Topics: Animal Refresher, Poultry Science

Singing Time for Poultry Carcass Processing

The singing time for poultry (passing carcass over blue flame to burn hair-like appendages) is:

5–10 seconds over blue flame
10–20 seconds over blue flame
20–25 seconds over blue flame
30–60 seconds over blue flame

Singing Time for Poultry Carcass Processing

The singing time for poultry (passing carcass over blue flame to burn hair-like appendages) is:

Options

5–10 seconds over blue flame ✓
10–20 seconds over blue flame
20–25 seconds over blue flame
30–60 seconds over blue flame

Correct Answer: A

Explanation in English

Correct Answer: 5–10 seconds over blue flame

Singing is the process of passing the plucked poultry carcass over a blue flame for 5–10 seconds to burn off the tiny, hair-like feather appendages (filoplumes) that remain after de-feathering.

Singing vs. Scalding — Key Differences

Process	Purpose	Method
Scalding	Loosen feathers for plucking	Immersion in hot water (58–60°C / 1 min)
Singing	Burn residual hair-like appendages	Blue flame, 5–10 seconds

Why Blue Flame?

A blue flame (complete combustion) is hotter and cleaner than a yellow/orange flame.
It burns the fine filoplumes quickly without scorching the skin.
5–10 seconds is sufficient; longer exposure would burn or discolour the carcass skin.

Why Other Options Are Wrong

10–20 seconds → too long; risks burning and discolouring the skin.
20–25 seconds → excessively long; would damage the carcass.

📚 About this Topic — Animal Refresher

This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.

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