Engine: Expired / General Subjects

1. A Water-tube boilers should be filled with water from 70F to 160F, and fire-tube boilers should oo be filled with water from 70F to 100F. oo
2. B Fire-tube boilers should be filled with water from 60F to 170F, and water-tube boilers should oo be filled with water from 60F to 100F. oo
3. C Fire-tube boilers should be filled with water from 70F to 160F, and water-tube boilers should oo be filled with water from 70F to 100F. oo
4. D Water-tube boilers should be filled with water from 60F to 170F, and fire-tube boilers should oo be filled with water from 60F to 100F.

Tip: press A-D to answer