CREST CPSA UPDATED ACTUAL EXAM QUESTIONS CORRECT ANSWERS GRADED A PLUS
Question:
Two wastewater tests commonly used to measure the strength of sewage are the ________ test and
the ________ test.
Answer:
BOD, TSS
Question:
The minimum water usage rate that should be used for planning an OSSF for a new home with three
bedrooms and 3000 square feet of interior living area is _______ gallons/day.
Answer:
300
Question:
Blockage in the home plumbing system is often caused by _______, ________, and _________.
Answer:
oils, greases, and fats
Question:
It is recommended that _____________ are not used because they significantly increase the amount
of suspended solids and organic matter that is discharged to sewage disposal system.
Answer:
garbage disposal
,Question:
Several samples were taken from a small washateria with seven new water-conserving machines and
sent to a lab for BOD analysis. The average BOD was 406 mg/L. What would be the minimum
expected BOD (organic) loading in lbs./day?
Answer:
4.74 lbs/day
Question:
Would a treatment plant capable of handling 1500 gallons per day of wastewater with BOD as high
as 280 mg/L be capable of handling wastewater from the above washateria? What is the organic
loading capacity of this treatment plant?
Answer:
3.50 lbs/day
Question:
What is the loading rate of a system with: Q= 550GPD, BOD= 350 mg/L, Ph=8.4, TSS= 400 mg/L.
Answer:
1.6 lbs/day
Question:
The most commonly use primary treatment component in Texas for on- site systems is the.
Answer:
septic tank
Question:
Which of the following produces the highest quality effluent?
Answer:
city sewage treatment plant
, Question:
what is the purpose of the inlet baffle or T?
Answer:
Reduce velocity and disperse flow, vent the tank to the building plumbing
Question:
The minimum distances a watertight sewage treatment tank should be from a water-well and a
property line are.
Answer:
50 feet and 5 feet respectively
Question:
which of the following is true regarding septic tanks?
Answer:
The must have two- or three-compartments
Question:
A septic tank serving a new five-bedroom home with 3800 sqft must have a minimum capacity of.
Answer:
1,250 gallons
Question:
Of what materials may a septic tank be constructed?
Answer:
steel reinforced concrete
Question:
Two wastewater tests commonly used to measure the strength of sewage are the ________ test and
the ________ test.
Answer:
BOD, TSS
Question:
The minimum water usage rate that should be used for planning an OSSF for a new home with three
bedrooms and 3000 square feet of interior living area is _______ gallons/day.
Answer:
300
Question:
Blockage in the home plumbing system is often caused by _______, ________, and _________.
Answer:
oils, greases, and fats
Question:
It is recommended that _____________ are not used because they significantly increase the amount
of suspended solids and organic matter that is discharged to sewage disposal system.
Answer:
garbage disposal
,Question:
Several samples were taken from a small washateria with seven new water-conserving machines and
sent to a lab for BOD analysis. The average BOD was 406 mg/L. What would be the minimum
expected BOD (organic) loading in lbs./day?
Answer:
4.74 lbs/day
Question:
Would a treatment plant capable of handling 1500 gallons per day of wastewater with BOD as high
as 280 mg/L be capable of handling wastewater from the above washateria? What is the organic
loading capacity of this treatment plant?
Answer:
3.50 lbs/day
Question:
What is the loading rate of a system with: Q= 550GPD, BOD= 350 mg/L, Ph=8.4, TSS= 400 mg/L.
Answer:
1.6 lbs/day
Question:
The most commonly use primary treatment component in Texas for on- site systems is the.
Answer:
septic tank
Question:
Which of the following produces the highest quality effluent?
Answer:
city sewage treatment plant
, Question:
what is the purpose of the inlet baffle or T?
Answer:
Reduce velocity and disperse flow, vent the tank to the building plumbing
Question:
The minimum distances a watertight sewage treatment tank should be from a water-well and a
property line are.
Answer:
50 feet and 5 feet respectively
Question:
which of the following is true regarding septic tanks?
Answer:
The must have two- or three-compartments
Question:
A septic tank serving a new five-bedroom home with 3800 sqft must have a minimum capacity of.
Answer:
1,250 gallons
Question:
Of what materials may a septic tank be constructed?
Answer:
steel reinforced concrete
