WASTEWATER C1 EXAM CH 5B-14 QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
what information should be included in a collection system inventory? - (ANSWER)Age of system,
condition of system, size of the system, type of the system
What are the considerations for selecting a nozzle? - (ANSWER)Objective of the operation, type of the
cleaning or stoppage, type of environment, type of traffic control
Which factors are common causes of odor problems in collection systems? - (ANSWER)High
temperatures; long transmission lines; low-velocity flows; poorly maintained collection system
Which serious problems are caused by hydrogen sulfide in collection systems? - (ANSWER)Corrosion and
possible collapse of sewers, structures, and equipment; flammable and explosive atmosphere under
certain circumstances; loss of capacity in the sewer;
Which safety precautions should be taken before and during a scooter operation? - (ANSWER)Allow time
for setting up and removing larger scooters when preparing work schedules; Always examine the
equipment cables before starting and when finishing cleaning each section to avoid having a cable break
when the scooter is in the middle of a sewer; Determine if a buildup of water in the working manhole
and in the sewer being cleaned will flood a residence or business; Examine the manhole structure to be
sure the sewer scooter can be installed.
What safety equipment is important for operating power bucket machines? - (ANSWER)Atmospheric
monitoring equipment; Barricades and traffic signs; flags and cones; Safety harness, lifeline, and tripod;
Self-contained breathing apparatus( SCBA)
High water velocities used by hydraulic sewer cleaning methods can effectively remove which items from
sewers? - (ANSWER)Grease; roots; sand.
What additional equipment is needed when working with scooters? - (ANSWER)A 1,000-2,000-gallon
tank truck; debris traps, control lines, and storage reel; roller cable guides; safety equipment; Upper and
lower manhole jacks.
,WASTEWATER C1 EXAM CH 5B-14 QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
What are the causes of stoppages in sewers? - (ANSWER)Broken pipe; debris; grease; joint failure; roots
Power rodders can be used for which purposes? - (ANSWER)Emergency clearing of stoppages; routine
preventive maintenance; scheduled clearing of grease deposits; scheduled clearing of roots; threading
cable for bucket machines.
Which items are basic rules of operation that should be observed when running rodding machines? -
(ANSWER)Be sure that forward pressure is adjusted to low levels to avoid bending or breaking the rod;
do not allow any bends or S-curves to remain in the guide hose; do not jam the rod into and obstruction;
do not rotate the rod in on position for an extended period; When torque builds up, retract the tool from
the material to relieve the torque and then return to the material.
Which of the following items are objectives of cleaning equipment maintenance? - (ANSWER)To increase
the efficiency and safety of maintenance operations; to prevent equipment failure on the job; to prolong
the life of the equipment.
Which maintenance tasks should be performed daily when operating a high-velocity cleaner? -
(ANSWER)Check the stacking of the rod on the reel; inspect the drive chains to the sprockets; inspect the
rod hose guides; inspect the tension of the drive head chain; tighten the rod couplings as necessary
Which maintenance tasks must be performed on a sectional rodder? - (ANSWER)check the stacking of
the rod on the reel; inspect the drive chains to the sprockets; inspect the rod hose guides; inspect the
tension of the drive head chain; tighten the rod couplings as necessary.
The material in a sewer is removed by what types of clearing actions caused by a mechanical cleaning
device or machine? - (ANSWER)cutting action; pulling action; pushing action; scraping action;
High-velocity cleaners are most effective at which tasks? - (ANSWER)Cleaning lines of silt, sand, sludge,
and other light debris; clearing roots; opening stoppages; removing light grease and detergents; washing
manholes and wet wells;
, WASTEWATER C1 EXAM CH 5B-14 QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
T or F: If the air test fails, one or both of the seals made by the plugs may be defective. - (ANSWER)True
T or F: Native backfill material is the material excavated from a sewer trench and is not the best choice
for use as backfill. - (ANSWER)False
T or F: Extreme care must be taken to protect underground utilities when you are excavating near them.
- (ANSWER)True
T or F: Sewer pipe must be laid by machine. - (ANSWER)False
T or F: Underground sewer repair work can be very dangerous. - (ANSWER)True
T or F: When preparing to repair underground sewers, all underground utilities should be located and
marked and some thought should be given to overhead utility conflicts. - (ANSWER)True
T or F: Spot liners and pipe bursting are two trenchless techniques used by collection system agencies to
replace failing sewer lines. - (ANSWER)True
T or F: Heavy equipment operators normally dig trenches from the high end to the low end(i.e, the
trench slopes away from the equipment) to stay on grade. - (ANSWER)False
T or F: A tee-shaped channel causes the flow to run directly into the main channel flow, called
deadheading. - (ANSWER)True
T or F: When laying large-diameter pipe, care must be used to provide uniform support under the entire
length of pipe. - (ANSWER)True
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
what information should be included in a collection system inventory? - (ANSWER)Age of system,
condition of system, size of the system, type of the system
What are the considerations for selecting a nozzle? - (ANSWER)Objective of the operation, type of the
cleaning or stoppage, type of environment, type of traffic control
Which factors are common causes of odor problems in collection systems? - (ANSWER)High
temperatures; long transmission lines; low-velocity flows; poorly maintained collection system
Which serious problems are caused by hydrogen sulfide in collection systems? - (ANSWER)Corrosion and
possible collapse of sewers, structures, and equipment; flammable and explosive atmosphere under
certain circumstances; loss of capacity in the sewer;
Which safety precautions should be taken before and during a scooter operation? - (ANSWER)Allow time
for setting up and removing larger scooters when preparing work schedules; Always examine the
equipment cables before starting and when finishing cleaning each section to avoid having a cable break
when the scooter is in the middle of a sewer; Determine if a buildup of water in the working manhole
and in the sewer being cleaned will flood a residence or business; Examine the manhole structure to be
sure the sewer scooter can be installed.
What safety equipment is important for operating power bucket machines? - (ANSWER)Atmospheric
monitoring equipment; Barricades and traffic signs; flags and cones; Safety harness, lifeline, and tripod;
Self-contained breathing apparatus( SCBA)
High water velocities used by hydraulic sewer cleaning methods can effectively remove which items from
sewers? - (ANSWER)Grease; roots; sand.
What additional equipment is needed when working with scooters? - (ANSWER)A 1,000-2,000-gallon
tank truck; debris traps, control lines, and storage reel; roller cable guides; safety equipment; Upper and
lower manhole jacks.
,WASTEWATER C1 EXAM CH 5B-14 QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
What are the causes of stoppages in sewers? - (ANSWER)Broken pipe; debris; grease; joint failure; roots
Power rodders can be used for which purposes? - (ANSWER)Emergency clearing of stoppages; routine
preventive maintenance; scheduled clearing of grease deposits; scheduled clearing of roots; threading
cable for bucket machines.
Which items are basic rules of operation that should be observed when running rodding machines? -
(ANSWER)Be sure that forward pressure is adjusted to low levels to avoid bending or breaking the rod;
do not allow any bends or S-curves to remain in the guide hose; do not jam the rod into and obstruction;
do not rotate the rod in on position for an extended period; When torque builds up, retract the tool from
the material to relieve the torque and then return to the material.
Which of the following items are objectives of cleaning equipment maintenance? - (ANSWER)To increase
the efficiency and safety of maintenance operations; to prevent equipment failure on the job; to prolong
the life of the equipment.
Which maintenance tasks should be performed daily when operating a high-velocity cleaner? -
(ANSWER)Check the stacking of the rod on the reel; inspect the drive chains to the sprockets; inspect the
rod hose guides; inspect the tension of the drive head chain; tighten the rod couplings as necessary
Which maintenance tasks must be performed on a sectional rodder? - (ANSWER)check the stacking of
the rod on the reel; inspect the drive chains to the sprockets; inspect the rod hose guides; inspect the
tension of the drive head chain; tighten the rod couplings as necessary.
The material in a sewer is removed by what types of clearing actions caused by a mechanical cleaning
device or machine? - (ANSWER)cutting action; pulling action; pushing action; scraping action;
High-velocity cleaners are most effective at which tasks? - (ANSWER)Cleaning lines of silt, sand, sludge,
and other light debris; clearing roots; opening stoppages; removing light grease and detergents; washing
manholes and wet wells;
, WASTEWATER C1 EXAM CH 5B-14 QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED!!! ALREADY GRADED A+ LATEAST
UPDATE!!!
T or F: If the air test fails, one or both of the seals made by the plugs may be defective. - (ANSWER)True
T or F: Native backfill material is the material excavated from a sewer trench and is not the best choice
for use as backfill. - (ANSWER)False
T or F: Extreme care must be taken to protect underground utilities when you are excavating near them.
- (ANSWER)True
T or F: Sewer pipe must be laid by machine. - (ANSWER)False
T or F: Underground sewer repair work can be very dangerous. - (ANSWER)True
T or F: When preparing to repair underground sewers, all underground utilities should be located and
marked and some thought should be given to overhead utility conflicts. - (ANSWER)True
T or F: Spot liners and pipe bursting are two trenchless techniques used by collection system agencies to
replace failing sewer lines. - (ANSWER)True
T or F: Heavy equipment operators normally dig trenches from the high end to the low end(i.e, the
trench slopes away from the equipment) to stay on grade. - (ANSWER)False
T or F: A tee-shaped channel causes the flow to run directly into the main channel flow, called
deadheading. - (ANSWER)True
T or F: When laying large-diameter pipe, care must be used to provide uniform support under the entire
length of pipe. - (ANSWER)True
