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Q:

Who invented Electric Generator?

A) Michael Faraday	B) Thomas Alva Edison
C) Graham Bell	D) Alfred Nobel

Answer & Explanation Answer: A) Michael Faraday

Explanation:

Michael Faraday invented Electric Generator in 1831.

The operating principle of electromagnetic generators was discovered in the years of 1831–1832 by Michael Faraday.

The principle later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

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Filed Under: Inventions
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Q:

The concentration of glucose in three different mixtures (glucose and alcohol) is $\frac{1}{2}, \frac{3}{5} a n d \frac{4}{5}$ respectively. If 2 litres, 3 litres and 1 litre are taken from these three different vessels and mixed. What is the ratio of glucose and alcohol in the new mixture?

A) 3:2	B) 4:3
C) 2:3	D) 3:4

Answer & Explanation Answer: A) 3:2

Explanation:

Concentration of glucose are in the ratio = $\frac{1}{2} : \frac{3}{5} : \frac{4}{5}$

Quantity of glucose taken from A = 1 liter out of 2

Quantity of glucose taken from B = 3/5 x 3 = 1.5 lit

Quantity of glucose taken from C = 0.8 lit

So, total quantity of glucose taken from A,B and C = 3.6 lit

So, quantity of alcohol = (2 + 3 + 1) - 3.6 = 2.4 lit

Ratio of glucose to alcohol = 3.6/2.4 = 3:2

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Filed Under: Alligation or Mixture
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Q:

Sweety is 54 years old and her mother is 80. How many years ago was Sweety's mother three times her age?

A) 20	B) 41
C) 26	D) 33

Answer & Explanation Answer: B) 41

Explanation:

Given P = 54 and M = 80

According to the question,

Let ‘A’ years ago, M = 3P

=> M - A/P - A = 3

=> 80 - A = 3(54 - A)

=> 80 - A = 162 - 3A

=> 2A = 82

=> A = 41

Therefore, A = 41 years ago Sweety’s mother was 3 times of Sweety’s age.

Hence, at the age S = 13 and M = 39.

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Filed Under: Problems on Ages
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Q:

Who has become the first batsman to score three double tons in One Day Internationals?

A) Virat Kohli	B) AB de Villiers
C) Chris Gayle	D) Rohith Sharma

Answer & Explanation Answer: D) Rohith Sharma

Explanation:

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Filed Under: Sports
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Q:

How long are professional Golf Tour Players allotted per shot?

A) 22 seconds	B) 36 seconds
C) 41 seconds	D) 45 seconds

Answer & Explanation Answer: D) 45 seconds

Explanation:

Professional Golf Tour Players were allotted 45 seconds per shot.

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Filed Under: Sports
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Q:

How many feet are in a meter?

A) 3.214	B) 3.28084
C) 3.2516	D) 3.21456

Answer & Explanation Answer: B) 3.28084

Explanation:

We know that,

1 meter = 100 cms.

=> 1 meter = 3.28084 feet.

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Filed Under: Arithmetical Reasoning
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Q:

Who wrote the Book "A Tale of Two Cities"

A) William Shakespeare	B) Jane Austen
C) Leo Tolstoy	D) Charles Dickens

Answer & Explanation Answer: D) Charles Dickens

Explanation:

A Tale of Two Cities, which is one of two historical novels written by Charles Dickens, is set in London and in Paris and the French countryside at the time of the French Revolution.

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Filed Under: Books and Authors
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Q:

Two pipes A and B can fill a tank in 16 hrs and 12 hrs respectively. The capacity of the tank is 240 liters. Both the pipes are opened simultaneously and closed after 2 hrs. How much more water need to fill the tank?

A) 70 lit	B) 170 lit
C) 90 lit	D) 190 lit

Answer & Explanation Answer: B) 170 lit

Explanation:

Given A alone can fill the tank of capacity 240 lit in 16 hrs.

=> A can fill in 1 hr = 240/16 = 15 lit

=> B alone can fill the tank of capacity 240 lit in 12 hrs.

=> B can fill in 1 hr = 240/12 = 20 lit

Now, (A + B) in 1 hr = 15 + 20 = 35 lit

But they are opened for 2 hrs

=> 2 x 35 = 70 lit rae filled

Remaining water to be filled in tank of 240 lit = 240 - 70 = 170 lit.

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Filed Under: Pipes and Cistern
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