Final answer:
The best probe to check the temperature of a pork roast is a penetrating thermometer, as it can easily measure the internal temperature of the meat.
Step-by-step explanation:
The best probe to check the temperature of a pork roast would be a penetrating thermometer. A penetrating thermometer has a sharp probe that can easily be inserted into the meat to measure the internal temperature. This type of thermometer provides an accurate reading and ensures that the pork roast is cooked to the proper temperature for safe consumption.
A bimetallic stemmed thermometer is not ideal for checking the temperature of a pork roast. It is designed to measure the temperature of air or liquids and may not provide an accurate reading when inserted into the meat.
It is important to note that the USDA recommends cooking pork to an internal temperature of 145°F (63°C).