Discovery & Inventions GK Quiz-8

Discovery & Inventions GK Quiz-8

Discovery & Inventions Multiple Choice Questions (MCQs) Quiz for State and UPSC Civil Services Examinations. Objective Questions on Discovery & Inventions for competitive examinations.

    126. The study of mountains is known as

    (1) Oncology 
    (2) Lithology
    (3) Orology 
    (4) Ornithology
    Answer:
    126. (3) Orology is the branch of physical geography dealing with mountains. It is a field of research that regionally concentrates on the Earth's surface's part covered by mountain landscapes.

    127. Which of the following pairing is incorrect?

    (1) Hygrometer Water vapour content of the atmosphere
    (2) Lactometer Specific gravity of liquids
    (3) Anemometer Speed of the wind
    (4) Seismograph Earthquakes
    Answer:
    127. (2) Lactometer is a device used to measure the specific gravity, and therefore the richness, of milk. It is based on law of floatation which states that when a solid is immersed in a liquid, it is subject to upward thrust equal to the weight of the liquid displaced by the body and acting in upward direction. It is useful for testing the purity of milk.

    128. Which of the following is Study of fossils ?

    (1) Ethology
    (2) Etiology
    (3) Anthropology
    (4) Palaeontology
    Answer:
    128. (4) Palaeontology is the study of fossils to determine the structure and evolution of extinct animals and plants and the age and conditions of deposition of the rock strata in which they are found. Body fossils and trace fossils are the principal types of evidence about ancient life.

    129. The movement inside the Earth’s crust is studied by which of the following ?

    (1) Geology
    (2) Seismology
    (3) Plate tectonics
    (4) Pantograph
    Answer:
    129. (2) Scientists are able to understand Earth’s interior with the help of seismology. Seismology involves the study of seismic waves that travel through Earth. Seismic waves are sent through the earth during earthquakes. In contrast, Plate Tectonics is the study of the movement of the Earth’s crust due mainly to forces in the crust and upper mantle of the Earth’s interior.

    130. The study of relation of animals and plants to their surroundings is called ________

    (1) Ecology 
    (2) Ethrology
    (3) Genealogy 
    (4) Iconology
    Answer:
    130. (1) Ecology is defined as the study of the patterns and processes governing the abundance and distribution of organisms and their relationships to their environment. It is the science that deals with the inter-relationship between the various organisms living in an area and their relationship with physical environment.

    131. Sphygmomanometer measures the blood pressure in the

    (1) Veins 
    (2) Arteries
    (3) Eyes 
    (4) Synovial
    Answer:
    131. (2) Systemic arterial blood pressure usually is measured using an instrument called a sphygmomanometer. This device consists of an inflatable rubber cuff connected by tubing to a compressible bulb and a glass tube containing a column of mercury. The bulb is used to pump air into the cuff, and a rise in the mercury column indicates the pressure produced.

    132. Who invented Helicopter?

    (1) Copernicus 
    (2) Sikorsky
    (3) Cockrell 
    (4) Drinker
    Answer:
    132. (2) Attempts to create helicopters can be traced back to Leonardo da Vinci, but the first working prototype helicopter, the VS-300, was invented by Igor Sikorsky in 1939. The next model he designed was the R- 4 in 1942, which was the world’s first mass produced helicopter.


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