1. Which of the following explain the reasons why there is no total eclipse of the sun?
(a) Area of the sun covered by the moon (Correct)
(b) Direction rotation around the sun
(c) Orbit of moon around the sun
(d) Size of earth in relation to that of moon
2. The instrument used to measure the specific gravity of milk is?
(a) Barometer
(b) Hygrometer
(c) Lactometer (Correct)
(d) None of these
3. The internal antenna of transistor set is made of?
(a) Iron
(b) Ferror Chrome (Correct)
(c) Copper
(d) Alnico
4. Gerontology is the study of?
(a) Process of ageing (Correct)
(b) Growth of cells
(c) Birds
(d) Vegetables
5. Helium is used for respiration in deep water instead of nitrogen because
(a) It is heavier than nitrogen (Correct)
(b) It is higher than nitrogen
(c) It mixes less in blood than nitrogen
(d) It helps oxygen to burn more quickly
6. In a fluorescent tube which of the following components are found?
(a) Mercury vapour (Correct)
(b) Argon and carbon dioxide
(c) Helium and oxygen
(d) Argon and neon
7. The common ore of aluminium is?
(a) Chromite` (Correct)
(b) Cryolite
(c) Bauxite
(d) Monazite
8. When one enters a dark room, he is not able to see anything but, after sometime vision
improves. This is because?
(a) The retina of the eye comes forward
(b) The retina of the eye moves backward
(c) The pupil of the eye contracts
(d) The pupil of the eye dilates (Correct)
9. Radio carbon dating is used to find the age of?
(a) Fossils (Correct)
(b) Building
(c) Rocks
(d) Babies
10. What is periscope used for?
(a) To survey the ships on the surface of the sea when the submarine is under water (Correct) (Correct)
(b) To extinguish fire
(c) To measure purity of milk
(d) None of the above
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