Everyday Science MCQs

5120 MCQs  (Page 441 of 512)

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Optic fibres are used in :
A. Cat scans
B. X-ray photos
C. Ultrasound scans
D. Endoscopy
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The snow on the mountains does NOT melt all at once when it is heated by the sun because:
A. It becomes very hard
B. It reflects most of the heat from the sun
C. It has a low specific heat capacity
D. It has a high latent heat of fusion
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The source of the Sun’s energy is the process of ____________?
A. Photoelectric emission
B. Nuclear fission
C. Nuclear fusion
D. Thermionic emission
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The audio signals of TV are _____________?
A. Amplitude modulated
B. Frequency modulated
C. Fixe modulated
D. Velocity modulated
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The owl can see most clearly in total darkness because:
A. It has squint eyes
B. It has light bulbs in its eyes provided by nature
C. It produces infrasonic sounds
D. It has large eyes with orbs directed forward, giving it binocular sight
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A photostat machine works on _____________?
A. Electromagnetic image making
B. Magnetic image making
C. Thermal image making
D. Electrostatic image making
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To measure the speed of an approaching car a police officer shines?
A. Light waves on it
B. Microwaves on it
C. Radio waves on it
D. Ultra high frequency waves on it
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Rainbow is seen after rain because of hanging molecules of water which act as __________?
A. Lens
B. Prism
C. Mirror
D. Slabs
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Main use of salt in diet is to : ___________?
A. Ease the process of cooking
B. Increase the taste
C. Produce small amount of hydrochloric acid required for digestion
D. Inclease solubility of food particles in water
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Black foot disease is caused by the pollution of groundwater as a consequence of increased seepage of:__________?
A. Nitrates
B. Fluorides
C. Arsenic
D. Mercury
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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