Questions

Q:

Improve the bracketed part of the sentence.
The student of human history can draw on many more natural experiments (than) just comparisons among the five inhabited continents.

A) to B) of
C) for D) no improvement
 
Answer & Explanation Answer: D) no improvement

Explanation:
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Q:

Work done in a free expansion process is

A) Minimun B) 0
C) Maximum D) None of the above
 
Answer & Explanation Answer: B) 0

Explanation:

No work done as there is no external external pressure in free expansion. 

 

Hence, Work done in a free expansion process is Zero.

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Q:

Which of the following is a compound machine?

A) Screw B) Knife
C) Bicycle D) Ramp
 
Answer & Explanation Answer: C) Bicycle

Explanation:

Bicycle is a compound machine in the above given options. A compound machine is a machine that is formed by two or more simple machines.

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Q:

The speed of a boat when travelling downstream is 32 km/h, whereas when travelling upstream it is 28 km/h. What is the speed of the boat in still water?

A) 27 km/h B) 29 km/h
C) 31 km/h D) Cannot be determined
 
Answer & Explanation Answer:

Explanation:

Ans.  Suppose the speed of boat in still water is x km/h and speed of stream is y km/h

Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i) 

Speed of boat in upstream = (x – y) km/h

x – y = 28 …(ii)

Add. Eqs. (i) and (ii), we get 2x = 60

x = 30 km/h

 

 

 

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Q:

Which of the following is an example of plagiarism?

A) A student is expected to write a book report about a book that his teacher has assigned. The student doesn't want to read the book and is bored with the subject. He visits websites that provide reviews and book reports and he copies from each of the diffe B) A writer decides that he wants to create an Internet website to generate ad revenue. Instead of writing his own articles, he visits twenty other websites that have articles on the topic in which he is interested. He copies each of the articles, changes th
C) When a writer reuses a mix of word, phrases, and ideas from a source without indicating which words and ideas have been borrowed and/or without properly citing the source. D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Duplicating the content or Copying words or ideas from someone else WITHOUT giving credit is called Plagiarism.

Plagiarism can be a violation of copyright laws and can be considered cheating.

  

Types of Plagiarism :: 

 

1. Direct Plagiarism

 

2. Mosaic Plagiarism

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Q:

Standing on your toes as in ballet, is an example of

A) plantar extension B) plantar flexion
C) adduction D) dorsiflexion
 
Answer & Explanation Answer: B) plantar flexion

Explanation:
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Q:

Which of the following civilization is associated with 'Achaemenid Empire'?

A) Chinese Civilization B) Iranian Civilization
C) Egyptian Civilization D) Arab Civilization
 
Answer & Explanation Answer: B) Iranian Civilization

Explanation:

In the middle of the 6th centuryB.C, a powerful empire was established in Iran this empire which lasted over two centuries is known as the Achaemenid Empire. The founder of this Empire was Cyrus with his capital at pasargadae. In 539 B.C, cyrus defeated the Babylonians and extended his empire over a vast territory up to Asia Miner. His successor was Darius I (522-486 B.C).

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Q:

The cotton gin was an important invention because

Answer

Cotton Gin was invented by Eli Whitney in 1793, which is used to separate cotton seeds from cotton fiber.


 


Hence, it was an important invention because it dramatically reduced the amount of time it took to separate cotton seeds from cotton fiber.

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