Practice Gk questions test 2 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Consider the following statements in respect of India advanced satellite INSAT–4A: - INSAT-4A was launched in December, 2005 from New Mexico.
- The European Commercial Launch Service Provider Arianespace was associated with the launch of INSA T-4A.
- Tata-Sky; a digital cable service provider; is associated with DTH television broadcasting service from INSA T 4A.
Which of the statements given above are correct?
(a)
(b)
(c)
(d)
Statement ‘2’ & ‘3’ is correct, but ‘1’ is incorrect. Because INSAT–4A was launched on 22 December 2005 from French Guiana.
Q-2) Which among the following statements are the requirements of good source of energy?- It should do a large amount of work per unit volume or mass.
- It should be easily accessible.
- It should be easy to store and transport.
- It should be economical.
(a)
(b)
(c)
(d)
Q-3) Consider the following statements: A person in a spaceship located half way between the earth and the sun will notice that the :
- sky is jet black.
- stars do not twinkle.
- temperature outside the spaceship is much higher than that on the surface of the earth.
Which of the statement(s) given above is/ are correct?
(a)
(b)
(c)
(d)
There is a presence of atmosphere at earth’s surface which consists of thick and moving layers of air. The dust particles, particulates, smog, water vapour and smoke are also present in air.
Stars twinkle when we see them from the Earth’s surface because we are viewing them through thick layers of turbulent (moving) air in the Earth’s atmosphere.
As their light travels through the many layers of the Earth’s atmosphere, the light of the star is bent (refracted) many times in random directions (light is bent when it hits a change in density –like a pocket of cold air or hot air). This random refraction results in the star as its twinkling but for a person in spaceship no such refractions are possible as there is vaccum in space.
Thus, star will not twinkle.
Similarly, sky will appear blue to us due to Rayleigh scattering which is again due to presence of atmosphere on earth’s surface. The shorter wavelength light is absorbed by the gas molecules of atmosphere. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Some of this scattered blue light reaches you.
Since, you see , the sky looks blue. Whereas no atmosphere is there in space thus, no absorbing and scattering is possible that’s why for a person in spaceship sky appears black.
Temperature outside the spaceship is higher in comparison to earth’s surface because of being nearer to sun.
Q-4) At the present level of technology available in India, solar energy can be conveniently used to :
- Supply hot water to residential buildings.
- Supply water for minor irrigation projects.
- Provide street lighting.
- Electrify a cluster of villages and small towns.
Which of the statements given above are correct?
(a)
(b)
(c)
(d)
Solar energy, radiant light and heat from the sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies.
At present solar energy in our country is used for solar water heater.
Solar lights that charge during the day and light up at night are a common sight along walkways.
Q-5) Which one among the following radiations carries maximum energy?
(a)
(b)
(c)
(d)
Q-6) Repeaters used in telephone links are:
(a)
(b)
(c)
(d)
Q-7) The phenomenon of high and low tides and the difference in sea levels give________.
(a)
(b)
(c)
(d)
Q-8) Propane is used instead of natural gas on many farms and in rural areas. Why is propane often used instead of natural gas?
(a)
(b)
(c)
(d)
Q-9) Select the correct statement(s) from the following.- In conductors, the valence and conduction bands may overlap.
- Substances with energy gap of the order of 10 eV are insulators.
- The resistivity of a semiconductor increases with increase in temperature.
- The conductivity of a semiconductor increases with increase in temperature.
(a)
(b)
(c)
(d)
Q-10) The main constituent of biogas is
(a)
(b)
(c)
(d)