What is the primary function of an air screen cleaner?
C
Cleaning and grading seeds based on size and weight
Analysis & Theory
An air screen cleaner separates seeds based on size (screens) and weight (air aspiration).
Which of the following components is NOT part of a typical air screen cleaner?
Analysis & Theory
Air screen cleaners typically consist of a blower, screens, hopper, and shaker but not a magnet.
The air in an air screen cleaner helps in removing:
Analysis & Theory
The blower removes light impurities like chaff, dust, and husks by aspiration.
Screens in an air screen cleaner are used to separate seeds based on:
Analysis & Theory
Screens of various mesh sizes help separate seeds based on their physical size.
In which section of the air screen cleaner does aspiration take place?
Analysis & Theory
The blower section generates airflow to aspirate light impurities from the seed mass.
What determines the airflow rate in an air screen cleaner?
B
Fan speed and duct size
Analysis & Theory
Airflow rate is controlled by fan speed and the design of ducts to achieve proper aspiration.
What is the role of vibration or shaking in an air screen cleaner?
C
Facilitate seed movement and sieving
Analysis & Theory
Shaking ensures uniform distribution and movement of seeds across the screens for effective separation.
The top screen in an air screen cleaner is used to remove:
Analysis & Theory
The top screen removes large-sized foreign materials like straw and stones.
The bottom screen in an air screen cleaner separates:
C
Undersized seeds and inert material
Analysis & Theory
The bottom screen lets through undersized seeds and small impurities not desired in the final product.
Which of the following crops is commonly cleaned using an air screen cleaner?
Analysis & Theory
Cereal grains like rice, wheat, and pulses are commonly cleaned using air screen cleaners.