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. Warm-blooded animals are those which are able to keep their body temperature :-
गर्म खून वाले जानवर वे हैं जो अपने शरीर के तापमान को _______ रखने में सक्षम हैं: -
(a) Lower than environment / पर्यावरण से निम्न
(b) Higher than environment/ पर्यावरण से उच्च
(c) Constant temperature all time / हर समय निरंतर
(d) Equal to the atmospheric temperature / वायुमंडलीय तापमान के बराबर
Ans.(c)
Sol. Warm-blooded creatures like mammals and birds are able to keep their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment and by cooling themselves in a hotter environment. This process of maintaining a consistent environment inside the body is called homeostasis.
Sol. Warm-blooded creatures like mammals and birds are able to keep their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment and by cooling themselves in a hotter environment. This process of maintaining a consistent environment inside the body is called homeostasis.
Q2. Which is the largest organ in human beings?
मनुष्य के शरीर का सबसे बड़ा अंग कौन सा है?
(a) Skin/ त्वचा
(b) Large Intestine/ बड़ी आँत
(c) Small Intestine/ छोटी आंत
(d) Liver/ यकृत
Show Answer
Ans.(a)
Sol. The skin is the largest organ of the body, with a total area of about 20 square feet. The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.
Q3. Of the following which one is not a fish? Sol. The skin is the largest organ of the body, with a total area of about 20 square feet. The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.
निम्नलिखित में से कौन एक मछली नहीं है?
(a) Starfish/स्टारफिश
(b) Sawfish/सॉफ़िश
(c) Pipefish/पाइपफ़िश
(d) Guitarfish/गिटारफिश
Show Answer
Ans.(a)
Sol. Starfish popularly called sea stars are related to the phylum Echinodermata while true fishes belong to the phylum Chordata. Starfish do not have gills, scales or fins which are basic characteristics of fishes.
Sol. Starfish popularly called sea stars are related to the phylum Echinodermata while true fishes belong to the phylum Chordata. Starfish do not have gills, scales or fins which are basic characteristics of fishes.
Q4. Mammals respire by:
स्तनपायी किसके द्वारा श्वास लेते है:
(a) Gills / गलफड़ा
(b) Trachea /श्वासप्रणाल
(c) Skin / त्वचा
(d) Lungs / फेफड़े
Show Answer
Ans.(d)
Sol. The lungs are the primary organ for respiration in mammals. In mammals, two lungs are located near the backbone on either side of the heart. Its function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange.
Sol. The lungs are the primary organ for respiration in mammals. In mammals, two lungs are located near the backbone on either side of the heart. Its function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange.
Q5. How do most insects respire?
अधिकांश कीड़े कैसे सांस लेते हैं?
(a) Through skin / त्वचा के माध्यम से
(b) Through gills / गिल के माध्यम से
(c) By lungs / फेफड़ों द्वारा
(d) By tracheal system / सांस की नली द्वारा
Show Answer
Ans.(d)
Sol. Insects require oxygen to live and produce carbon dioxide as a waste product just as we do. They do not have lungs nor do they transport oxygen through their circulatory systems. Instead, insects use a series of tubes called a tracheal system to perform oxygen exchange throughout the body.
Sol. Insects require oxygen to live and produce carbon dioxide as a waste product just as we do. They do not have lungs nor do they transport oxygen through their circulatory systems. Instead, insects use a series of tubes called a tracheal system to perform oxygen exchange throughout the body.
Q6. Redness in apple is due to-
सेब के लाल रंग का कारण है-
(a) Anthocyanin / एंथोसाइनिन
(b) Lycopene / लाइकोपीन
(c) Carotene / कैरोटीन
(d) Xanthophyll /जैन्थोफिल
Show Answer
Ans.(a)
Sol. Anthocyanins are the pigment compounds and responsible for red, purple and blue colours in many fruits and vegetables. Lycopene pigment is red colour like tomato, carotene in carrot and xanthophyll pigment present in beetroot.
Sol. Anthocyanins are the pigment compounds and responsible for red, purple and blue colours in many fruits and vegetables. Lycopene pigment is red colour like tomato, carotene in carrot and xanthophyll pigment present in beetroot.
Q7. Mushroom used in for making juicy vegetable is a-
मशरूम का उपयोग रसदार सब्जी बनाने के लिए किया जाता है. मशरूम क्या है ?
(a) Fungus / कवक
(b) Alga / अल्गा
(c) Green vegetable / हरी सब्जी
(d) Flesh of animal / पशु का मांस
मशरूम का उपयोग रसदार सब्जी बनाने के लिए किया जाता है. मशरूम क्या है ?
(a) Fungus / कवक
(b) Alga / अल्गा
(c) Green vegetable / हरी सब्जी
(d) Flesh of animal / पशु का मांस
Show Answer
Ans.(a)
Sol. Mushroom is a fungus which is used as a vegetable for food.
Sol. Mushroom is a fungus which is used as a vegetable for food.
Q8. Major component of cotton is-
कपास का प्रमुख घटक है-
(a) Protein / प्रोटीन
(b) Fatty acid / फैटी एसिड
(c) Cellulose / सेलूलोज
(d) Glycerene / ग्लिसरीन
कपास का प्रमुख घटक है-
(a) Protein / प्रोटीन
(b) Fatty acid / फैटी एसिड
(c) Cellulose / सेलूलोज
(d) Glycerene / ग्लिसरीन
Show Answer
Ans.(c)
Sol. The Major chemical composition of linseed (cotton) is -
Cellulose – 91%
Sol. The Major chemical composition of linseed (cotton) is -
Cellulose – 91%
Q9. Lichen are the complex creature, made from-
लाइकेन जटिल प्राणी हैं, जो_________से बनी होती है.
(a) Fungus and Bacteria / कवक और जीवाणु
(b) Fungus and Algae / कवक और शैवाल
(c) Fungus and Bryophyta / कवक और ब्रायॉफीटा
(d) Algae and Bacteria / शैवाल और जीवाणु
लाइकेन जटिल प्राणी हैं, जो_________से बनी होती है.
(a) Fungus and Bacteria / कवक और जीवाणु
(b) Fungus and Algae / कवक और शैवाल
(c) Fungus and Bryophyta / कवक और ब्रायॉफीटा
(d) Algae and Bacteria / शैवाल और जीवाणु
Show Answer
Ans.(b)
Sol. Lichen is a dual plant made from completely different plants fungus and algae. But lichen seems as one plant because of their close combination.
Sol. Lichen is a dual plant made from completely different plants fungus and algae. But lichen seems as one plant because of their close combination.
Q10. Mendel’s principle of inheritance is based on-
मेंडल सिद्धांत विरासत निम्न में से किस पर आधारित है?
(a) Vegetative reproduction / वनस्पति प्रजनन
(b) Asexual reproduction / असभ्य प्रजनन
(c) Sexual reproduction / यौन प्रजनन
(d) All of the above / उपरोक्त सभी
मेंडल सिद्धांत विरासत निम्न में से किस पर आधारित है?
(a) Vegetative reproduction / वनस्पति प्रजनन
(b) Asexual reproduction / असभ्य प्रजनन
(c) Sexual reproduction / यौन प्रजनन
(d) All of the above / उपरोक्त सभी
Show Answer
Ans.(c)
Sol. Mendel’s principle of inheritance is based on sexual reproduction.
Sol. Mendel’s principle of inheritance is based on sexual reproduction.
Q11. The number of chromosome pairs, found in the cells of human body is-
मानव शरीर की कोशिकाओं में पाए जाने वाले गुणसूत्र जोड़े की संख्या कितनी है?
(a) 21
(b) 22
(c) 23
(d) 24
मानव शरीर की कोशिकाओं में पाए जाने वाले गुणसूत्र जोड़े की संख्या कितनी है?
(a) 21
(b) 22
(c) 23
(d) 24
Show Answer
Ans.(c)
Sol. In humans, each cell normally contains 23 pairs of chromosomes, a total of 46. Twenty-two of these pairs called autosomes which are the same in both males and females. The 23rd pair, the sex chromosomes differ between males and females. Females have two copies of the X chromosome (XX) while males have one X and one Y chromosome (XY).
Sol. In humans, each cell normally contains 23 pairs of chromosomes, a total of 46. Twenty-two of these pairs called autosomes which are the same in both males and females. The 23rd pair, the sex chromosomes differ between males and females. Females have two copies of the X chromosome (XX) while males have one X and one Y chromosome (XY).
Q12. Which of the following species is the largest of the ‘toothed-whales?
निम्नलिखित में से कौन सी प्रजाति 'दांतदार व्हेल' में सबसे बड़ी है?
(a) Finback whale / फ़िनबैक व्हेल
(b) Blue whale / ब्लू व्हेल
(c) Sperm whale / स्पर्म व्हेल
(d) Humpback whale / हंपबैक व्हेल
निम्नलिखित में से कौन सी प्रजाति 'दांतदार व्हेल' में सबसे बड़ी है?
(a) Finback whale / फ़िनबैक व्हेल
(b) Blue whale / ब्लू व्हेल
(c) Sperm whale / स्पर्म व्हेल
(d) Humpback whale / हंपबैक व्हेल
Show Answer
Ans.(c)
Sol. The sperm whale (Physeter macrocephalus) is the largest of the toothed whales with males growing up to 20 metres in length. The mass of sperm whales ranges between 35000-57000 kg. Females only weight about 1/3 of the males.
Sol. The sperm whale (Physeter macrocephalus) is the largest of the toothed whales with males growing up to 20 metres in length. The mass of sperm whales ranges between 35000-57000 kg. Females only weight about 1/3 of the males.
Q13. Which among the following one lays eggs and does not produce young ones directly?
निम्नलिखित में से कौन अंडे देता है और सीधे बच्चो को जन्म नहीं देता है?
(a) Echidna / इकिडना
(b) Kangaroo / कंगारू
(c) Porcupine / साही
(d) Whale / व्हेल
निम्नलिखित में से कौन अंडे देता है और सीधे बच्चो को जन्म नहीं देता है?
(a) Echidna / इकिडना
(b) Kangaroo / कंगारू
(c) Porcupine / साही
(d) Whale / व्हेल
Show Answer
Ans.(a)
Sol. Echidnas sometimes known as spiny anteaters belong to the family Tachyglossidae in the monotreme order of egg-lying mammals. The four extinct species, together with the Playtypus are the only surviving members of that order and are the only extinct mammals that lay eggs. Their diet consists of ants and termites but they are not closely related with the true anteaters of America. They live in Australia and New Guinea.
Sol. Echidnas sometimes known as spiny anteaters belong to the family Tachyglossidae in the monotreme order of egg-lying mammals. The four extinct species, together with the Playtypus are the only surviving members of that order and are the only extinct mammals that lay eggs. Their diet consists of ants and termites but they are not closely related with the true anteaters of America. They live in Australia and New Guinea.
Q14. Mammal capable in flying is-
उड़ान में सक्षम स्तनपाइ है-
(a) Jaguar / जैगुआर
(b) Ostrich / शुतुरमुर्ग
(c) Pellican / पेलिकन
(d) Bat / चमगादड़
उड़ान में सक्षम स्तनपाइ है-
(a) Jaguar / जैगुआर
(b) Ostrich / शुतुरमुर्ग
(c) Pellican / पेलिकन
(d) Bat / चमगादड़
Show Answer
Ans.(d)
Sol. Bats are the mammals of the order Chiroptera whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight.
Sol. Bats are the mammals of the order Chiroptera whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight.
Q15. Consider the following animals—
निम्नलिखित जानवरों पर विचार करें-
1. Sea cow / सी काऊ
2. Sea horse / सी हॉर्स
3. Sea lion / सी लायन
Which of the above is/are mammal/mammals ?
उपर्युक्त में से कौन सा स्तनपायी / स्तनधारी है?
(a) Only 1 / केवल 1
(b) 1 and 3 / 1 और 3
(c) 2 and 3 / 2 और 3
(d) All of these / यह सभी
निम्नलिखित जानवरों पर विचार करें-
1. Sea cow / सी काऊ
2. Sea horse / सी हॉर्स
3. Sea lion / सी लायन
Which of the above is/are mammal/mammals ?
उपर्युक्त में से कौन सा स्तनपायी / स्तनधारी है?
(a) Only 1 / केवल 1
(b) 1 and 3 / 1 और 3
(c) 2 and 3 / 2 और 3
(d) All of these / यह सभी
Show Answer
Ans.(c)
Sol. The law of reflection states that the incident ray, the reflected ray, and the normal at the point of incidence all lie in the same plane.
Sol. The law of reflection states that the incident ray, the reflected ray, and the normal at the point of incidence all lie in the same plane.
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