the bark that is classified as a lateral meristem. These visible rings result from the change in growth speed through the seasons of the year, thus one ring usually marks the passage of one year in the life of the tree.
Q7. Kidney disease in man is caused by the pollutant:
मानव में किडनी रोग किस प्रदूषक के कारण होता है
(a) Cadmium / कैडमियम
(b) Iron /आयरन
(c) Cobalt / कोबाल्ट
(d) Carbon / कार्बन
Show Answer
Ans.(a)
Sol. Cadmium (Cd), a by-product of zinc production, is one of the most toxic elements to which man can be exposed at work or in the environment. Once absorbed, Cd is efficiently retained in the human body, in which it accumulates throughout life. Cd is primarily toxic to the kidney, especially to theproximal tubular cells, the main site of accumulation. Cadmium accumulates in the kidneys and may sometimes cause kidney failure when it is in excess.
Sol. Cadmium (Cd), a by-product of zinc production, is one of the most toxic elements to which man can be exposed at work or in the environment. Once absorbed, Cd is efficiently retained in the human body, in which it accumulates throughout life. Cd is primarily toxic to the kidney, especially to theproximal tubular cells, the main site of accumulation. Cadmium accumulates in the kidneys and may sometimes cause kidney failure when it is in excess.
Q8. Principle of fuse is :
फ़्यूज़ का क्या सिद्धांत है:
(a) Chemical effect of electricity / बिजली का रासायनिक प्रभाव
(b) Mechanical effect of electricity / बिजली का रासायनिक प्रभाव
(c) Heating effect of electricity / बिजली का ताप प्रभाव
(d) Magnetic effect of electricity / बिजली का चुंबकीय प्रभाव
Show Answer
Ans.(c)
Sol. The electric fuse works on the principle of the heating effect of electric current. It consists of a piece of wire made of a metal or an alloy of low melting point. As the current increases beyond a limit, the wire in the electric fuse melts and breaks off
Sol. The electric fuse works on the principle of the heating effect of electric current. It consists of a piece of wire made of a metal or an alloy of low melting point. As the current increases beyond a limit, the wire in the electric fuse melts and breaks off
Q9. In SI units the unit of power of a lens is
एक लेंस की शक्ति की एसआई इकाई क्या है:
(a) Metre /मीटर
(b) Poundem /पौन्डेम
(c) Watt/वाट
(d) Diopter/डायप्टर
Show Answer
Ans.(d)
Sol. S.I unit of power is diopter.
Sol. S.I unit of power is diopter.
Q10. Reserpine is used to:
रीस्पॉइन का उपयोग किसके लिए किया जाता है
(a) reduce high blood pressure / उच्च रक्तचाप को कम करने
(b) increase blood pressure when it is low / कम रक्तचाप को बढाने के लिए
(c) alleviate pain / दर्द कम करने के लिए
(d) cure arthritis / गठिया के इलाज के लिए
Show Answer
Ans.(a)
Sol. Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
Sol. Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
Q11. ‘ELISA’ test is employed to diagnose:
‘एलिसा' परीक्षण किसके निदान करने के लिए नियोजित किया जाता है:
(a) Polio virus / पोलियो वायरस
(b) AIDS / एड्स
(c) Tuberculosis bacterium / क्षय रोग जीवाणु
(d) Cancer / कैंसर
Show Answer
Ans.(b)
Sol. An enzyme-linked immunosorbent assay, also called ELISA or EIA, is a test that detects and measures antibodies in your blood. ... Antibodies are proteins that your body produces in response to harmful substances called antigens. An ELISA test may be used to diagnose: HIV, which causes AIDS.
Sol. An enzyme-linked immunosorbent assay, also called ELISA or EIA, is a test that detects and measures antibodies in your blood. ... Antibodies are proteins that your body produces in response to harmful substances called antigens. An ELISA test may be used to diagnose: HIV, which causes AIDS.
Q12. Why excessive heating and repeated use of cooking oil is most undesirable?
अत्यधिक गर्मी और खाना पकाने के तेल का दोहरा उपयोग सबसे अवांछनीय क्यों है?
(a) The oil vapours can cause indoor pollution / तेल वाष्प इनडोर प्रदूषण का कारण बन सकता है
(b) Carcinogenic substances like benzpyrene are produced / बेंस्पीरेन जैसे कासिनोजेनिक पदार्थ उत्पन्न होते हैं
(c) Nutrient value of food is lost / भोजन का पोषक तत्व खत्म हो जाता है
(d) Loss and wastage of oil / तेल की हानि और अपव्यय
Show Answer
Ans.(b)
Sol. Heating an oil changes its characteristics and this means that oils regarded as being healthy at room temperature can become unhealthy when heated above certain temperatures. The smoking point is the temperatures. The smoking point is the temperature at which a particular fat or oil starts to smoke and break down creating acreolein, an Carcinogenic substances like benzpyrene are produced.
Sol. Heating an oil changes its characteristics and this means that oils regarded as being healthy at room temperature can become unhealthy when heated above certain temperatures. The smoking point is the temperatures. The smoking point is the temperature at which a particular fat or oil starts to smoke and break down creating acreolein, an Carcinogenic substances like benzpyrene are produced.
Q13. Clove, the commonly used spice, is obtained from the:
लौंग, आमतौर पर उपयोग किये जाने वाला मसाला, किससे प्राप्त होता है:
(a) root /जड़
(b) stem /तना
(c) flower bud / फुल की कलि
(d) fruit /फल
लौंग, आमतौर पर उपयोग किये जाने वाला मसाला, किससे प्राप्त होता है:
(a) root /जड़
(b) stem /तना
(c) flower bud / फुल की कलि
(d) fruit /फल
Show Answer
Ans.(c)
Sol. Cloves are the aromatic dried flower buds of a tree in the family Myrtaceae. The clove tree is an evergreen that grows to a height ranging from 8-12 m, having large leaves and sanguine flowers in numerous groups of terminal clusters. The flower buds are at first of a pale colour and gradually become green, after which they develop into a bright red, when they are ready for collecting.
Sol. Cloves are the aromatic dried flower buds of a tree in the family Myrtaceae. The clove tree is an evergreen that grows to a height ranging from 8-12 m, having large leaves and sanguine flowers in numerous groups of terminal clusters. The flower buds are at first of a pale colour and gradually become green, after which they develop into a bright red, when they are ready for collecting.
Q14. The primary colours used in a colour TV are:
एक रंगीन टीवी में प्रयुक्त प्राथमिक रंग क्या हैं:
(a) Green, Yellow, Violet / हरा, पीला, बैंगनी
(b) Violet, Red, Orange / बैंगनी, लाल, संतरी
(c) Blue, Green, Red / नीला, हरा, लाल
(d) Blue, Green, Violet/ नीला, हरा ,बैंगनी
Show Answer
Ans.(c)
Sol. In electronic visual displays, the Primary colours normally used are red, green and blue. Primary colours are sets of colours that can be combined to make a useful range of colours.
Sol. In electronic visual displays, the Primary colours normally used are red, green and blue. Primary colours are sets of colours that can be combined to make a useful range of colours.
Q15. Maximum photosynthetic activity occurs in:
अधिकतम प्रकाश संश्लेषण गतिविधि कहाँ होती है:
(a) blue and red region of light / प्रकाश के नीले और लाल क्षेत्र में
(b) green and yellow region of light / प्रकाश के हरे और पीले क्षेत्र में
(c) blue and orange region of light / प्रकाश के नीले और संतरी क्षेत्र में
(d) violet and orange region of light / प्रकाश के बैंगनी और संतरी क्षेत्र में
Show Answer
Ans.(a)
Sol. Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photosynthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls. Red light favours more carbohydrate accumulation while blue light favours more protein synthesis.
Sol. Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photosynthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls. Red light favours more carbohydrate accumulation while blue light favours more protein synthesis.
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