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Q:

In what time would a cistern be filled by three pipes which diameters are 2 cm, 3 cm and 4 cm running together, when the largest alone can fill it is 58 minutes? The amount of water flowing in each pipe is proportional to the square of its diameter.

A) 26 min B) 32 min
C) 36 min D) 42 min
 
Answer & Explanation Answer: B) 32 min

Explanation:

Given that the diameters of the three pipes are 2 cm, 3 cm and 4 cm

From the given data,

Amount of water from three pipes is 4 units, 9 units and 16 units.

Let the capacity of cistern be 'p' units.

∴ p/58 = 16

⇒ p = 928 units.

 

In 1 minute, quantity to be filled by 3 pipes = 29 units

∴ Total time required = 928/29 = 32 minutes.

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Filed Under: Pipes and Cistern
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Q:

Nationalistic composers expressed their nationalism by

A) songs on dances B) songs on people
C) songs on peasant life D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Nationalistic composers expressed their nationalism by basing songs on dances or people, folklore, peasant life, operas, symphonic poems.

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Filed Under: Indian History
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Q:

Depth of ocean is measured by

A) Animometer B) Aerometer
C) Siesmometer D) Fathometer
 
Answer & Explanation Answer: D) Fathometer

Explanation:

Fathometer is used to measure the depth of the ocean.

depth_of_ocean_is_measured_by1542975982.jpg image

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Filed Under: Physics
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Q:

Glaucoma is usually caused by

A) High pressure on the optic nerve B) Loss of hearing
C) Loss of Bone density D) None of the above
 
Answer & Explanation Answer: A) High pressure on the optic nerve

Explanation:

Glaucoma is usually caused by high pressure on the optic nerve which leads the loss of eye sight.

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Filed Under: Biology
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Q:

Mr. Rajan invested Rs 1,00,000 in US Stock Markets when the GBPINR rate was 75. After one year his investment appreciated by 20% in GBP terms. He sold of his investments and repatriated the money to India at the then existing rate of 80. what was real returns in INR?

A) loss of 24% B) gain of 28%
C) loss of 28% D) gain of 20%
 
Answer & Explanation Answer: B) gain of 28%

Explanation:

Money invested by Rajan before 1 year was = Rs. 100000

Money in UK pounds @ 75 is = 100000/75 = 1333.33 Pounds

 

Now, after 1 year invested amount was appreciated by 20%

=> 20% of 1333.33 = 266.66

 

Total investment becomes = 1333.33 + 266.66 = 1600 Pounds

This 1600 Pounds @ Indian currency at 80 = 1600 x 80 = Rs. 1,28,000

 

Hence, Rajan's investment of Rs. 1,00,000 becomes Rs. 1,28,000 in 1 year

 

Therefore, his profit % = [(128000 - 100000)/100000] x 100 = 28%.

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Filed Under: Profit and Loss
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Q:

The balance of an account is determined by

A) Sum of credits and debits B) Difference of credits and debits
C) Product of credits and debits D) None of the above
 
Answer & Explanation Answer: B) Difference of credits and debits

Explanation:

The balance of an account is determined by the difference of credits amount and debits amount in the sheet.

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Filed Under: Bank Interview
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Q:

An enzyme speeds up a reaction by

A) raising the activation energy B) absorbing energy
C) lowering the activation energy D) None of the above
 
Answer & Explanation Answer: C) lowering the activation energy

Explanation:

An enzyme speeds up a reaction by lowering the activation energy which is done by catalysts to increase the rate.

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Filed Under: General Science
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Q:

Life originated by chemosynthesis was proved in the laboratory by

A) Miller B) Pasteur
C) Aristotle D) Sanger
 
Answer & Explanation Answer: A) Miller

Explanation:

Life originated by chemosynthesis was proved in the laboratory by Miller.

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Filed Under: General Science
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