Caulking is a process used to make joints ______.

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NHPC JE Mechanical 6 April 2022 (Shift 2) Official Paper
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  1. indent proof
  2. colour proof
  3. leak proof
  4. corrosion proof

Answer (Detailed Solution Below)

Option 3 : leak proof
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Detailed Solution

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Explanation:

For rivets used in pressure vessels and boilers, caulking and fullering are primarily used to obtain leak-proof joints.

Drift: It is used to align the holes to be riveted.

Caulking tool: It is used for closing down the edges of the plates and heads of the rivets to form a metal-to-metal joint.

Fullering tool: It is used for pressing the surface of the edge of the plate. It helps to make fluid-tight joints.

Fitter 29 12

Caulking is used to make the riveted joint leak proof or fluid-tight in pressure vessel like steam boilers, air receivers and tank etc.

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