Q:

Malthusian theory is associated with which of the following ?

A) Poverty	B) Employment
C) Diseases	D) Population

Answer & Explanation Answer: D) Population

Explanation:

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Q:

Where is the commercial capital of Sri Lanka?

A) Trincomalee	B) Colombo
C) Galle	D) Kandy

Answer & Explanation Answer: B) Colombo

Explanation:

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Q:

Sextant is an instrument used in which of the following ?

A) Gynaecology	B) Navigation
C) Birth control	D) Medical treatment

Answer & Explanation Answer: B) Navigation

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Q:

A Sonar of a ship sends sounds waves of speed 1500 m/s. These waves are reflected back by the ocean floor in 5 seconds. Find the depth (in m) of the ocean floor.

A) 3750	B) 7500
C) 1875	D) 5000

Answer & Explanation Answer: A) 3750

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Q:

HEPA filters are used to remove microbes from

A) human tissues	B) air
C) medical instruments	D) liquids

Answer & Explanation Answer: B) air

Explanation:

High-efficiency particulate air (HEPA), also known as high-efficiency particulate absorbing and high-efficiency particulate arrestance, is an efficiency standard of air filter.

hepa-filters1596516018.png image

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Q:

What will be the force of attraction between two bodies weighing 20 kg and 50 kg, respectively, with a distance of 2 metre between them?

A) 16.675 x 10-11 N	B) 166.75 x 10-10 N
C) 6.67 x 10-11 N	D) 16.67 x 5-10 N

Answer & Explanation Answer: B) 166.75 x 10-10 N

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Q:

The space shuttle which took Sunita Williams beyond earth was

A) Challenger	B) Galileo
C) Discovery	D) Voyager-2

Answer & Explanation Answer: C) Discovery

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Q:

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

To hit the nail on the head

A) To take out frustration by beating a person	B) To make a wrong decision
C) To find exactly the right answer	D) To unwittingly fall into a trap

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