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Everyday science mcqs | GK MCQ Preparation Material
1- A moderator is used in nuclear reactor in order to ?
Accelerate the neutrons
Slow down the speed of the neutrons
Increase the number of elections
Decrease the number of electrons
2- Which of the following atmospheric layers help in radio communication?
Ionosphere
Stratosphere
Ozone layer
Troposphere
3- Monsoon is caused by____________________?
Rise in temperature
Movement of clouds
Rain forests
Seasonal reversal of winds
4- Fuel used in a Fast Breeder Reactor is _____________?
Uranium Oxide
Uranium thorium Oxide
Uranium Plutonium Oxide
Uranium Plutonium carbide
5- Kilowatt-hour is a unit of____________?
Electric Current
Energy
Time
Power
6- The term ‘Blue Shift’ is used to indicate?
In future sun would become blue
Turning a star from white to blue
Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.
Black hole was blue at its start
7- The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
14 days
28 days
8 days
18 days
8- The number of spark plugs needed in a diesel engine is__________?
0
5
2
1
9- Where do most of Asteroids lie?
In asteroid belt between the orbits of Jupiter and Venus
In asteroid belt between the orbits of Mars and Jupiter
In asteroid belt between the orbits of Mars and Venus
Everywhere in the sky
10- Television signals are converted into light signals by___________?
Photo diode
Optical Fiber
Transistor
Decoder
11- Which of the following explains the reason why there is no total eclipse of the sun?
Direction of rotation of earth around sun
Orbit of moon around earth
Area of the sun covered by the moon
Size of the earth in relation to that of moon
12- Which of the following layers make radio transmission possible?
Ionosphere
Mesosphere
Stratosphere
Troposphere
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5
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