The waves which are used for line of sight (LOS) communication are called:...? Mcqs

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The waves which are used for line of sight (LOS) communication are called:...?

(A) Space waves
(B) Cable waves

(C) Antenna waves
(D) None of these

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Which of the following helps in clotting of blood...?

(A) Vitamin B1
(B) Vitamin B2

(C) Vitamin D
(D) Vitamin K

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Soap is ______...?

(A) Acid
(B) Chemical

(C) Powder
(D) Salt

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Which metal pollute the air of a big city...?

(A) Copper
(B) Chromium

(C) Lead
(D) Cadmium

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The large dark patches on the Moon’s surface are known as___________...?

(A) Dark matter
(B) Maria, or seas, even though there is no water on the Moon

(C) Maria, or seas, because they are filled with water
(D) Moon spots

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Science which deals with the position and movement of heavenly bodies ...?

(A) Astrophysics
(B) Astronomy

(C) Astrology
(D) Astronautics

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If a machine performs 20 J of work in 10 sec. then it power is ______...?

(A) 200 watt
(B) 20 watt

(C) 2 watt
(D) 0.2 watt

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A common skin condition that causes skin redness and irritation is known as_________...?

(A) Psoriasis
(B) Hypermetropia

(C) Leukoderma
(D) Diphtheria

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Which of the following is closest to a yard in length...?

(A) 0.01m
(B) 0.1m

(C) 1m
(D) 10m

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What is caused by the revolution of the Earth around the Sun...?

(A) Day and Night
(B) Summer and Winter

(C) Tides
(D) Earthquakes

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