The purpose of a supply pressure gauge is
1. to tell you how hot the air in the tank is
2. to warn you only if there is too little air in the tank
3. to tell you how much air is in the tank
Answer : 3. to tell you how much air is in the tank
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A. series B. parallel C. RC D. RL
Photosynthesis reaches to the bottom of the limnetic zone
Indicate whether the statement is true or false
When doing a standard service entrance calculation and applying the demand factor to the total load of the general lighting load, the small appliance circuits, and the laundry circuit, the first ___________ volt-amperes are computed at 100%.
a. 2000 b. 2500 c. 3000 d. 4000
What controls the firing of a water boiler?
A) The auxiliary switch on the zone valve B) A wall thermostat that senses the temperature of the house C) The boiler water temperature is normally maintained by the high limit and the low water cutout. D) An aquastat that senses the temperature of the water in the boiler