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Question
working principle of ballpoint pen?
 Question Submitted By :: Mechanical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
HYDRODYNAMIC LUBRICATION

Pen is fitted with a tiny ball bearing in its tip. As the pen moves along the paper, the ball rotates picking up ink from the ink cartridge and leaving it on the paper.
 
Is This Answer Correct ?    37 Yes 12 No
Vijaygadu
 
Answer
# 2
it works on two principles
- frictional force between pen and paper.
- gravitaional force due to which ink flows in downward direction.
 
Is This Answer Correct ?    21 Yes 6 No
Atul Tripathi
 
 
 
Answer
# 3
it works on the principle of gravitational force.due to
gravitational force ink flows downword direction.
 
Is This Answer Correct ?    9 Yes 0 No
Shivaji
 
Answer
# 4
ball pen functions on the principle of surface tension 
Is This Answer Correct ?    8 Yes 4 No
Suguna
 
Answer
# 5
Ball is fixed in the tip of the pen. Ball is rotated by the
friction with paper.due to capillary action (the gap
between ball and ball holder is min) the ink flows between
ball and ball holder and it is printed on the paper.
 
Is This Answer Correct ?    6 Yes 3 No
Rajasekar
 
Answer
# 6
-gravitaional force due to which ink flows in downward
direction.
 
Is This Answer Correct ?    3 Yes 2 No
Thirupati
 
Answer
# 7
friction between pen and paper 
Is This Answer Correct ?    7 Yes 22 No
Navdeep
 

 
 
 
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how the velocity of the liquid is converted into pressure energy in a volute casing? finally we are getting high velocity or high pressure?   3
what happen if we put petrol in a diesel engine Honda 2
Why Air Conditioner capacity measured in Ton. Like 1.5ton TATA 1
What is pour point?   2
what is screw pump   2
Suppose a steel bar of cross sectional area A is subjected to load P at one end and 2P at the other end ,what will be the induced stress in the bar? BARC 4
How many earthing pits required for diesel generator set ? Why ? GTL 12
id 35.00mm ,od 72.00mm & width 23.00mm .how to calculate bearing number. Bhel 3
One TR = ?kacl/hour One US Gallon = ?liters Balco 3
What is the difference between induced draft cooling tower& natural draft cooling tower?   2
Is there any problem occur in steam turbine if generator works as a motor?   2
why thickest layer of ice is formed at windshield of a car not in the window?   1
 
For more Mechanical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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