Question 2 of 30
The liquid inside a standard wet card magnetic compass is a specific mixture of:
A
Seawater and kerosene
B
Distilled water and pure ethylene alcohol
C
Glycerin and heavy oil
D
Pure acetone
Advertisement
Answer & Explanation
The correct answer is Option B: Distilled water and pure ethylene alcohol.
The compass card in a liquid-filled magnetic compass is suspended in a mixture of distilled water and pure ethylene alcohol, which prevents freezing at low temperatures and ensures smooth damping of the card.