Question

You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled.
A. Lubricating the tubing with water or glycerin.
B. Using a towel or cotton gloves for protection.
C. Twisting the tubing and stopper carefully.
D. All of the above.

Answer 1

Answer:

D. All of the above

Explanation:

We can place a piece of glass tubing into rubber stopper after the tubing has been fire polished and cooled by

Lubricating the tubing with water or glycerin.

Using a towel or cotton gloves for protection.

or by

Twisting the tubing and stopper carefully.

Hence we can say that all the above methods are equally useful for the above procedure.

Answer 2

In this case, it is required to use a towel or cotton gloves for protection, twist the tubing and stopper carefully, lubricate the tubing with water or glycerin (All options are correct).

• Protective gloves are useful tools used during work in order to cover and protect the hands.

• Glycerol (glycerin) is a polyol liquid compound, which exhibits certain characteristics (i.e., it is colorless, odorless, and viscous).

• Glycerol is non-toxic and is an excellent water-based lube.

In conclusion, it is required to use a towel or cotton gloves for protection, twist the tubing and stopper carefully, lubricate the tubing with water or glycerin (All options are correct).

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