From: "Saved by Windows Internet Explorer 7" Subject: IOWPA Certification Study Questions Date: Mon, 27 Oct 2008 18:35:59 -0500 MIME-Version: 1.0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Location: http://cobweb.ecn.purdue.edu/~epados/IOWPA/IOWPA.htm X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 IOWPA Certification Study Questions

IOWPA Certification Practice = Questions*

A. General:

1. While it may improve the operation of a marginal septic system to = divert=20 water from water softeners and laundry to the nearest road ditch, it is = not=20 normally permitted in Indiana?

a. True=20
b. = False

Correct Answer

2. Why should the tank be cleaned when installing a replacement = system?

a. For=20 health reasons
b. It=20 should not be pumped
c. To check the baffles & remove solids
d. So the new = system starts=20 fresh

Correct Answer

3. What paperwork should be on site during the installation of a = septic=20 system?

a.=20 Installers' license, permit, requirement guidelines
b. Permit, = drawing, and state=20 requirement guidelines
c. Installers' license, permit, drawing and copy of = state=20 onsite rule
d.=20 Whatever the local county health department requires

Correct Answer

4. Which one of the following items is not required = on a=20 site drawing:

a. The=20 location of all soil borings
b. Nearest public building
c. A pool
d. Floodplain elevations, if located near a river or = creek=20
e. = Any drainage or=20 utility easements
f.=20 A barn
g. All of=20 these items must be included on drawing

Correct Answer

5. What is the definition of Residential Sewage Disposal System = failure?

a. The=20 soil surface has ponding of water.
b. The system will not accept sewage at the = designed=20 rate.
c. There is=20 contamination of potable water supply, ground water, or surface = water.=20
d. = All of the above.=20

Correct Answer


  Score:

Out of 5 

B. Sewage Source:

6. Residential sewage disposal systems may be used for the disposal = of water=20 from roof gutter downspouts.

a. True=20
b. = False

Correct Answer

7. Residential sewage disposal systems may be used for the disposal = of water=20 from foundation drains provided that the absorption field is = appropriately=20 sized.

a. True=20
b. False

Correct Answer

8. A jetted bathtub is treated as an additional bedroom or bedroom = equivalent=20 for system sizing requirements if its capacity is greater than:

a. 75=20 gallons
b. 100=20 gallons
c. 110=20 gallons
d. 125=20 gallons

Correct Answer

9. Residential septic systems should not be used for the disposal of = backwash=20 from water softeners.

a.=20 True
b. False

Correct Answer


  Score:

Out of 4 

C. Site Preparation/Pre-construction/Siting Issues:

10. How far away must a residential septic system be located from a=20 residential water well, if the soil loading rate is less than or equal = to 0.75=20 gal/sq ft per day?

a. 10=20 feet
b. 50=20 feet
c. 100=20 feet
d. 200 feet 		Correct = Answer

11. How close can any part of a septic system be located to a lake,=20 reservoir, or pond?

a. 50=20 feet
b. 100=20 feet
c. 200=20 feet
d. 25 feet=20 		Correct = Answer

12. What is the minimum distance that a residential = soil=20 absorption system (with a soil load rate less than 0.75 gal/sq ft per = day) must=20 be located away from a public water supply well?.

a. 50=20 feet
b. 100=20 feet
c. 200=20 feet
d. 300 feet=20

Correct Answer

13. The bottom of an absorption field trench shall not be installed = below the=20 elevation of the 100-year flood plain.

a.=20 True
b. False=20

Correct Answer

14. The 50-foot separation distance between a well and a septic = system is not=20 required for a well that is used for agricultural purposes only.

a.=20 True
b. False=20

Correct Answer

15. If the slope of the site of the absorption field exceeds 1%, the=20 subsurface drain shall be constructed only on the upslope side of the = field.=20

a.=20 True
b. False=20

Correct Answer

16. A septic tank cannot be installed in an area where the slope is = greater=20 than:

a.=20 6%
b. 10%=20
c. 25%=20
d. Not specified=20 in rule

Correct Answer

17. The separation distance between the house and the septic tank = must be at=20 least 5 feet.

a.=20 True
b. False=20

Correct Answer

18. A residential sewage disposal system and its associated drainage = area=20 cannot be constructed on adjoining property unless easements which grant = permission for construction and maintenance have been obtained from the=20 adjoining owner.

a.=20 True
b. False=20

Correct Answer

19. The maximum site slope permitted for = construction of a=20 subsurface soil absorption system is:

a.=20 10%
b. 12%=20
c. 15%=20
d. 20%

Correct Answer

20. How close can an absorption field be to a stream, a ditch, or = drainage=20 tile?

a. 10=20 feet
b. 25 feet=20
c. 50 feet=20
d. 100 feet

Correct Answer

21. Excessive smearing of the bottom and side walls of the absorption = trenches is grounds for rejection of the system and/or site.

a.=20 True
b. False=20

Correct Answer

22. The minimum separation distance from a soil = absorption=20 system (with a soil loading rate less than 0.75 gal/sq ft per day) to a = public=20 water supply reservoir is?.

a.=20 50 feet
b. 100=20 feet
c. 150=20 feet
d. 200=20 feet

Correct Answer

23. If a restrictive layer is located 51 inches below the ground = surface, for=20 new construction, what is the maximum depth to the = bottom of=20 the trench allowed for a 3-bedroom gravity system (not flood dose system = with=20 pump)?

a. 51 inches
b. 21 inches
c. 27 inches
d. 18 inches

Correct Answer

24. The soil scientist has stated there is a seasonal water table = located at=20 30 inches. You are going to place the trenches at a = maximum=20 depth of 15 inches. Which of the following is true?

=20 a. The water table is not important in this case.
b. The = water table is=20 below the trenches so no drain is required.
c. Not possible to = install a septic=20 system at this site.
d. Perimeter subsurface drainage is required. =

Correct Answer

25. A property owner (or his/her agent) who wishes to construct of a=20 new residential sewage disposal system must obtain a = written=20 permit signed by the local county Health Officer prior to:

a. Construction of a new home or placement of a = mobile=20 home
b.=20 Replacement of an existing residential sewage disposal system =
c. = Repair or expansion=20 of an existing residential sewage disposal system
d. All = of the above.

Correct Answer

26. A written permit signed by the Health Office is not required when = replacing an existing septic system or constructing a = Sanitary=20 Privy.

a.=20 True
b. False=20

Correct Answer

27. What is the minimum distance that a septic tank = must be=20 from an in-ground swimming pool, or other structure?

a. 5 feet
b. 10 feet
c. 25 feet
d. 50 feet

Correct Answer

28. What is the minimum separation distance required = for a=20 structure located downslope of an absorption system in = a 0.3=20 gal/sq ft per day load rate soil?

a. 30 feet
b. 50 feet
c. 75 feet
d. 100 feet

Correct Answer

29. What is the minimum distance that a structure = must be=20 located upslope from an absorption system in a 0.5 gal/sq ft per day = load rate=20 soil?

=20 a. 10 feet
b.=20 20 feet
c.=20 30 feet
d.=20 40 feet
e.=20 50 feet

Correct Answer

30. Before any construction may begin on rplacing a residential soil=20 absorption system, the following must be obtained:

a.=20 Soils report
b.=20 Septic permit
c.=20 Guidelines for construction
d. All of the above

Correct Answer

31. If the ground surface falls 12 feet in 100 feet, the slope is = 12%.

a.=20 True
b. False=20

Correct Answer

32. If the ground falls 3 inches in 25 feet, the slope is 12%.

a.=20 True
b. False=20

Correct Answer

33. Trees located within the construction site for a soil absorption = system:=20

=20 a. Must be cut off at the ground level and the stumps left in = place=20
b. Must be=20 left standing
c. Roots must be removed using a backhoe

Correct Answer

34. What must be done to prepare the basal area of an elevated mound = system=20 prior to placement of the sand?

a. Disk it
b. Rototill it
c. Plow with a = chisel or=20 moldboard plow
d. Nothing need to be done

Correct Answer

35. The moisture content of the soil has nothing to do with whether = or not a=20 site may be prepped for placement of the sand on an elevated mound site. =

a. True
b. False

Correct Answer

36. Excessive vegetation at the site where an elevated sand mound = will be=20 constructed:

a. Is not a problem
b. Must be cut and = removed=20
c. Must=20 be plowed under using a moldboard plow
d. Must be hand = pulled before=20 construction of the mound begins

Correct Answer

37. Before construction of an absorption system, on a rocky site: =

a. Remove the larger rocks and till to 4 = to 7=20 inches
b. Look for an alternative = site
c. Remove the=20 rocks and add at least 12 inches fill
d. The rocks should not be a = problem

Correct Answer

38. Trenches may be run up and down a slope on the site if:

a. Enough fill is placed on the site so = slope is=20 less than 12%
b. Trench bottoms must NOT have a = slope
c. The area is=20 first plowed to a depth of 8 inches
d. Trenches are made = narrower

Correct Answer


  Score:

Out of 29 

D. Septic Tanks/Dosing Tanks:

39. Are access risers required when a septic tank is installed?

a. Yes
b. No

Correct Answer

40. Do tank access risers have to be installed when tanks are pumped = or=20 systems repaired?

a. Yes
b. No

Correct Answer

41. What is the minimum septic tank capacity = required for a=20 3-bedroom home?

a. 1000 gallons
b. 750 gallons
c. 1250 gallons =
d. = 2000 gallons

Correct Answer

42. What is the required septic tank capacity for a 4-bedroom home? =

a.=20 1000 gallons
b. 750 gallons
c. 1250 gallons
d. 2000 gallons

Correct Answer

43. Are access risers required for a residential dosing tank?

a. Yes
b. No

Correct Answer

44. The required liquid holding capacity volume in a dosing tank may = not be=20 used to downsize the septic tank.

a. True
b. False

Correct Answer

45. Dosing tanks may be constructed of which of the following = materials:

a. Steel
b. Vitrified clay
c. Concrete=20
d.=20 Pressure treated lumber

Correct Answer

46. The liquid capacity of a dosing tank (pump chamber) must include: = 1) the=20 design dose volume, 2) an additional volume for liquid that will drain = back from=20 the dose pipe when pumping ceases, 3) additional capacity needed to keep = the=20 pump submerged at all times and 4) provide sufficient freeboard for a = high water=20 alarm.

a. True
b. False

Correct Answer

47. What is the minimum liquid level in a dosing = tank (pump=20 chamber) for a flood dose trench system for a 4-bedroom home?

a. High enough to cover the = pump
b. At least 12=20 inches
=20 c. High enough to cover the pump
d. No requirement

Correct Answer

48. What is the minimum distance that a dosing tank = must be=20 from a dwelling, inground swimming pool, or other structure?

a. 5 feet
b. 10 feet
c. 25 feet =
d. 50 feet

Correct Answer


  Score:

Out of 10 

E. Sewer Pipe (from house to the tank):

49. What is the minimum allowed diameter for a = residential=20 sewer pipe?

a. 1.5
b. 2 inches
c. 4 inches
d. 6 inches

Correct Answer

50. Corregated pipe can be used as a residential sewer pipe if it is=20 perforated.

a. True
b. False

Correct Answer

51. The minimum depth from original grade for a = residential=20 sewer (from the house to the tank) must be at least: =

a. 2 feet
b. 3 feet
c. 4 feet
d. Not specified in rule

Correct Answer

52. A 6-inch diameter pipe used as a residential sewer must be = installed with=20 a positive slope of at least:

a. 1=20 inch per 25 feet
b. 2 inches per 25 feet
c. 4 inches per 25 feet
d. 4 inches per 40 feet

Correct Answer

53. A 4-inch diameter pipe used as a residential sewer must be = installed with=20 a positive slope (downslope) of not more than:

a.=20 12 inches per 25 feet
b. 24 inches per 25 feet
c. 30 inches per 25 feet =
d. 36 = inches per 25 feet=20

Correct Answer

54. Which of the following types of pipe can be placed in subsurface = trench=20 laterals?

a.=20 ASTM-D 2728
b.=20 Schedule 40 non-perf
c. SDR 35 non-perf
d. ASTM-F 811
e. ASTM-D 2729-89 or ASTM-F 810-85

Correct Answer

55. What is the maximum amount of fall allowed over = the=20 length of an absorption trench for a perforated distribution pipe?

a. 1 inch
b. 4 inches
c. 3/4 inches
d. None

Correct Answer

56. What is the minimum slope allowed in a 4-inch=20 residential sewer pipe?

a.=20 1 inch fall in 10 feet
b. 4 inches fall in 25 feet
c. 1 inch fall per foot =
d. 36 = inches fall in 25=20 feet

Correct Answer

57. A horizontal separation distance must be maintained between a = pressure=20 water supply pipe and a sewer pipe of at least?

a.=20 3 feet
b. 5=20 feet
c. 10=20 feet
d. 25=20 feet

Correct Answer


  Score:

Out of 9 

F. Distribution Boxes:

58. What is the maximum acceptable interior width = for a=20 distribution box?

a.=20 12 inches
b. 24=20 inches
c. 36=20 inches
d. Not=20 specified in rule

Correct Answer

59. The first ten feet of effluent sewer leaving the D-box for the = absorption=20 field must be unperforated and placed in a gravel backfill.

a. True
b. False 		Correct = Answer

60. All absorption field trenches served by a common distribution box = must be=20 constructed so that each square foot of absorptive area is loaded with = an equal=20 amount of effluent.

a. True
b. False

Correct Answer

61. Each soil absorption trench must be connected to the distribution = box=20 individually.

a.=20 True
b. False=20

Correct Answer

62. Distribution boxes must be designed to split the effluent equally = among=20 the effluent ports and, therefore, the box outlets to the trenches shall = be at=20 the same elevations.

a.=20 True
b. False

Correct Answer

63. What is the maximum distance that the inlet = baffle or=20 90-degree elbow in the distribution box must be above the bottom of the=20 distribution box?

a.=20 1 inch
b. 1.5=20 inches
c. 2=20 inches
d. 2.4=20 inches

Correct Answer

64. Can the distribution box be leveled by placing aggregate = underneath it?=20

a.=20 Yes
b. No

Correct Answer

65. In a flood-dosed absorption system, the end of the inlet pipe in = the=20 distribution box must be fitted with a:

a. 90 degree elbow or baffle
b. 45 degree=20 elbow or baffle
c. 22.5 degree elbow or baffle
d. Nothing

Correct Answer


  Score:

Out of 8 

G. Construction of Absorption Systems

66. If there are no limiting conditions, what is the = maximum=20 trench depth allowed for the replacement of an existing = residential sewage disposal system?

a. 36 inches
b. 40 inches
c. 48 inches
d. 50 inches

Correct Answer

67. The cover material over the aggregate in an absorption trench = must be=20 sufficiently wide to protect the aggregate from the soil upon = backfilling and=20 final cover of the absorption field.

a.=20 True
b. False=20

Correct Answer

68. The final soil cover over the absorption field shall be graded so = that=20 the area is crowned to shed water.

a.=20 True
b. False=20

Correct Answer

69. Perforated pipe distribution lines in the absorption = trench of=20 a subsurface soil absorption system must be completely surrounded by = aggregate.=20 What is the minimum amount of aggregate that is placed = below=20 the pipe across the entire trench?

a.=20 2 inches
b. 4=20 inches
c. 6=20 inches
d. 8=20 inches

Correct Answer

70. What is the minimum amount of aggregate that can = be=20 placed above the pipe and across the entire trench?

a. 2 inches
b. 4 inches
c. 6 inches
d. 8 inches

Correct Answer

71. Laterals fed by the same distribution box in the absorption field = can be=20 unequal lengths.

a. True
b. False

Correct Answer

72. A gravity flow residential septic system shall not be installed = if the=20 total amount of absorption trench exceeds the following:

a.=20 300 lineal feet
b. 400 lineal feet
c. 500 lineal feet
d. None of the above

Correct Answer

73. What is the maximum trench depth in the soil = absorption=20 field on a new construction site?

a. 24=20 inches
b. 30=20 inches
c. 36=20 inches
d. 48=20 inches

Correct Answer

74. What is the minimum depth from original grade of = any=20 gravity-feed, trickle flow trench?

a.=20 36 inches
b. 24=20 inches
c. 16=20 inches
d. 10=20 inches

Correct Answer

75. What is the minimum width of any trench in the = soil=20 absorption field?

a.=20 12 inches
b. 18=20 inches
c. 24=20 inches
d. 8=20 inches

Correct Answer

76. What is the maximum width of any trench in the = soil=20 absorption field?

a. 12 inches
b. 18 inches
c. 24 inches
d. 36 inches

Correct Answer

77. What is the maximum length of any trench in a=20 gravity-fed soil absorption field?

a.=20 75 feet
b. 100=20 feet
c. 125=20 feet
d. 150=20 feet

Correct Answer

78. What is the minimum amount of soil cover that = must be=20 placed over the aggregate in a trench?

a.=20 10 inches
b.=20 12 inches
c.=20 15 inches
d.=20 18 inches

Correct Answer

79. What is the minimum length of=20 non-perforated pipe that must extend away from the = distribution=20 box?

a.=20 10 feet
b. 5=20 feet
c. 15 feet=20
d. 3 feet

Correct Answer

80. The minimum distance between absorption = trenches, center=20 to center, for new construction is:

a. 5 feet
b. 8 feet
c. 10 feet
d. 7.5 feet

Correct Answer

81. When an absorption system must be placed on a sloping site, the = trenches=20 must be oriented as follows:

a.=20 Perpendicular to the slope (along the contour)
b. Parallel to (along) = the slope=20

Correct Answer

82. What type of the following barrier material can be placed over = the gravel=20 before backfilling a trench with soil?

a.=20 Recycled cardboard
b. Tar paper
c. None
d. Geotextile

Correct Answer

83. On a site with a steep slope, the bottom of each trench must be = no more=20 than the following distance below the bottom of the previous trench: =

a.=20 All trenches must be at same elevation
b. 6 inches
c. 12 inches
d. Not specified in rule =

Correct Answer

84. How many hours notice must a County Health Department be given in = order=20 for them to inspect a repaired, replaced, or newly-installed septic = system?

a. 2 hours
b. 24 hours
c. 12 hours
d. 48 hours

Correct Answer

85. Must the aggregate for the absorption system be free of fines = before it=20 can be placed in absorption trenches?

a. Yes
b. No

Correct Answer

86. The size of the aggregate used in trenches must be:

a. Larger than the holes in the perforated = laterals.=20
b. No=20 smaller than 1/2 inch in diameter and no larger than 2 and 1/2 = inches in=20 diameter.
c. Both a. and b.
d. None of the above

Correct Answer

87. The best reason for not installing septic systems during periods = of wet=20 weather when the ground is muddy is because...

a. Your equipment will sink into the ground and = you will=20 not be able to finish the system.
b. The septic tank might float. =
c. = Excessive smearing=20 of the usable absorption trench sidewalls and bottom during = construction=20 can result in irreversible damage to the soil infiltrative = surface. Also,=20 wet weather can create a condition in which severe compaction can = occur on=20 the site.

Correct Answer

88. What is the minimum inside width for a = distribution box?=20

a. 8 inches
b. 12 inches
c. 15 inches
d. 24 inches

Correct Answer

89. When preparing the site to construct a sand mound, you must:

a. Use a moldboard or chisel plow =
b. Plow so that=20 the soil is thrown up slope
c. Plow when the soil passes the plasticity = test=20
d. Plow=20 7 to 8 inches into the existing soil
e. All of the above

Correct Answer

90. The maximum site slope allowed for a sand mound=20 installation is:

a. 15%
b. 10%
c. 6%
d. 2%

Correct Answer

91. Trenches in a subsurface gravity soil absorption system may be = manifolded=20 at the distal end of the trench to obtain additional absorption area. =

a. True
b. False

Correct Answer


  Score:

Out of 25 

H. Perimeter Drains

92. When a subsurface perimeter drain is required for a septic = system, how=20 far below the center of the absorption field does it have to lower the = seasonal=20 high water table?

a. 10 inches
b. 15 inches
c. 24 inches
d. 36 inches

Correct Answer

93. Perimeter drains that outlet to the surface require:

a. Vents
b. Rodent guards
c. Cleanouts
d. Caps so water discharge is = prevented

Correct Answer

94. Subsurface perimeter drains installed upslope of an absorption = system=20 must be backfilled with aggregate to at least 6 inches of the surface. =

a. True
b. False

Correct Answer

95. The perimeter drain must be at least 3 inches in diameter, unless = a=20 suitable outlet cannot be found.

a. True
b. False

Correct Answer

96. If the seasonal high water is perched, the perimeter drain around = the=20 absorption field must be constructed 2 inches into the glacial till or = fragipan.=20  

a. True
b. False

Correct Answer

97. Upslope drains shall be backfilled with aggregate to:

a.=20 The surface
b.=20 Within 6 inches of the surface
c. within 18 inches of the surface =
d. Enough = aggregate to cover=20 the pipe

Correct Answer

98. If a subsurface perimeter drain tile is needed for a residential = system,=20 it may be located within a drainage way.

a.True
b.False

Correct Answer

99. What is the minimum slope for the subsurface = perimeter=20 drain?

a.=20 4 inches in 25 feet
b. 1 inches in 100 feet
c. 2 inches in 100 feet =
d. 2.4 = inches in 100 feet=20

Correct Answer

100. For the new construction, can a pump or siphon be installed in a = perimeter drain to help the movement of water through the drain?

a. Yes
b. No

Correct Answer

101. What is the minimum distance that the perimeter = drain=20 must located away from the absorption treches, if the soil loading rate = is less=20 than or equal to 0.6 gal/sq ft per day?

a. 10 feet
b. 5 feet
c. 12 feet
d. 24 feet=20

Correct Answer

102. At a site where a perimeter drain is needed, What is the amount = of slope=20 that must be exceeded before the site is considered to be sloping rather = than=20 flat?

a.=20 0.5%
b. 2%=20
c. 6%=20
d. 15%

Correct Answer

103. A perimeter drain may be installed closer than 10 feet to an = elevated=20 sand mound as long as it is on the upslope side.

a. True
b. False

Correct Answer


  Score:

Out of 12 

I. Pretreatment Systems:

104. Can a septic system with a pre-treatment unit discharge effluent = into a=20 stream, ditch, or to the soil surface?

a. Yes
b. No

Correct Answer

105. Is it true that a recirculation sand filter cannot discharge to = a=20 flowing stream after disinfection?

a. Yes
b. No

Correct Answer


  Score:

Out of 2 

J. Pressure Distribution:

106. All burrs must be removed from the holes in the pressure = distribution=20 laterals.

a. True
b. False

Correct Answer

107. What is the minimum inside diameter of the = delivery=20 pipe in a flood dose system?

a. 1/2 inch
b. 3/4 inch
c. 1 inch
d. 2 feet

Correct Answer

108. How far is the first hole on a pressure distribution lateral in = an=20 elevated sand mound placed from the manifold in a center feed system? =

a. 12 inches
b. 18 inches
c. 24 inches
d. 36 inches

Correct Answer

109. What is the required lateral spacing (center to center) for the = pressure=20 distribution laterals in an elevated mound system?

a. 6 to 12 inches
b. 10 to 18 inches =
c. 24 to 36 inches=20
d. 30=20 to 40 inches
e. 40 to 48 inches

Correct Answer

110. In an elevated sand mound system the delivery line must drain = back to=20 the dosing tank.

a. True
b. False

Correct Answer

111. What is the maximum length of a delivery line = in an=20 elevated mound system?

a. No limit
b. 50 feet
c. 200 feet =
d. 500 feet=20
e.=20 Not specified in rule

Correct Answer

112. What is the allowable inside diameter of the delivery line in a=20 residential elevated mound system?

a. 1-3 inches
b. 2-4 inches
c. 3-6 inches =
= d. 4-8=20 inches
e.=20 None of the above

Correct Answer

113. The holes in the pressure distribution laterals in an elevated = mound=20 system should be placed facing:

a. Up
b. Down
c. Sideways
d. Any of the = above
e. None of the=20 above

Correct Answer

114. The minimum diameter of a pressure delivery = pipe in a=20 mound is:

a. 1 inch
b. 2 inches
c. 3 inches =
d. 4 inches

Correct Answer

115. The maximum inside diameter of a pressure = delivery pipe=20 in a mound is:

a. 2 inches
b. 3 inches
c. 4 inches
d. = 6 inches

Correct Answer

116. The delivery line for a sand mound must be installed:

a. Prior to plowing the site
b. After the sand=20 is added to the site
c. Whenever possible except during wet = conditions=20
d. By=20 hand digging into the mound area

Correct Answer

117.A sand mound pressure distribution = network must=20 be sized, and its controls set to deliver, the following:

a. 1 dose per day
b. 2 doses per day =
c. 3 doses per day=20
d. 4=20 doses per day

Correct Answer

118. What is the minimum inside diameter pressure=20 distribution lateral for a sand mound?

a. 1/2 inch
b. 1 inch
c. 2 inch
d. 1 1/2 inch

Correct Answer

119. What is the maximum inside diameter pressure=20 distribution lateral size for a sand mound?

a. 2 inches
b. 3 inches
c. 4 inches =
d. 2 1/2 inches=20

Correct Answer

120. What is the maximum pipe hole size in a = pressure trench=20 or sand mound?

a. 1/8 inch
b. 3/4 inch
c. 1/4 inch =
d. 5/8 inch

Correct Answer

121. The outlets holes in a pressure distribution lateral in an = elevated sand=20 mound:

a. must be facing to the side
b. are always 1/4=20 inches diameter
c. must be free of burrs
d. b. & c. =

Correct Answer

122. Hole spacing along the pressure distribution laterals for = elevated sand=20 mounds should be:

a. 18 inches
b. 24 inches
c. 30 inches =
d. 36 inches

Correct Answer

123. The pressure distribution laterals should be sloped 0.5% to the = distal=20 end of the pipe..

a. True
b. False

Correct Answer

124. The delivery line from the pressure dosing tank to the = distribution box=20 in a flood-dose system must drain between doses.

a. True
b. False

Correct Answer

125. A distribution box is required on a flood dose system.

a. True
b. False

Correct Answer

126. A 3 bedroom flood dose system must be able to dose 450 gallons = per day.=20

a. True
b. False

Correct Answer

127. A flood dose system for a 3 bedroom home requires a pump = discharge rate=20 of:

a. 30-45 gallons per minute
b. 30-60 gallons=20 per minute
c. 38-75 gallons per minute
d. 45-90 gallons=20 per minute

Correct Answer

128. The total dynamic head required for a flood dose system is be = the=20 elevation difference in feet between the pump off level and the d-box = plus the=20 friction in the delivery pipe (expressed in feet of pressure head) and = any=20 pressure head, in feet, needed at the discharge point.

a. True
b. False

Correct Answer

129. The delivery line on a pressure distribution system must drain = after=20 use.

a. True
b. False

Correct Answer

130. The minimum inside diameter of a flood-dosed = delivery=20 pipe of a residential system is:

a. 1 inch
b. 2 inch

Correct Answer

131. The maximum inside diameter for a flood-dosed = delivery=20 pipe in a residential system is:

a. 4 inches
b. 6 inches

Correct Answer

132. Each pipe in a subsurface pressure distribution system is = connected to=20 the manifold and is counted as a separate distribution line.

a. True
b. False

Correct Answer

133. Trenches in a subsurface pressure distribution system shall not = be=20 manifolded together at the distal end of the trench.

a. True
b. false

Correct Answer

134. The distal ends of pipes in a pressure distribution system must = be=20 capped.

a. True
b. False

Correct Answer

135. What is the minimum diameter for a manifold = pipe in a=20 pressure distribution system?

a. 1.5 inches
b. 2 inches =
c. 4 inches=20
d. 6=20 inches

Correct Answer


  Score:

Out of 30 

K. Pumps and Controls:

136. All pump controls, including liquid level sensors, must be:

a.=20 Completely within the dosing chamber
b. Located entirely outside the dosing = chamber=20
c. Designed and=20 installed so that they can be serviced
d. In the home so that = alarms will be=20 noticed

Correct Answer

137. Effluent pumps must be:

a.=20 Completely submerged at all times
b. Sized to deliver the total design = flow rate=20 while meeting the total dynamic head requirements
c. = Designed and installed=20 so that they can be serviced easily
d. All of the above

Correct Answer

138. When selecting an effluent pump, there are three main values = that must=20 to be determined:

a.=20 Design head, static head, friction loss head
b. Area, soil loading = rate, slope=20
c. Diameter of=20 pipe, length of pipe, number of fittings, soil type
d. = Number of holes in=20 laterals, length of laterals, daily wastewater volume

Correct Answer

139. How is static head calculated for a flood dose system?

a. Using the pump curve provided by the = manufacturer=20
b. Using the=20 length and size of the force main
c. Subtract the elevation of the off = float from=20 the invert elevation of the distribution box
d. Static head is not = important for=20 onsite septic systems

Correct Answer

140. The pump and high water alarm must be wired on separate = circuits.

a. True
b. False

Correct Answer

141. The total head required when selecting a pump for an elevated = mound=20 system includes what components?

a. Lift from pump off to highest point in = manifold=20
b.=20 Friction loss in delivery line
c. System design head =
d. All of the=20 above

Correct Answer

142. The system design head in an elevated mound system must be:

a. 1 foot
b. 2 feet
c. 2.5 feet =
d. 3 feet=20
e.=20 2.5 - 3 feet

Correct Answer

143. What is the required dosing volume for a residential elevated = mound=20 systems?

a. The design daily flow
b. The design daily = flow plus or=20 minus the volume from the delivery line
c. 1/4 the design = daily flow=20
d. 1/4=20 the design daily flow plus or minus the volume from the delivery = line

Correct Answer

144. The pump for an elevated mound system must be equipped with a = high water=20 alarm.

a. True
b. False

Correct Answer

145. When a high water alarm is installed in a dosing tank, it must = be:

a. Audio
b. Visual
c. Digital
d. Audio/visual

Correct Answer

146. Which of the situations listed below requires that the = residential=20 sewage disposal system be pump-assisted.

a. When the system is to be installed in a = floodplain.
b. When there is no aggregate available. =
c. When the total=20 lineal footage required for the absorption system trenches exceeds = 500=20 feet.
d. When there is no outlet for a perimeter = drain.=20

Correct Answer

147. Only liquid level sensors can be located within the dosing tank. =

a. True
b. False

Correct Answer

148. Each dosing tank shall be fitted/equipped with a high water, and = audio=20 and visual alarm and be wired on a separate circuit from the pump.

a. True
b. False

Correct Answer

149. In a dosing tank, what must the effluent pump be fitted with? =

a. Rope & chain
b. Break away = flanges &=20 lifting chain
c. Chain & weep hole
d. Weep hole=20 & break away flange

Correct Answer


  Score:

Out of 14 

L. Elevated Sand Mounds:

150. The final ground surface of an elevated sand mound must be = designed and=20 constructed to maintain a minimum of the following = slope on all=20 sides:

a.=20 1:1
b. 2:1=20
c. 3:1=20
d. 4:1

Correct Answer

151. A minimum of 12 inches of soil cover is = required over=20 the elevated mound system.

a. True
b. False

Correct Answer

152. The final soil cover for an elevated mound system may consist = of:

a. 12 in of muck
b. 6 in of mulch and 6 in of marl =
c. 12 = in of sawdust=20 mixed with sand
d. 6 in of clayey subsoil and 6 in of topsoil =

Correct Answer

153. The sand in an elevated sand mound is installed at a=20 maximum slope of:

a. 2:1
b. 3:1
c. 4:1
d. 5:1

Correct Answer

154. It is acceptable to use pit run material as the filter media in = an=20 elevated sand mound.

a.=20 True
b. False=20

Correct Answer

155. The aggregate bed must be installed level within the elevated = mound=20 system.

a. True
b. False

Correct Answer

156. What is the required downslope dispersal area for an elevated = mound=20 system on a site with a 0.7% slope and a design loading rate of 0.25 = gal/sq ft=20 per day?

a. 25 feet
b. 30 feet
c. 50 feet
d. 100 feet

Correct Answer

157. What is the required downslope dispersal area for an elevated = mound=20 system on a site with 1.2% slope and a loading rate of 0.6 gal/sq ft per = day?=20

a. 25 feet
b. 30 feet
c. 50 feet
d. 100 feet

Correct Answer

158. When plowing the site to prepare the basal area for an elevated = mound=20 system, one should plow along (parallel to) the contour.

a. True
b. False

Correct Answer

159. When using a moldboard plow to prepare the basal area for an = elevated=20 sand mound at least a two bottom plow is required.

a. True
b. False

Correct Answer

160. The delivery line for a mound must be installed in the basal = area under=20 the mound prior to plowing.

a. True
b. False

Correct Answer

161. The maximum width of the aggregated bed in an = elevated=20 mound system is 12 feet.

a. True
b. False

Correct Answer

162. What is the required depth of plowing when preparing the basal = area of=20 an elevated mound system?

a. 24 inches
b. 12 inches
c. 7-8 inches =
d. = 4 inches

Correct Answer

163. In mound systems: if the delivery line is installed below the = frost line=20 so is not required to drain between doses.

a. True
b. False

Correct Answer

164. A sand mound may be installed if there are no soil horizons = within the=20 following depth from the ground surface which have a loading rate of = less than=20 .25 gal/sq. ft. per day :

a. 48 inches
b. 36 inches
c. 20 inches =
d. 10 inches

Correct Answer

165. Minimum basal area required for a sand mound is = based=20 on:

a. number of bedrooms/bedroom equivalents =
b. soil loading=20 rate
c.=20 a. & b.
d. None of the above

Correct Answer

166. On a level site, the basal area of a mound is:

a. The area underneath the aggregate bed =
b. The area=20 within the perimeter drain
c. The entire sand area excluding the end = slope=20 areas
d. The entire ground area under the mound =

Correct Answer

167. What is the maximum width of the aggregate bed = in a=20 residential elevated mound system?

a. 20 feet
b. 10 feet
c. 15 feet =
d. 7.5 feet

Correct Answer

168. An elevated mound system should be constructed as long and = narrow as the=20 site allows.

a. True
b. False

Correct Answer

169. What is the amount of aggregate required beneath the pressure=20 distribution laterals in the bed of an elevated mound system?

a. 12 inches
b. 10 inches
c. 4 inches =
d. 6 inches

Correct Answer

170. What is the minimum slope that an elevated = mound system=20 can be installed on?

a. Not specified in rule
b. 0.5%=20
c.=20 2%
d. 3%

Correct Answer

171. What is the minimum allowable inside diameter = of the=20 pipe in the pressure distribution laterals in an elevated mound system? =

a. 1.0 inch
b. 1.5 inch
c. 2 inch =
d. 1.5 to 2=20 inches
e. all of the above

Correct Answer

172. Since the area of a mound is prepared prior to sand placement = there is=20 no need to be concerned about compaction from vehicular traffic in the = area of=20 the mound.

a. True
b. False

Correct Answer

173. The minimum required downslope dispersal area = downslope=20 of a mound, depending on soil conditions, is:

a. 100 feet
b. 75 feet
c. 66 feet =
d. 50 feet=20
e. 30=20 feet
f. 30 to 50 feet

Correct Answer

174. On a sloping site, the basal area of a mound is:

a. The sand area underneath and downslope = of the=20 aggregate bed.
b. The entire mound area downslope of the = aggregate=20 bed.
c. The entire mound area downslope of the = aggregate=20 bed and extending to the perimeter drain.
d. Only the sand = area underneath=20 the aggregate bed.

Correct Answer

175. Mounds:

a. Must be constructed so that the = longest axis is=20 located along the contour.
b. Should be as long and narrow as = possible for=20 the site.
c. Delivery lines must drain between = doses.=20
d.=20 All of the above.

Correct Answer

176. The delivery line from the dosing tank to the manifold in the = mound:=20

a. Can be installed from the upslope or = downslope=20 side
b. Can be intalled from the downslope = side only=20
c.=20 Can be installed from the end or the upslope side

Correct Answer

177. The sand for a mound must be placed on the plowed area:

a. Immediatly after plowing the site =
b. Anytime before=20 a rain event
c. Only after a rain
d. The sand must be = placed before=20 plowing

Correct Answer

178. What type of sand must be used in a sand mound:

a. Pit run
b. Spec 43
c. Clean sand =
d. Spec 23

Correct Answer

179. What is the minimum depth of sand under the = aggregate=20 bed in a mound?

a. 6 inches
b. 10 inches
c. 12 inches =
d. 20 inches

Correct Answer

180. What is the minimum width of the aggregate bed = in a=20 mound?

a. 3 feet
b. 4 feet
c. 5 feet =
d. 6 feet

Correct Answer

181. What is the maximum width of the aggregated bed = in a=20 mound?

a. 8 feet
b. 9 feet
c. 10 feet =
d. 11 feet

Correct Answer

182. What is the maximum amount of fall allowed in = the=20 aggregate bed in a mound?

a. 1 inch per 100 feet
b. 2 inches per 100 = feet
c. = 4 inches per 25=20 feet
d.=20 Must be level

Correct Answer

183. Spacing between adjacent laterals in an elevated sand mound must = be=20 between:

a. 18 inches and 24 inches
b. 18 inches=20 and 36 inches
c. 24 inches and 36 inches
d. 36 inches=20 and 48 inches

Correct Answer

184. What is the minimum depth of sand that must be = placed=20 under the aggregate bed in an elevated mound system?

a. 6 inches
b. 12 inches
c. 18 inches =
d. 24 inches

Correct Answer


  Score:

Out of 35 



  Overall Score:

 of a possible 184 points  

*Disclaimer
These study = questions are=20 provided for your convenience by the Indiana Onsite Wastewater = Professions=20 Association (IOWPA) and Purdue University to help you prepare for = IOWPA's=20 certification examination. It should not be used as a reference in place = of=20 Indiana' s current Rule 410 IAC 6-8.1 for the placement, design or = construction=20 of septic systems. The original questions was prepared by Greg Lake, = Kokomo,=20 Indiana, but have been modified for the web by Don Jones and Brad Lee at = Purdue=20 University with. programming assistance from Chell Nyquist. Please = forward=20 comments about how this study guide can be improved to jonesd@purdue.edu. No information = about the=20 user or their performance is collected during or kept after the online = test is=20 taken. It is intended soley for the benefit of the user.

Copyright by Purdue University 2005, Extension Publication number=20 ID-327.

Quiz Updated 01/14/2006