CAT Questions

Q:

Why is burning coal a major source of pollution?

Answer

Coal is chemically complex fuel. Whenever it is burned, gases are given off and particles of ash, called "fly ash," are released. Release of sulfur from burning into the air. The sulfur in coal combines with oxygen to form sulfur dioxide, which can be a major source of air pollution if emitted in large enough quantities. This stuff comes back as acid rain when it attaches itself to a raindrop. 


 


Today, many of the effects of coal burning have been reduced significantly or eliminated. This is super-nasty and is only stopped by buying low-sulfur coal from Montana or Wyoming. The eastern power plants have to pay to move the coal from out west and this increases the price of power production.

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Subject: General Science Exam Prep: AIEEE , Bank Exams , CAT
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Q:

Which area best lends itself to the formation of fossils?

which_area_best_lends_itself_to_the_formation_of_fossils1538734185.jpg image

A) near active volcano B) lake beds
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Area near active volcano or lake beds are best areas that lends itself to the formation of fossils.

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Filed Under: General Science
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Q:

What sugar is found in DNA?

A) Ribose B) Deoxyribose
C) Pentose D) Sucrose
 
Answer & Explanation Answer: B) Deoxyribose

Explanation:

DNA - Deoxyribonucleic acid is a type of nucleic acid. The sugar contained in it is called Deoxyribose.

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

The rate at which energy is transferred is called

A) Power B) Watt
C) Volt D) Potential
 
Answer & Explanation Answer: A) Power

Explanation:

Energy can be transferred from one system to the other. The rate at which energy is transferred from one system to other system is called POWER. Energy transferred in one second is called a watt.

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Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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2 2922
Q:

The oval window is connected directly to which passageway?

A) scala tympani B) external auditory meatus
C) scala vestibuli D) pharyngotympanic tube
 
Answer & Explanation Answer: C) scala vestibuli

Explanation:

The oval window is connected directly to scala vestibuli.

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Filed Under: Biology
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Q:

In human relations, the irritation threshold is the

A) length of time an annoying behavior continues B) action that causes an annoyance
C) frequency of the annoying behavior D) point at which a person notices something and becomes annoyed
 
Answer & Explanation Answer: D) point at which a person notices something and becomes annoyed

Explanation:
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Filed Under: Physics
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Q:

The More You Have, The Less You See. What is it?

A) Light B) Darkness
C) Sight D) None
 
Answer & Explanation Answer: B) Darkness

Explanation:

The More You Have the Darkness, The Less You See i.e, visible less.

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Q:

5 Digits Number?

What 5-digit number has the following features:

If we put the numeral 1 at the beginning, we get a number three times smaller than if we put the numeral 1 at the end of the number.

Answer

We can make an equation:


3(100000 + x) = 10x+1


(Why? Well, adding 100000 puts a 1 at the front of a five-digit number, and multiplying by 10 and adding 1 puts a 1 at the end of a number)


Solving this gives:


10x+1 = 3(100000 + x)
10x+1 = 300000 + 3x
10x = 299999 + 3x
7x = 299999
x = 299999/7 = 42857


The answer is 42857 (142857 is three times smaller than 428571).

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