According to World Health Organization (WHO), the industrial limit of sound in the industries must be...? Mcqs

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According to World Health Organization (WHO), the industrial limit of sound in the industries must be...?

(A) 80 dB
(B) 75 dB

(C) 85 dB
(D) 100 dB

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A bacterium that lives in the intestines of human beings and animals is called...?

(A) Lactobacillus acidophilus
(B) Escherichia coli

(C) Staphylococcus aureus
(D) Bacillus subtilis

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What do we call when the sound of frequency will be below 20 Hz...?

(A) Audio sounds
(B) Infrasonic

(C) Ultrasonic
(D) Supersonics

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In a concave mirror, the image size depends upon _____...?

(A) Size of the object
(B) Area covered by the object

(C) Position of the object
(D) The shape of the object

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Balloons are filled with _________ ...?

(A) Nitrogen
(B) Helium

(C) Oxygen
(D) Argon

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Which Halogen exists in liquid state...?

(A) F2
(B) CI2

(C) Br2
(D) I2

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The scientist who first sent electromagnetic waves to distant places is...?

(A) James Clerk Maxwell
(B) Heinrich Hertz

(C) Thomas Alva Edison
(D) John Logie Baird

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One Gross is equal to___________...?

(A) 5 Dozen
(B) 10 Dozen

(C) 12 Dozen
(D) None of them

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In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________...?

(A) Electroplating
(B) Annealing

(C) Galvanization
(D) Vulcanization

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The common refrigerant used in domestic Refrigerator is_____________...?

(A) Neon
(B) Spirit

(C) Freon/Ammonia
(D) Methane

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