Alabama Wastewater Collection Grade 1 C Exam Questions With Correct Answers

Alabama Wastewater Collection Grade 1
C Exam Questions With Correct Answers

A |flow |of |60 |gph |is |equal |to?



| a. |1 |mgd

| b. |1mg/L

| c. |10 |gpm

| d. |1 |gpm |- |CORRECT |ANSWER✔✔-d. |1 |gpm |(60 |gph |/ |60 |min/hr |)



The |slope |of |a |sewer |is |measured |by



| a. |The |difference |from |the |crown |to |the |invert

| b. |The |difference |in |invert |elevations |over |the |length

| of |the |pipe

| c. |Using |the |diameter |of |the |pipe

|d. |Only |entering |the |manhole |- |CORRECT |ANSWER✔✔-b. |The |difference |in |invert |elevation |
over |the |length |

| of |the |pipe



An |air |gap |can |be |used |to



| a. |Clean |sewer |blockages |caused |by |grease

| b. |Let |air |into |manholes

,| c. |Prevent |backflow |of |wastewater |into |a |drinking

| water |supply

d. |Test |for |oxygen |deficiency |in |manholes |- |CORRECT |ANSWER✔✔-c. |Prevent |backflow |of |
|


wastewater |into |a |drinking |

| water |supply.



A |cross |connection |is



| a. |Cast |Iron |pipe |connected |to |concrete |pipe

| b. |Steel |pipe |connected |to |asbestos |pipe

| c. |Potable |(Drinkable) |water |pipe |connected |to |a |supply |

| of |questionable |origin

d. |Lateral |line |connected |to |an |interceptor |- |CORRECT |ANSWER✔✔-c. |Potable |(Drinkable) |
|


water |pipe |connected |to |a |

| supply |of |questionable |origin



Wastewater |carried |in |a |collection |system |may |come |from



| a. |Digester |supernatant

| b. |Exfiltration

| c. |Primary |settling |tank

| d. |Inflow |- |CORRECT |ANSWER✔✔-d. |Inflow



When |using |any |hydraulic |sewer |cleaning |method, |care |must |be |taken |by |the |operator



| a. |To |always |plug |the |downstream |manhole

| b. |Not |to |cause |flooding |in |homes |and |businesses

,| c. |To |prevent |any |sir |gap |from |occurring

| d. |To |throttle |flows |from |the |hydrants |by |using |

|the |hydrant |valve |only |- |CORRECT |ANSWER✔✔-b. |Not |to |cause |flooding |in |homes |and |
businesses



Disease |producing |bacteria |are |called



| a. |Saprophytic

| b. |Facultative

| c. |Pathogenic

| d. |Parasitic |- |CORRECT |ANSWER✔✔-c. |Pathogenic



A |manhole |with |a |center |grating |is |normally |used |for



| a. |Venting

| b. |Storm |sewers

| c. |Sanitary |sewers

| d. |None |of |the |above |- |CORRECT |ANSWER✔✔-b. |Storm |sewers



A |pig |would |be |used |as |________________in |a |force |

main.



| a. |A |reamer

| b. |A |stopper

| c. |A |Float

| d. |A |tell |tale |- |CORRECT |ANSWER✔✔-a. |A |reamer

, A |minimum |scouring |velocity |of |2 |ft/sec |in |sewers |is |

| necessary |so |that



| a. |Flow |velocities |can |be |estimated |between |manholes

| b. |Roots |won't |grow |in |sewers

| c. |Sewer |pipes |won't |become |eroded |on |the |bottom

| d. |Solids |won't |build |up |in |a |sewer |and |

|reduce |flow |capacity |- |CORRECT |ANSWER✔✔-d. |Solids |won't |build |up |in |a |sewer |and |reduce |
flow |capacity



A |cross |connection |is |best |defined |as |



| a. |Ground |water |entering |a |gravity |sewer |through

| cracks |in |the |piping

| b. |A |lateral |line |connected |to |the |main |illegally

| c. |Storm |drainage |piped |into |a |domestic |

| collection |system

| d. |A |potable |water |supply |connected |to |a |potential |source |

| of |pollution. |- |CORRECT |ANSWER✔✔-d. |A |potable |water |supply |connected |to |a |potential |

| source |of |pollution.



When |dealing |with |collection |systems, |I |& |I |refers |to



| a. |Inflow |and |inspection

| b. |inspection |and |information