Foundry tools — purpose of a gagger in moulding practice Evaluate the statement: “A gagger is used for cleaning the moulding sand.” Select the correct response.

Introduction / Context:
Foundry hand tools have specific roles in preparing a sound mould. Misunderstanding tool functions leads to weak moulds, fins, or collapses during pouring. A common confusion is between tools used to reinforce moulds and those used to prepare or clean sand.

Given Data / Assumptions:

• Gagger: an L-shaped or hooked iron rod placed in the mould to support overhanging sand in the cope.
• Cleaning or conditioning sand is done with riddles, sieves, or mullers, not gaggers.
• We are discussing green-sand moulding operations.

Concept / Approach:
The gagger functions as a reinforcement, anchoring the cope sand to prevent it from dropping into the mould cavity. It is embedded so that its hooked part grips the sand while the straight portion projects into the cope, sometimes tied to the cope bars. Tools used for cleaning/conditioning include riddles, shovels, and sand mullers; finishing is done by slicks, lifters, and swabs.

Step-by-Step Solution:
Identify the tool in question: gagger (a support rod).Match function: supporting and reinforcing sand, not cleaning.Conclude the statement is incorrect.

Verification / Alternative check:
Illustrations in foundry manuals show gaggers placed above undercuts in the cope to hold sand; none list them as cleaning devices.

Why Other Options Are Wrong:

• “Correct” and conditional options misattribute the gagger's purpose.
• Sand binder type does not convert a reinforcement rod into a cleaning tool.

Common Pitfalls:
Mixing up gaggers with lifters or slicks; lifters finish deep, narrow impressions, whereas gaggers provide structural support to the sand mass.

Final Answer:
Incorrect