Q. How long have you run an engine?
Q. Have you done your own firing?
Q. What kinds of engines have you run?
Q. What would be your first duty if called upon to take charge of an engine?
A. To ascertain the exact condition of the boiler and all its attachments, such as safety valve, steam gauge, water gauge and cocks, pump, injector, blow-off valve, etc.; also the engine.
Q. How often would you blow off your boiler?
A. Once a week or month, according to the condition of feed water used.
Q. How many feet of heating surface is allowed per horse-power by builders of boilers?
A. From 12 to 15 square feet for flue and tubular boilers.
Q. How much steam pressure will be allowed on a boiler 40 inch diameter, ⅜ thick, 60,000 pounds T. S., ⅛ T. S. factor of safety?