A weeping relief valve on a hot water boiler may be an indication of :

A weeping relief valve on a hot water boiler may be an indication of
 
  A) An extinguished pilot light
  B) A water-logged expansion tank problem
  C) A circulating pump that is running continuously
  D) Low return water temperature

 Q. 2

What is a low water cut out?
 
  A) it is an operating control that shuts off the boiler at the end of every operating cycle when it senses that the boiler has used up its supply of water
  B) it is a safety device that shuts off the boiler if the water level is low
  C) it is an operating control that energizes the water fill solenoid at the end of an automatic blow-down cycle
  D) it is a hand valve installed near the bottom of the boiler that is used for filling and servicing the boiler

 Q. 3

In order to facilitate air removal, a diaphragm-type expansion tank should be placed
 
  A) above the highest terminal unit. B) on the supply side of the boiler.
  C) above the boiler, below the roofline. D) on the discharge side of the boiler.