Question

A thief sneaked into Marry's house. As he opened the door to Larry's room, the door made a squeaking noise. The noise alerted Larry and the thief was caught. The squeaking sound of a door can be reduced by
(1 Point)
A) Using ball bearings in the door hinge
B) Using a lubricant on the door hinge
C) Using a lever to open the door
D) Using a gear to open the door

Answer 1

B) Using a lubricant on the door hinge

Explanation:

Lubrication would reduce the interlocking of 2 objects

Answer 2

Answer:

The correct option is:

Using a lubricant on the door hinge. (Option b)

Explanation:

• The door makes a squeaking noise due to the lack of friction caused by dirt/dust particles.
• It can also be due to the lack of lubrication between the metal surface of the hinge and the hinge pin.
• As a result, both the metals rub against each other while we open and close the door, which creates the squeaking noise.
• Lubrication can help in reducing this squeaking sound produced by the doors.
• Lubricants can be applied to the hinges of the door.
• Sometimes the hinge pin must be removed for the effective application of the lubricants.
• Various lubricants can be used for this purpose, such as hairspray, oil, petroleum jelly, paraffin candles, etc.
• Lubricants help to move the door smoothly with little resistance or friction from other parts.