General Science-47

1. Optical fiber mainly used in communication is based on
a. less absorption coefficient
b. less scattering
c. total internal reflection
d. refraction

2. When a red glass is heated in dark room it will seem
a. Black
b. Green
c. Yellow
d. Red

3. The snake bite firstly affects which part of the body?
a. Nervous system
b. Brain
c. Blood circulation
d. Lungs

4. Human skin is :
a. A Cell
b. A tissue
c. An organ
d. All  of these

5. Which one of the following causes green house effect?
a. Cosmic rays
b. Ultra-violet rays
c. Infrared rays
d. Radio waves

6. Insects are able to run on the surface of water because
a. Insects have less weight
b. Insects can swim on water
c. of the Archimede's upthrust
d. surface tension makes the surface behave as an elastic membrane

7. Cryogenic engines find application in
a. washing machine
b. frost free refrigerator
c. rocket technology
d. sub-marine propulsion

8. Insulin is secreted by:
a. Spleen
b. Gonads
c. Liver
d. Pancreas

9. Why is it easier to swim in sea water?
a. atmospheric pressure is highest at the sea
b. Sea water contains salt
c. Density of sea water is higher than the ordinary water
d. None of the above

10. A color-blind person cannot differentiate between:
a. Yellow and green
b. Black and blue
c. Red and green
d. Blue and green