Figs. 2,789 to 2,794.—Self oiling self aligning bearing open. Views showing oil grooves, rings, bolts etc.
Ques. Name an important point to be considered in selecting a generator.
Ans. Its efficiency.
Ques. What are the important points with respect to efficiency?
Ans. A generator possessing a high efficiency at the average load is more desirable than a generator showing a high efficiency at full load.
Ques. Why?
Ans. The reason is that in station practice the full load limit is seldom reached, the usual load carried by a generator ordinarily lying between the one-half and three-quarter load points.
Ques. How do the efficiencies of large and small generators compare?