CRSS EXAM REVIEW SOLVED QUESTIONS COMPLETE ANSWERS GRADED A PLUS
Question:
List four water saving plumbing devices that can be used in a home.?
Answer:
low flow toilets, low flow shower head, low flow faucets, pressure reducing valves
Question:
Identify four water-saving habits homeowners should adopt?
Answer:
don't leave water running, full laundry and dishwasher loads, reduce/eliminate use of garbage
disposals, not using toilet for trash disposal
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:
The expected volume of wastewater (Q) in gal/day from an older (pre- 1990) three-bedroom mobile
home would be?
Answer:
300
Question:
Which of the following characteristics should a poured-in-place concrete septic tanks have??
Answer:
watertight, designed by PE, Structurally sound
Question:
The standard inlet and outlet devices in a septic tank should be?
Answer:
tees
Question:
Question:
List four water saving plumbing devices that can be used in a home.?
Answer:
low flow toilets, low flow shower head, low flow faucets, pressure reducing valves
Question:
Identify four water-saving habits homeowners should adopt?
Answer:
don't leave water running, full laundry and dishwasher loads, reduce/eliminate use of garbage
disposals, not using toilet for trash disposal
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:
The expected volume of wastewater (Q) in gal/day from an older (pre- 1990) three-bedroom mobile
home would be?
Answer:
300
Question:
Which of the following characteristics should a poured-in-place concrete septic tanks have??
Answer:
watertight, designed by PE, Structurally sound
Question:
The standard inlet and outlet devices in a septic tank should be?
Answer:
tees
Question:
