Wastewater collections (Class II) Quizzes & 100%
Correct Answers
The amount of oxygen that nay become dissolved in a given amount of water is MOST
related to...
Tempertaure
The gas most commonly associated with septic wastewater is...
Hydrogen sulfide
What determines the amount of hydrogen sulfide produced in a sewer?
pH
Four conditions are necessary to create an explosion. Three of these conditions are:
combustible gas, adequate oxygen, and sufficient heat.
What is the fourth condition?
Proper mixing of gas and oxygen
One kilowatt is the equivalent of _____________ horsepower.
1.34
The lack of an unpleasant odor in a manhole, lift station, or other structures does NOT
always mean that no dangerous gases are present because...
-Most dangerous gases have no odor
, -Oxygen may still be lacking
-Some gases deaden the sense of smell
As the impeller wears on a pump, the pump efficiency will...
Decrease
How closely an instrument measures the actual value of the process variable being
measured is called its...
Accuracy
Vibrations in pumps may be caused by improper motor-pump...
Alignment
Advantages of a video tape recording system include...
Length and severity of defective areas can be recorded
The MOST widely used type of prime mover in a pumping plant is...
Electric motor
"Schedule 40" refers to...
Wall thickness
Hazards that may damage a TV camera going through a sewer include...
- Deep water that submerges the camera
Correct Answers
The amount of oxygen that nay become dissolved in a given amount of water is MOST
related to...
Tempertaure
The gas most commonly associated with septic wastewater is...
Hydrogen sulfide
What determines the amount of hydrogen sulfide produced in a sewer?
pH
Four conditions are necessary to create an explosion. Three of these conditions are:
combustible gas, adequate oxygen, and sufficient heat.
What is the fourth condition?
Proper mixing of gas and oxygen
One kilowatt is the equivalent of _____________ horsepower.
1.34
The lack of an unpleasant odor in a manhole, lift station, or other structures does NOT
always mean that no dangerous gases are present because...
-Most dangerous gases have no odor
, -Oxygen may still be lacking
-Some gases deaden the sense of smell
As the impeller wears on a pump, the pump efficiency will...
Decrease
How closely an instrument measures the actual value of the process variable being
measured is called its...
Accuracy
Vibrations in pumps may be caused by improper motor-pump...
Alignment
Advantages of a video tape recording system include...
Length and severity of defective areas can be recorded
The MOST widely used type of prime mover in a pumping plant is...
Electric motor
"Schedule 40" refers to...
Wall thickness
Hazards that may damage a TV camera going through a sewer include...
- Deep water that submerges the camera
