What does To Deliver (TD) indicate about an apparatus?

• A. The container is made to hold exactly the volume printed on the container.
• B. The device is used to calibrate a thermometer against standards.
• C. The apparatus is made to deliver that exact amount into another container.
• D. The glassware is classified as Class A or Class B.

Answer: (C)

The idea being tested is how to interpret the marking “To Deliver.” When a device is marked TD, it is calibrated to dispense that exact volume into another container. In practice, you use it to transfer a precise amount, knowing the delivered volume matches the marked value, even though some residual liquid may remain in the dispensing device after delivery. This is different from devices marked to contain, which are designed to hold the stated volume and are typically read or emptied differently.

So the best fit is that the apparatus is made to deliver that exact amount into another container. The other options don’t apply: it’s not about containing a volume exactly in the container, not about calibrating a thermometer, and it isn’t a Class A or B classification.