Why is weighing important in glass batch preparation?
B
To prevent color formation
C
To ensure accurate proportions of raw materials
D
To make the glass harder
Analysis & Theory
Accurate weighing ensures the correct chemical composition and consistent quality of the final glass.
Which equipment is commonly used for weighing batch materials in glass plants?
C
Electronic or mechanical balance
Analysis & Theory
Electronic or mechanical balances are used to precisely measure each raw material before mixing.
Overweighing a batch component can result in:
C
Deviation from desired glass properties
Analysis & Theory
Even a small error in weighing can lead to significant deviations in glass composition and quality.
Which material is typically weighed in the highest quantity in a soda-lime glass batch?
Analysis & Theory
Silica sand is the major component and is typically weighed in the largest proportion.
What is a common practice to improve weighing efficiency and accuracy?
A
Use of approximate hand measurements
C
Automation and computerized batching systems
D
Guesswork based on previous batches
Analysis & Theory
Modern plants use automated systems for accurate, repeatable, and efficient batch weighing.
In batch preparation, which factor most affects the precision of weighing?
C
Calibration of the balance
D
Color of the raw material
Analysis & Theory
A well-calibrated balance is essential to ensure weighing accuracy.
Which of the following is true about batch house operations in glass plants?
A
Only manual weighing is used
B
Weighing is unnecessary for cullet
C
Each raw material is weighed separately before mixing
D
All raw materials are estimated visually
Analysis & Theory
Each raw material is carefully weighed individually to maintain the required batch composition.
Which of the following errors can occur if weighing is not properly monitored?
C
Inconsistent melting behavior
Analysis & Theory
Inaccurate weighing can cause uneven melting and poor quality in the final product.
Which batch component is typically weighed last to avoid premature reactions or clumping?
Analysis & Theory
Salt cake (Na₂SO₄) is often added last due to its hygroscopic nature and tendency to react or clump.
What safety practice should be followed during weighing in glass batch preparation?
B
Handling without gloves
C
Proper labeling and dust control
D
Skipping weighing for minor ingredients
Analysis & Theory
Proper labeling and dust control are essential for safety and accuracy during weighing.