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IAS Prelims Exam: NIOS DISASTERS AND THEIR MANAGEMENT Questions Set I

Feb 18, 2016 16:00 IST

    Environment and Ecology has become indispensable for IAS Prelims Exam. Candidates cannot dispense with this section. In future also Importance of Environment and Ecology cannot be underestimated. Following are some MCQs that would help candidates to understand the kinds of questions they are going to face from Environment and Ecology section in IAS Prelims Exam:

    Q.1. Which of the following diseases have mosquito as vector?

    1. Malaria

    2.  Filaria

    3. Encephalitis

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1,2 and 3

    Answer: d

    Explanation: Vector is a carrier of pathogen. Mosquito spend a part of their life cycle in water and is Vector for diseases such as malaria, yellow fever, encephalitis, filaria and dengue.

    Q.2. With reference to mode of spread of water borne disease, which of the following is/are true?

    1. Spread by drinking water contaminated by faeces

    2. Spread by poor quality water used for washing food

    3. Spread by water used for personal hygiene

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1, 2 and 3

    Answer: d

    Explanation: Water borne diseases are spread by drinking water contaminated by Faeces, by water used for personal hygiene, for washing food and other items.

    Q.3. Which of the following are water borne disease?

    1. Scabies

    2. Conjunctivitis

    3. Schistosomiasis

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1,2 and 3

    Answer: d

    Explanation: Diseases are spread by poor quality water used for washing and include skin diseases like scabies and eye disease such as trachoma and conjunctivitis. Water based diseases spread by parasites living in water include schistosomiasis transmitted by snails.

    Q.4. Which of the following is/are not bacterial disease?

    1. Typhoid

    2. Leptospirosis

    3. Cholera

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2
    4. None

    Answer: d

    Explanation: Typhoid caused by Salmonella typhi, Cholera caused by Vibrio cholera, Bacterial Diaorhoea, Leptospirosis caused by Leptospira are some of the bacterial diseases.

    Q.5. With reference to bacterial diseases, which of the following disease is spread by rodent?

    1. Typhiod
    2. Cholera
    3. Diahorrea
    4. Leptospirosis

    Answer: d

    Explanation: Leptospirosis caused by  Leptospira,  Rodents are primary hosts-carry organisms in kidneys, disease is spreaded by wading or swimming in water contaminated with rodent urine.

    Q.6. Which of the following is/are Helminth diseases?

    1. Filaria

    2. Bilharzia

    3. Guinea worm

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1,2 and 3

    Answer: c

    Explanation: Bilharzia is caused by Schistosoma spp. It is spread by Cercaria larvae of flukes in water penetrate skin of persons wading in water. Guinea worm caused by  Dracunculus medinensis is spread through  Unfiltered water. Filariasis  is vector borne disease related with water.

    Q.7. Consider the following statements

    1. Malaria is caused by plasmodium and spread by vector Aedes aegypti

    2. Dengue is caused by Barbo virus and spread by vector Anopheles.

    Select the correct answer from the following codes

    a. Only 1

    b. Only 2

    c. Both 1 and 2

    d. Neither 1 nor 2

    Answer: d

    Explanation:  Malaria is caused by plasmodium and spread by vector Anopheles Dengue is caused by Barbo virus and spread by vector Aedes aegypti.

    Q.8. Consider the following statements regarding symptoms of vector borne diseases

    1. Intense pain behind eyes
    2. Reduction in neutrophilic white blood cells
    3. Excruciating joint pain

    Which of the following disease have above mentioned symptoms?

    a. Malaria

    b. Chikungniya

    c. Dengue

    d. Filaria

    Answer: c

    Explanation:  symptoms of dengue are sudden onset of moderately high fever, excruciating joint pain, intense pain behind eyes, a second rise in temp following brief remission, reduction in neutrophilic white blood cells.

    Q.9. Consider the following statements

    1. Burning of fossil fuel, wood and crop residues all produce lot of Oxides of nitrogen
    2. Sulphur dioxide is major pollutant released from oil refineries.

    Select the correct answer from the following codes

    a. Only 1

    b. Only 2

    c. Both 1 and 2

    d. Neither 1 nor 2

    Answer: b

    Explanation:  Burning of fossil fuel, wood and crop residues all produce lot of carbon dioxide leading to global warming and climate change. Sulphur dioxide is produced by burning fossil fuels and it is a major pollutant released from oil refineries.

    Q.10. Which of the following is/are true about benign tumours?

    1.  They are not harmful

    2. Once removed they do not reappear.

    3. They can invade and damage nearby tissues and organs.

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1,2 and 3

    Answer: b

    Explanation: The benign tumours are not harmful. Generally they can be removed surgically and do not reappear. Further, cells from these tumours do not move to other parts of the body and rarely endanger life.

    Q.11. which of the following is/are true about malignant tumours?

    1. Cells of these tumours are abnormal

    2. Cells from these tumours enter the blood stream or lymphatic system

    3. Leads to formation of tumours in other organs.

    Select the correct answer from the following codes

    1. Only 1
    2. Only 1 and 2
    3. Only 2 and 3
    4. 1,2 and 3

    Answer: d

    Explanation: Malignant tumours are cancerous. Cells of these tumours are abnormal and they divide and re-divide without any control. They can invade and damage nearby tissues and organs. Cells from these tumours can break away and enter the blood stream or lymphatic system and spread from the original site to form new tumours in other organs.

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