WASTEWATER COLLECTIONS 2 EXAM STUDY GUIDE
QUESTIONS WITH CORRECT ANSWERS
What are the three types of float controllers? -- Answer ✔✔ Rod-attached floats, steel
tape, cable, or rope attached floats, Mercury switch float controls.
Ball floats are usually attached to a float rod, the float rod is equipped with brass stops.
explain how these stops are used to select the wet well rise and fall levels. -- Answer
✔✔ Thes stops determine the level of the wastewater in the wet well. The wet well rise
and fall levels are selected or Changed by moving the rods stops to new positions on
the float rod.
What are the limitations of rope or cable attached float control systems? -- Answer ✔✔
a) Grease and debris may hinder or stop the movement of the float and will need to be
removed. b) The float attachment line may break. c) Floats develop leaks which may
change pump operation. d) Cables attached to the float can become twisted.
How does an ultrasonic level detector measure water levels? -- Answer ✔✔ A
transducer is mounted above the highest water level in the wet well, the transducer
generates an ultrasonic process which hits the water surface and bounces back to the
transducer. The system measures the travel time and converts this information into an
electrical signal in the control system.
QUESTIONS WITH CORRECT ANSWERS
What are the three types of float controllers? -- Answer ✔✔ Rod-attached floats, steel
tape, cable, or rope attached floats, Mercury switch float controls.
Ball floats are usually attached to a float rod, the float rod is equipped with brass stops.
explain how these stops are used to select the wet well rise and fall levels. -- Answer
✔✔ Thes stops determine the level of the wastewater in the wet well. The wet well rise
and fall levels are selected or Changed by moving the rods stops to new positions on
the float rod.
What are the limitations of rope or cable attached float control systems? -- Answer ✔✔
a) Grease and debris may hinder or stop the movement of the float and will need to be
removed. b) The float attachment line may break. c) Floats develop leaks which may
change pump operation. d) Cables attached to the float can become twisted.
How does an ultrasonic level detector measure water levels? -- Answer ✔✔ A
transducer is mounted above the highest water level in the wet well, the transducer
generates an ultrasonic process which hits the water surface and bounces back to the
transducer. The system measures the travel time and converts this information into an
electrical signal in the control system.
