A. Provide insulation for preserving body heat
B. Provide striking surface to the wings for flying
C. Make the body surface waterproof
D. impart coloration for species as well as sex recognition
Everyday Science Mcqs
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A. A device which when attached to an aircraft makes it invisible on the radar
B. A coating which reduces the visibility of an aircraft on radar
C. A Technology by which it is possible for the aircraft’s to spy in the enemy air-space
D. A technology by using which paratroopers can be dropped stealthily behind the enemy columns.
A. Ultraviolet Waves
B. Ultrasonic Waves
C. Electromagnetic Waves
D. Special Retina
A. Carbon dioxide
B. Carbon monoxide
C. Carbon tetrachloride
D. None of the above
A. the strength of T.V. waves is very limited
B. picture cannot be transmitted clearly after a specific distance
C. the shape of the earth is spherical
D. the air is not a good conductor of light and sound/waves
A. 60%
B. 65%
C. 72%
D. 80%
A. Mesosphere
B. Troposphere
C. Stratosphere
D. ionosphere
A. One tenth
B. One fifth
C. One fourth
D. One third
A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of diffraction leading to red end of the spectrum reaching the earth.
D. Of Scattering of light due to dust particles and air molecules.
A. The mass of the astronaut is reduced to zero
B. Gravity inside the spacecraft ceases to act
C. The astronaut is outside the influence of the earth’s gravitational force
D. The astronaut and the spacecraft are both in a free-failing state
