Which of the following is used to make a glass-glass evacuated tubes?
A. Borosilicate glass
B. Carbon
C. Wood
D. Plastic coating
Answer:A
Which of the following is used to make a glass-glass evacuated tubes?
A. Borosilicate glass B. Carbon C. Wood D. Plastic coating
Explanation: As the name suggests, glass-glass evacuated tubes is a type of evacuated-tube solar collector. It is made up of two borosilicate glass tubes fused together at one or both ends.