What are some requirements for a two-pump motor circuit?
What will be an ideal response?
The requirements for a two-pump motor circuit include:
1. The pump motors are operated by a 480 volt three-phase system, but the control circuit must operate on a 120-volt supply.
2. Each pump motor contains a separate overload protector. If one pump overloads, it must not prevent operation of the second pump.
3. A manual ON-OFF switch can be used to control power to the circuit.
4. A pressure switch mounted on the tank controls the operation of the pump motors. When the pressure of the tank drops to a certain level, one of the pumps will be started. When the tank has been filled with water, the pressure switch will turn the pump off. When the pressure of the tank drops low enough again, the other pump will be started and run until the pressure switch is satisfied. Each time the pressure drops to a low enough level, the alternate pump motor will be used.
5. An override switch can be used to select the operation of a particular pump, or to permit the circuit to operate automatically.
You might also like to view...
The analog meter makes use of Ohm's law to measure and display the electrical characteristics of the circuit.
Answer the following statement true (T) or false (F)
Match the following definitions to their related terms
a. of or pertaining to the household b. wearing away c. drinkable d. the level below which soil is saturated e. water-bearing rock formation f. when water is added to soil until all spaces are filled g. changing from a liquid to a vapor or a gas h. areas with continuous, severe water shortages 1. evaporation 2. potable 3. domestic 4. desert 5. water table 6. saturated 7. erosion 8. aquifer
Which of the following is the false concept, which held that the Spanish conquerors merely tortured and butchered the Indians, stole their gold, infected them with smallpox, and left little but misery behind?
A. Dark Myth B. European Legend C. Black Legend D. Spanish Myth E. Tragic Death
A compressor takes 1.2 cu in of gas at a pressure of 14.7 psia and compresses it into a volume of 0.35 cu in. If the temperature of the gas remains the same, find the pressure of the gas in psia after it is compressed. Round the answer to the nearer hundredth psia.
Fill in the blank(s) with the appropriate word(s).