1 Charge costs to cost objects. 2  Use an activity driver to allocate the contents of each primary cost pool to cost objects. 3  There will be a separate activity driver for each cost pool.
1 People who have a positive TB skin test with a normal chest X-ray are NOT contagious, but may need medicine to prevent them from ever getting active TB. 2  Children under the age of 12 with active TB are rarely contagious, and do not need to be kept out of school.ow often does a TB test have to be repeated? If you have a negative skin test, you need a repeat test at least every four years. If you have a documented positive skin test, you must have an initial chest X-ray. After that, you still need to be screened every four years.
When you take a TB test, it takes about 48 hours to see if its positive or not. If a wheal (bump) forms and its itchy, DON'T scratch it, its really bad for the skin if you do.If its positive, you don't need to keep doing the TB test in the future, just the chest x-ray. Chickey Â· 6 years ago. Thumbs up.hen you take a TB test, it takes about 48 hours to see if its positive or not. If a wheal (bump) forms and its itchy, DON'T scratch it, its really bad for the skin if you do. If its positive, you don't need to keep doing the TB test in the future, just the chest x-ray. Chickey Â· 6 years ago. Thumbs up.