Practice test

Wbcs preliminary (general science) sectional test – 12 - Test Set 1

Review 25 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

25 questions

Questions and explanations

  1. Question 1

    What is the SI unit of electrical resistance?
    1. Volt
    2. Ohm
    3. Ampere
    4. Watt
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  2. Question 2

    Which gas is popularly known as 'Laughing Gas'?
    1. Nitrogen dioxide
    2. Nitric oxide
    3. Nitrous oxide
    4. Nitrogen pentoxide
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  3. Question 3

    Which of the following is the main chemical component of pearls?
    1. Calcium carbonate
    2. Magnesium sulfate
    3. Calcium chloride
    4. Sodium bicarbonate
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  4. Question 4

    Which gas is essential for the process of combustion (burning)?
    1. Nitrogen
    2. Hydrogen
    3. Carbon dioxide
    4. Oxygen
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  5. Question 5

    What is the branch of biology that deals specifically with the study of insects?
    1. Ornithology
    2. Entomology
    3. Ichthyology
    4. Mycology
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  6. Question 6

    What is the approximate speed of light in a vacuum?
    1. $3 \times 10^8$ m/s
    2. $3 \times 10^5$ m/s
    3. $3 \times 10^{10}$ m/s
    4. $1.5 \times 10^8$ m/s
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  7. Question 7

    Who is widely regarded as the 'Father of Computers'?
    1. Alan Turing
    2. Bill Gates
    3. Charles Babbage
    4. Blaise Pascal
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  8. Question 8

    Which of the following metals is most commonly used for making the bodies of aircraft?
    1. Iron
    2. Silver
    3. Copper
    4. Aluminium
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  9. Question 9

    Which vitamin is naturally synthesized in the human skin upon exposure to sunlight?
    1. Vitamin A
    2. Vitamin D
    3. Vitamin B
    4. Vitamin K
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  10. Question 10

    Which acid is primarily responsible for the sour taste of curd (yogurt)?
    1. Citric acid
    2. Acetic acid
    3. Lactic acid
    4. Oxalic acid
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  11. Question 11

    Which of the following metals has the highest electrical conductivity at room temperature?
    1. Silver
    2. Copper
    3. Gold
    4. Aluminium
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  12. Question 12

    Which scientific instrument is used to measure the relative humidity of the air?
    1. Barometer
    2. Hygrometer
    3. Hydrometer
    4. Altmeter
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  13. Question 13

    What is the name of the biological process by which green plants manufacture their own food?
    1. Transpiration
    2. Respiration
    3. Fermentation
    4. Photosynthesis
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  14. Question 14

    Which is the smallest and lightest bone in the human body?
    1. Femur
    2. Tibia
    3. Stapes
    4. Fibula
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  15. Question 15

    What is the SI unit of thermodynamic temperature?
    1. Kelvin
    2. Celsius
    3. Fahrenheit
    4. Rankine
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  16. Question 16

    Which protein in human red blood cells is responsible for carrying oxygen?
    1. Insulin
    2. Hemoglobin
    3. Keratin
    4. Collagen
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  17. Question 17

    Which of the following is the primary source of energy for the Earth's ecosystem?
    1. Tides
    2. Wind
    3. The Sun
    4. Volcanic heat
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  18. Question 18

    At what temperature does water boil under standard atmospheric pressure?
    1. 0°C
    2. 32°C
    3. 212°C
    4. 100°C
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  19. Question 19

    Which gas is used for the artificial ripening of green fruits?
    1. Ethylene
    2. Methane
    3. Carbon dioxide
    4. Hydrogen
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  20. Question 20

    In the context of the Internet, what does 'WWW' stand for?
    1. World Wide Wrestling
    2. World Wide Web
    3. World Wide Wireless
    4. World Western Web
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  21. Question 21

    What is the scientific name for the study of birds?
    1. Entomology
    2. Ecology
    3. Ornithology
    4. Zoology
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  22. Question 22

    Which type of mirror is used by dentists to see enlarged images of a patient's teeth?
    1. Concave mirror
    2. Convex mirror
    3. Plane mirror
    4. Bifocal mirror
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  23. Question 23

    Which alloy is commonly used for making the heating elements in electric heaters?
    1. Brass
    2. Solder
    3. Steel
    4. Nichrome
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  24. Question 24

    Which gas is commonly used for the disinfection of water in swimming pools?
    1. Nitrogen
    2. Chlorine
    3. Oxygen
    4. Helium
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  25. Question 25

    In computer data storage, how many bits are contained in one 'Byte'?
    1. 4 bits
    2. 10 bits
    3. 8 bits
    4. 16 bits
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