GATE Questions

Q:

Depletion of ozone layer is caused by

A) CFC's B) Carbon tetra-chloride (CCl4)
C) HCFC's D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Ozone layer depletion is one of the most serious problems faced by our planet earth. Substances that Deplete the Ozone Layer (ODS) emission are responsible for ultraviolet radiations from the sun break them to release chlorine (from CFCs) and bromine (from methyl bromide and halons).

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Q:

The light of distant stars is affected by

A) Interstellar Dust B) The Earth's Atmosphere
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:
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Q:

Land of midnight sun is called

A) Japan B) Myanmar
C) Nepal D) Norway
 
Answer & Explanation Answer: D) Norway

Explanation:

Norway is called as the land of midnight sun.

land_of_midnight_sun_is_called1537271159.jpg image

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Q:

The process of bones increasing in width is known as

A) appositional growth B) concentric growth
C) closing of the epiphyseal plate D) long bones reaching adult length and width
 
Answer & Explanation Answer: A) appositional growth

Explanation:
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Q:

The ratio of volume of a cone to that of a cylinder if cylinder radius is reduced by 4 times and its height increased by 8 times of that of the cone, is - 

A) 3:2 B) 2:3
C) 5:7 D) 7:5
 
Answer & Explanation Answer: B) 2:3

Explanation:

Ans. Let radius of the base and height of the cone be ‘r’ & ‘h’ respectively.

Then volume of cone = πr2h/3 For cylinder, radius is reduced by 4 times = r/4 And,  height is increased by 8 folds = 8h Volume of cylinder = πR2H = π(r/4)2 (8h) = (16/8)πr2h = πr2h/2 Ratio of volume of cone to volume of cylinder = (πr2h/3) : (πr2h/2) Or, Ratio = 2 : 3.

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Q:

I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound.

 What am I?

Answer

A Windmill.

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Q:

Golden Revolution refers to

A) Millets B) Viticulture
C) Horticulture D) Oil seeds
 
Answer & Explanation Answer: C) Horticulture

Explanation:

Golden Revolution refers to Horticulture. Horticulture has been defined as the culture of plants for food, comfort and beauty.

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Q:

Which of the following defines a genome?

A) Every human cell B) the complete set of an organism's genes and other DNA sequences
C) the complete set of an organism's polypeptides D) a karyotype
 
Answer & Explanation Answer: B) the complete set of an organism's genes and other DNA sequences

Explanation:
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