Q. Why do pumps fail to work at times?
A. Leak in the suction, leak around the plunger, leaky check valve, or valve out of order.
Q. Why do injectors fail to work at times?
A. Leak in suction, grit or dirt under seat of valve, or valve not seated properly.
Q. How often should a boiler be examined and tested?
A. Twice a year at least.
Q. How would you test a boiler?
A. By tapping it with a light hammer, and hydrostatic test, using warm water.
Q. Where does the feed water enter the boiler?