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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 ?    35 Yes 10 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 ?    19 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 ?    7 Yes 0 No
Shivaji
 
Answer
# 4
ball pen functions on the principle of surface tension 
Is This Answer Correct ?    8 Yes 3 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 1 No
Thirupati
 
Answer
# 7
friction between pen and paper 
Is This Answer Correct ?    7 Yes 22 No
Navdeep
 

 
 
 
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what are the pistion type? RRB 1
If we measure the pressure of Air in duct with the help of Pitot tube attached to manometer (pitot tube) whose one end is in atmosphere and one end is in duct and manometer shows some head whether it is Static head or Dynamic Head or (Total head=Static head + dynamic Head). and if it is total head in which static head is zero then how static head is zero.   2
what is the refrigerent Blue-Star 5
what is mechanical TATA 4
what is mean ovality?, how it is measured? Greaves 8
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1] wht is the relation between degree celcius and fahrenhite ? 2] wht is quality and ISO ? MAHINDRA 2
What is engine? BMW 6
what is mean nx6   2
What is the difference between general arc welding and alumimium welding?   3
How would you know you were successful on this job? Petro-Star-Mount 1
 
For more Mechanical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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