CSS Past Papers Everyday Science 2010 Test - 3

CSS Past Papers
Everyday Science 2010
Test - 3

1. Twinkling of stars is caused by?

a) None of these
b) Reflection of light
c) refraction of light
d) Interference of light
e) Polarization of light

2. Magnifying power of a simple microscope can be increased by?

a) increasing focal length of the lens
b) Lens of large aperture
c) lens of short aperture
d) None of these
e) Decreasing focal length of the lens

3. Bronze medal is made up of metal?

a) Copper , Tin
b) Copper , Zinc
c) Copper , Nickle
d) Sopper , Silver

4. One of the countries through which equator passes is?

a) Kenya
b) Malta
c) None of these
d) Pakistan
e) Malaysia

5. A very important practical application of properties of matter is hoeing or "godi" practiced by the farmers. This property of matter is called?

a) Stress
b) Capillarity
c) None of these
d) Strain
e) Elasticity

6. It is observed that the total pressure exerted by air on the man of average siz is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of?

a) of gravity
b) Earth pulls the man upward
c) None of these
d) An equal and opposite pressure acts from inside
e) of the height of a man

7. 27) A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect?

a) nuclear Radiation
b) Current
c) None of these
d) power
e) Voltage

8. A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?

a) None of these
b) 10 miles per sec
c) 25 miles per sec
d) b ) 60 miles per sec
e) 7 miles per sec

9. Night vision is possible with the help of?

a) Ultra violet Light
b) Infrared Rays
c) None of these
d) Violet light
e) Red light

10. Myopia is a defect of human eye. it can be corrected by using a lens called?
a) Convex lens
b) None of these
c) Cylindrical lens
d) Plano convex lens

e) Concave lens

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