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Q:

Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? 

A) K1k2/k1+k2 B) 2k1k2/k1+k2
C) K1+k2/k1k2 D) None
 
Answer & Explanation Answer: B) 2k1k2/k1+k2

Explanation:

We know that,

 

The equivalent K =  L1 + L2L1K1+L2K2

 

where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.

 

But here L1 = L2 = L (say)

 

Then K = L+L/(L/K1 + L/K2)  =  2K1K2K1+K2

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Filed Under: Physics
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Q:

Which of the following was not a purpose for building Farakka Barrage?

 

A) Checking water flowing into Bangladesh B) Checking silting of Kolkata Port
C) Preventing erosion of Kolkata Port D) Facilitating navigation in Ganga river
 
Answer & Explanation Answer: D) Facilitating navigation in Ganga river

Explanation:
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Q:

The name of the first bank established in India was

 

A) Bank of Hindustan B) Reserve Bank of Indian
C) Imperial Bank D) State Bank of India
 
Answer & Explanation Answer: C) Imperial Bank

Explanation:
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Filed Under: Inventions
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Q:

Germany signed the Armistice Treaty on ____ and World War I ended

A) January 19, 1918 B) May 30, 1918
C) November 11, 1918 D) February 15, 1918
 
Answer & Explanation Answer: C) November 11, 1918

Explanation:
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20 7063
Q:

Central processing unit is combination of

A) Arithmetic and Control unit B) Control and Output unit
C) Control and Storage unit D) Arithmetic logic and input unit
 
Answer & Explanation Answer: A) Arithmetic and Control unit

Explanation:
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9 7061
Q:

Gold and silver are extracted from their respective ores by _______

A) Smelting B) Roasting
C) Leaching D) Hydro metallurgy
 
Answer & Explanation Answer: D) Hydro metallurgy

Explanation:
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Filed Under: Chemistry

24 7060
Q:

Choose the word that best defines the given phrases:-

To throw up the sponge

A) To surrender or give up a contest B) To offer a challenge
C) To become utterly disappointed D) To maintain grit and enthusiasm until the end
 
Answer & Explanation Answer: A) To surrender or give up a contest

Explanation:

To throw up the sponge means to give up a contest or to acknowledge defeat or surrender

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Filed Under: English
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Q:

_________ has successfully created the country’s first smart grid project, which will generate power from renewable sources of energy.

A) Indian Institutes of Technology B) Indian Institutes of Engineering Science Technology
C) Indian Institutes of Space Science and Technology D) Indian Institutes of Management
 
Answer & Explanation Answer: B) Indian Institutes of Engineering Science Technology

Explanation:

The Indian Institute of Engineering Science and Technology (IIEST) has successfully created the country’s first smart grid project, which will generate power from renewable sources of energy.  The project will soon be inaugurated by President Pranab Mukherjee, IIEST Director Prof Ajoy Kumar Roy. The smart grid will be synchronised to generate power from solar, wind and vegetable waste resources, depending on the weather conditions and availability of waste products. It is the first of its kind in the country.

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