1.
An
eye defect which usually results from an unequal curvature of the cornea is:
a.
Nearsightedness
b. Astigmatism
c.
colour
blindness
d.
night
blindness
2.
The
velocity of sound in air (under normal conditions) is:
a.
30
m / sec
b.
320
m / sec
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c. 332 m / sec
d.
3,320
m / sec
3.
A
photo-electric cell converts:
a.
sound energy into electrical energy
b. light energy into electrical energy
c.
an
electrical signal into sound waves
d.
electrical
energy into light energy
4.
Which
of the following sounds cannot be heard by human ear?
a.
300
vibrations / sec
b.
1,000
vibrations / sec
c.
10,000
vibrations / sec
d.
30,000 vibrations /
sec
5.
Exposure
to sunlight helps a person improve his health because:
a.
the
infra-red light kills bacteria in the body
b.
resistance
power increases
c.
the
pigment cells in the skin get stimulated and produce a healthy tan
d.
the ultraviolet rays
convert skin oil into Vitamin D
6. Small
amounts of iodine are necessary in our diet to:
a. prevent
pellagra
b.
compensate for under activity of the thyroid gland
c. stimulate
clotting of blood
d. stimulate
pituitary gland
7. On
a sudden cardiac arrest, which of the following is advised as a first step to
revive the functioning of human heart?
a.
Mouth to mouth resuscitation
b. Giving
external cardiac massage
c. Sprinkling
water on the face
d. Giving
cool water to drink
8. A
triode differs from a diode in the way that:
a.
it can amplify a
signal
b. it
has vacuum inside
c. it
has a heated cathode
d. its
current is caused by the photoelectric effect
9. Radioactive
substances can be produces readily in:
a. an
electron gun
b.
an atomic pile
c. a
transistor
d. a
Wilson cloud chamber
10. The
method of estimating the age of the crust of the earth, which is now believed
to be the most accurate, makes use of the rate of:
a. accumulation
of sedimentary beds
b. accumulation
of salt in the ocean
c.
atomic disintegration (radio-activity)
d. loss
of heat by the earth
11. When
a given amount of air is cooled:
a.
the amount of moisture it can hold decreases
b. its
absolute humidity decreases
c. its
relative humidity remains constant
d. ts
absolute humidity increases
12. With
the present-day advancement in medical techniques, transplants are possible in
all of the following except:
a. Artery
b.
Bone
c. Cornea
d. Kidney
13. The
reaction which converts sugar solution into alcohol is a example of:
a. Saponification
b. Hydrogenation
c.
Fermentation
d. Hydrolysis
14. The
Rh factor refers to:
a.
a protein substance found in the blood of some people
b. a
hormone carried by the blood
c. the
ratio of red corpuscles to white corpuscles in the blood
d. a
process that speeds up the clotting of blood
15. The
greatest value of bees to mankind is in:
a. supplying
of food for birds
b.
insuring pollination of certain crop plants
c. storing
honey for man’s use
d. furnishing
beeswax needed in certain specialized industries
16. All
of the following are examples of chemical changes except the:
a.
magnetizing of iron
b. rusting
of iron
c. digestion
of food
d. souring
of milk
17. Cancer
is a disease which:
a.
cannot be spread by those who have it
b. is
found only in human beings
c. develops
only in certain organs of the body
d. is
passed from generation to generation
18. The
moon has no atmosphere because:
a. no
atmosphere has ever formed there
b. the
rocky surface completely absorbed the gases
c. due
to the low temperature, gases have condensed
d. its gravitational pull is not strong
enough to hold an atmosphere
19. When
a moving bus stops suddenly, the passengers are pushed forward because of the:
a. friction
between the earth and the bus
b. friction
between the passengers and the earth
c.
inertia of the passengers
d. inertia
of the bus
20. Which
of the following is not an attribute of bacterium?
a.
Ability to arise from non-living matter
b. Growth
c. Reproduction
d. Respiration
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