A. An engine in which the amount of steam supplied is regulated by changing the pressure at which it enters the cylinder in accordance with the variation of the load.
Q. What is a Governor engine?
A. An engine in which the supply of steam is regulated by the governor.
Q. Into what classes may the Automatic cut-off engine be divided?
A. Into two classes: The four valve engine, in which the cut-off is usually effected by a detaching mechanism or trip under the control of the governor; the single valve engine, in which the point of cut-off is varied by changing the amount of travel of the valve.
Q. Give examples of the single valve type.
A. High speed, self-contained engines which have shaft governors.
Q. What are their advantages?
A. High rotative speed, compactness, portability, light weight and simplicity.