A. From 25 to 30.
Q. What is meant by atmospheric pressure?
A. The weight of the atmosphere.
Q. What is the weight of atmosphere at sea level?
A. 14.7 pounds.
Q. What is the coal consumption per hour per indicated horsepower?
A. Varies from one and a half to seven pounds.
Q. What is the consumption of coal per hour on a square foot of grate surface?
A. From 10 to 12 pounds.
Q. What is the water consumption in pounds per hour per indicated horsepower?