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A patient has a hemoglobin of 7.1 g/dL.  The surgeon wants to raise the hemoglobin to 10 g/dL before surgery.  How many units of RBC need to be administered to this patient to raise the hemoglobin to the required level?

A patient with M. pneumoniae infection will most likely develop a cold autoantibody with specificity to which antigen?

Which of the following would be cause for deferral?

A high incidence antigen is present in 

Anti-H is found in the sera of individuals of group

A forward group is performed, with the following results: Anti-A            Anti-B            Anti-A, B 4+                    0                    4+ The expected results for the reverse grouping would be

A unit of blood is returned to the blood-transfusion facility. It had been issued 15 minutes previously.  A patient emergency prevented the transfusion from being attempted.  The nurse had taken the precaution of placing it in the refrigerator on the nursing floor that is used for medications 2-8C.  The unit has not been entered and still has two segments attached.  Assuming that visual inspections reveals no hemolysis or other abnormalities, can the unit be reissued?

A furnace keeps the temperature inside a building at 22oC. The temperature outsidethe building is a constant 15oC. At noon the furnace is turned off and by 3:00 pm, the temperatureinside the building has dropped to 18oC. Let  denote the temperature inside the building at time  hours after noon. Assume Newton’s law of cooling

 In DC generators, current is fed up to the external circuit from armature through _______

In PMDC motors we use magnetic material with ___________