General Knowledge Questions

Q:

Why does'nt the hydrogen atom emit X-rays?

A) It is very small in size B) It has only one electron
C) Its energy levels are very close to each other D) it is highly electropositive
 
Answer & Explanation Answer: C) Its energy levels are very close to each other

Explanation:

For an atom to emit X-rays it should have difference in energy levels

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Filed Under: Physics

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Q:

One of the following sites from where the famous Bullseal of Indus Valley Civilization was found

A) Harappa B) Chanhudaro
C) Lothal D) Mohenjodaro
 
Answer & Explanation Answer: A) Harappa

Explanation:
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Filed Under: Indian History

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Q:

Kurukshetra , the sence of the epic battle between Kauravas and pandavas, is situated in 

A) Gujarat B) Punjab
C) Uttar Pradesh D) Haryana
 
Answer & Explanation Answer: D) Haryana

Explanation:
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Filed Under: Indian History

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Q:

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

A) 2.87 sec B) 3.44 sec
C) 4.65 sec D) 5.41 sec
 
Answer & Explanation Answer: B) 3.44 sec

Explanation:

It is launched vertically with an initial speed of 110 ft/sec.

It will reach maximum height when the speed drops to 0.

Vo=110 feet per second 

ho=2 feet 

So, h(t) = -16t^2 +110t +2 

Take the derivative: h'(t) = 110 -32t 

The maximum height will be at the inflection when the derivative crosses the x-axis, then h'(t)=0. 

So, set h'(t)=0 and solve for t: 

0 = 110 -32t 

-110 = -32t 

t=3.4375 

t=3.44 seconds.

 

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

When and by whom the PIN coode system was introduced in India ?

A) Savinder Singh B) Shriram Bhikaji Velankar
C) D.R. Khullar D) Mahesh Barnwal
 
Answer & Explanation Answer: B) Shriram Bhikaji Velankar

Explanation:

The PIN code system was introduced on 15 th August 1972 by Shriram Bhikaji Velankar. Currently India has six digit post code and soon it will be converted in eight digits.

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Filed Under: Indian Geography
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

29 6745
Q:

What is the currency of cuba?

A) Kuna B) Peso
C) Dollar D) None
 
Answer & Explanation Answer: B) Peso

Explanation:

Peso is the currency of Cuba

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Filed Under: General Awareness

33 6743
Q:

The memory unit is one part of

A) Input Device B) Central Processing Unit
C) Control Unit D) Output device
 
Answer & Explanation Answer: B) Central Processing Unit

Explanation:

In a computer, memory is one part of Central processing unit i.e, CPU.

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Q:

GUI stands for

A) Graphical Universal Interface B) Graph Use Interface
C) Graphical Unique Interface D) Graphical User Interface
 
Answer & Explanation Answer: D) Graphical User Interface

Explanation:

GUI stands for Graphical User Interface.

 

A Graphical User Interface is a computer interface that allows users to interact with a device through graphical elements such as pictures and animations, as opposed to text-based commands.

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