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Science And Technology Test 28
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Science And Technology Test 28

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  • Question 1/30
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    lips

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    Sound is produced in a trumpet by the vibration of the....
    Solutions
    lips
  • Question 2/30
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    1, 2 and 3 only

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    Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: 1. The orbit is geosynchronous. 2. The orbit is circular. 3. The orbit lies in the plane of the Earth’s equator. 4. The orbit is at an altitude of 22,236 km. Select the correct answer using the codes given below:
    Solutions
    1, 2 and 3 only
  • Question 3/30
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    Stratosphere

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    The layer of the atmosphere which provides ideal flying conditions for large jet aeroplanes is  ?
    Solutions
    Stratosphere
  • Question 4/30
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    Hour

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    Thermometer is related to degree in the same way as clock is related to?
    Solutions
    Hour
  • Question 5/30
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    an amplifier

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    The diode cannot be used as......
    Solutions
    an amplifier
  • Question 6/30
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    wavelenght and speed

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    When light passes from air into glass it experinces change in...
    Solutions
    wavelenght and speed
  • Question 7/30
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    decrease the rate of setting of cement

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    Gypsum is added to cement clinker to......
    Solutions
    decrease the rate of setting of cement
  • Question 8/30
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    Diamond

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    Which of the following is used as a material for making protective windows in space probes ?
    Solutions
    Diamond
  • Question 9/30
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    Slow down the speed of neutrons

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    The function of heavy water in a nuclear reactor is to?
    Solutions
    Slow down the speed of neutrons
  • Question 10/30
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    The mangrove trees do not get uprooted by storms and tides because of their extensive roots

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    The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
    Solutions
    The mangrove trees do not get uprooted by storms and tides because of their extensive roots
  • Question 11/30
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    Fungus

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    Penicillin, an, antibiotic, is obtained from a?
    Solutions
    Fungus
  • Question 12/30
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    It supports combustion

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    Which of the following characters is not shown by hydrogen?
    Solutions
    It supports combustion
  • Question 13/30
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    less than 5 cm

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    The wavelength used in radar is?
    Solutions
    less than 5 cm
  • Question 14/30
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    at a slightly higher temperature than fresh water

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    Sea water (i.e. saltwater) freezes at?
    Solutions
    at a slightly higher temperature than fresh water
  • Question 15/30
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    Earth, Mercury, Saturn, Jupiter

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    Which of the following order is given to the plantes of solar system on the basis of their sizes?
    Solutions
    Earth, Mercury, Saturn, Jupiter
  • Question 16/30
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    Hydrogenation

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    Cooking oil can be converted into vegetable ghee by the process of____
    Solutions
    Hydrogenation
  • Question 17/30
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    silicon

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    'IC chips' for computers are usually made of?
    Solutions
    silicon
  • Question 18/30
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    Japan

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    Solar-B satellite to study the sun has been launched by?
    Solutions
    Japan
  • Question 19/30
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    Nuclear Power generation plants

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    Heavy Water is normally used by which of the following industries?
    Solutions
    Nuclear Power generation plants
  • Question 20/30
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    distilled water

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    The best conductor of electricity is.....
    Solutions
    distilled water
  • Question 21/30
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    1 angstrom

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    The wavelength of X-rays is of the order of?
    Solutions
    1 angstrom
  • Question 22/30
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    monocarboxylic acids

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    Soap is a mixture of sodium or potassium salts of?
    Solutions
    monocarboxylic acids
  • Question 23/30
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    ecliptic

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    The apparent path of the sun round the sky is called.......
    Solutions
    ecliptic
  • Question 24/30
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    James Simpson

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    Who invented chloroform as anaesthetic?
    Solutions
    James Simpson
  • Question 25/30
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    Red Phosphorus

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    Which form of phosphorus is used in safety metals?
    Solutions
    Red Phosphorus
  • Question 26/30
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    Throat

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    The disease diphtheria affects..
    Solutions
    Throat
  • Question 27/30
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    black

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    Which of the following is not a primary colour ?
    Solutions
    black
  • Question 28/30
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    petrol additive

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    Tetraethyl lead is used as?
    Solutions
    petrol additive
  • Question 29/30
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    Cosmic rays

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    Mesons are found in?
    Solutions
    Cosmic rays
  • Question 30/30
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    Helium

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    Which of the following was to be discovered first in the chromospheres of the sun?
    Solutions
    Helium
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