Which one of the following is not a way to reduce friction...? Mcqs

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Which one of the following is not a way to reduce friction...?

(A) Smooth and polishing surfaces
(B) Less contact area

(C) Oil and lubricants
(D) Ball bearing and rollers

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In the structure of fiber, the light is guided through the core due to total internal:...?

(A) Reflection
(B) Refraction

(C) Diffraction
(D) None of these

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Ozone layer protects the Earth from __________ radiations from the Sun....?

(A) microwaves
(B) infrared

(C) X-rays
(D) ultraviolet

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The term acid comes from the Latin word ____...?

(A) Acere
(B) Acidos

(C) Acare
(D) Acre

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Organ of human body which is considered on the largest organ is ______...?

(A) Skin
(B) Digestive tract

(C) Liver
(D) Brain

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The damage to the_________nerve could result in the defect of the eye movement:...?

(A) Optic
(B) Trigeminal

(C) Abducens
(D) none

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The hormone that increases the rate of heart beat and blood pressure after shock in a person is___________...?

(A) Adrenalin
(B) Gastrin

(C) Thyroxin
(D) Pancreatic

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Mass of Earth is___________...?

(A) 5.972 × 1024 kg.
(B) 6.972 × 1024 kg

(C) 7.972 × 1024 kg
(D) 8.972 × 1024 kg

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Which is not a cause of land pollution...?

(A) Plastic bags, bottles, glass bottles, tin cans
(B) Vegetables and fruit cutting

(C) Animal wastes
(D) All of these are causes of land pollution

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An iceberg is floating in sea. How much of its mass will remain above the surface of water...?

(A) One tenth
(B) One fifth

(C) One fourth
(D) One third

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