Which nut can be easily operated with thumb and finger?

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 1
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  1. Capstan Nut
  2. Dome Nut
  3. Wing Nut
  4. Lock Nut

Answer (Detailed Solution Below)

Option 3 : Wing Nut
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Detailed Solution

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Explanation:

Nut

A nut is a type of fastener with a threaded hole.

There are the following types of nut used.

Dome nut

 

F1 Ashik Madhu 28.08.20 D1

  • The dome nut is similar to the hexagonal nut with a spherical cap at the top.
  • It is also known as Acorn Nuts or Cap nuts.
  • The dome nut is used to protect the end of the bolt from corrosion.

Capstan Nut

 

F1 Ashik Madhu 28.08.20 D2

  • This is in the form of a cylinder with holes drilled in the curved surface.
  • These holes can be used to turn the nut by placing a Tommy bar in it.

 

Wing Nut

 

  • The wing nut is used to tightening two mating parts by hand and is used for light-duty purposes.
  • When the mating parts are frequently used to adjust (such as tightening of hacksaw blade), this nut is used.

 

 

Lock nut
  • The thin lock nut is first tightened down with ordinary force, and then the upper nut (thicker nut) down upon it.
  • The upper nut is then held tightly while the lower nut is slackened back against it.
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