Generating Inbred Mice. Inbred Strains. A strain is defined as inbred when it has been mated brother x sister for 20 or more consecutive generations (F20). All offspring can be traced back to a single ancestral breeding pair in the 20th or subsequent generation.
suction head. The energy per unit weight of fluid on the suction side of a pump. 1  Facebook.
This limits the suction head of any pump to 33.9 feet, but only if perfect vacuum occurs in the pump. Thus, suction head is limited to about 26 feet. In addition, engine performance decreases by approximately 3.5% per 1,000 feet of elevation.