# GATE (TF) Textile 2022 Question Paper Solution | GATE/2022/TF/18

###### Question 18 (Textile Technology & Fibre Science)

A three-bladed beater is running with an angular velocity of 600 rpm and delivering material at a rate of 600 kg/h. Number of strikes per kg of delivered material (in integer) is _____.

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Given in the question-
Angular velocity of three bladed beater=600 rpm

Delivery speed=600 kg/hr
=600/60 kg/min
=10 kg/min

The number of strikes per kg of delivered material=?

The number of strikes per kg of delivered material=Angular velocity of beater x No.of blades/Delivery speed of material

The number of strikes per kg of delivered material=600 x 3/10

The number of strikes per kg of delivered material=180 (Answer)

### What is beater ?

A beater is a machine used in the papermaking process to break down and homogenize the fibers in a suspension of fibers and water (known as the “furnish”). The beater’s purpose is to improve the uniformity and strength of the resulting paper by thoroughly mixing the fibers and reducing the size of any clumps or agglomerates in the furnish.

Beaters can have a variety of designs and operate using different mechanical principles, but they all serve the same basic function. Some common types of beaters include the Hollander beater, the Dandy Roll beater, and the Rotary Knife beater.
In addition to breaking down the fibers, beaters can also be used to add fillers, dyes, or other additives to the furnish.

The intensity of the beating process can be adjusted to produce paper with different properties, such as strength, smoothness, and porosity. Overall, the beater is an important step in the papermaking process that helps ensure the quality and consistency of the final product.