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21.   CNG stands for?

A.     Converted Natural Gas

B.    Conduced Natural Gas

C.    Conducted Natural Gas

D.    Compressed Natural Gas

22.   Which from the following is true for "Sound"?

A.     Sound cannot travel through a vaccum

B.    Sound cannot travel through gases

C.    Sound cannot travel through liquids

D.    Sound cannot travel through solids

23.   When white light is passed through a prism, it splits into __________ colours.

A.     5

B.    6

C.    7

D.    8

24.   1 nanometer = ?

A.     10^-3 meter

B.    10^-6 meter

C.    10^-9 meter

D.    10^-12 meter

25.   Instrument used for measuring very high temperature is __________.

A.     Pyroscope

B.    Pyrometer

C.    Seismograph

D.    Xylometer

26.   Sound waves are _________ waves.

A.     Transverse

B.    Electromagnetic

C.    Longitudinal

D.    none of these

27.   The lifespan of White Blood Cells is __________ day(s).

A.     1

B.    2

C.    3

D.    4

28.   The fluid part of blood is known as __________.

A.     plasma

B.    platelets

C.    blood cells

D.     

29.   X-rays were discovered by __________.

A.     Rontgen

B.    Thomson

C.    Rutherford

D.    Bacquerel

30.   The speed of light is __________.

A.     280,000 km/s

B.    300,000 km/s

C.    320,000 km/s

D.    none of these

ANSWERS:

21.   D

22.   A

23.   B

24.   C

25.   B

26.   C

27.   A

28.   A

29.   A

30.   B