CWEA COLLECTION SYSTEMS MAINTENANCE GRADE 2
EXAM – COMPREHENSIVE ASSESSMENT - LATEST PRACTICE
QUESTIONS AND 100% VERIFIED CORRECT ANSWERS |
COMPLETE EXAM PREP TESTBANK | GUARANTEED PASS |
INSTANT DOWNLOAD PDF
EXAM OVERVIEW:
THIS COMPREHENSIVE 150-QUESTION MULTIPLE-CHOICE EXAMINATION IS DESIGNED TO REFLECT THE FULL SCOPE OF
THE CWEA COLLECTION SYSTEMS MAINTENANCE GRADE 2 CERTIFICATION. IT INCLUDES FOUNDATIONAL THEORY,
APPLIED FIELD KNOWLEDGE, TROUBLESHOOTING, SAFETY, REGULATORY COMPLIANCE, EQUIPMENT OPERATION,
MAINTENANCE PRACTICES, HYDRAULICS, MATH APPLICATIONS, SUPERVISION, DOCUMENTATION, ENVIRONMENTAL
PROTECTION, CONFINED SPACE PROCEDURES, LIFT STATIONS, PIPELINE REHABILITATION, CUSTOMER RELATIONS, AND
PROFESSIONAL STANDARDS.
QUESTION DISTRIBUTION:
SAFETY & REGULATORY COMPLIANCE – ~25 QUESTIONS
COLLECTION SYSTEM OPERATION & MAINTENANCE – ~35 QUESTIONS
HYDRAULICS & MATH APPLICATIONS – ~20 QUESTIONS
EQUIPMENT & TOOLS – ~20 QUESTIONS
LIFT STATIONS & PUMPING SYSTEMS – ~15 QUESTIONS
INSPECTION, CLEANING & CCTV – ~15 QUESTIONS
SEWER REHABILITATION & CONSTRUCTION – ~10 QUESTIONS
ADMINISTRATION, DOCUMENTATION & ETHICS – ~10 QUESTIONS
1. A confined space in a sewer manhole is classified as permit-required
primarily because it:
A. Is underground
B. Contains electrical equipment
C. Has potential atmospheric hazards
D. Is deeper than 4 feet
Rationale: Permit-required confined spaces are defined by the presence or
potential presence of hazardous atmospheres, engulfment hazards, or other serious
safety risks.
, 2. The minimum acceptable oxygen concentration for safe entry into a sewer
manhole is:
A. 15.0%
B. 18.0%
C. 19.5%
D. 23.5%
Rationale: OSHA defines safe oxygen levels between 19.5% and 23.5%.
3. Hydrogen sulfide gas is most dangerous because it:
A. Is explosive at any concentration
B. Deadens the sense of smell at high concentrations
C. Is lighter than air
D. Causes immediate unconsciousness at low levels
Rationale: H₂S paralyzes the olfactory nerve at high concentrations, eliminating
odor warning.
4. When traffic control is required, the primary reference document is:
A. OSHA 1910
B. Manual on Uniform Traffic Control Devices (MUTCD)
C. EPA 40 CFR
D. NFPA 70E
Rationale: MUTCD governs traffic control practices.
, 5. A sewer surcharge condition is indicated when:
A. Flow velocity exceeds 2 fps
B. The hydraulic grade line rises above the crown of the pipe
C. Flow depth is less than half pipe
D. Pump cycles increase
Rationale: Surcharge occurs when the pipe flows under pressure conditions.
6. The most appropriate first action when responding to a sanitary sewer
overflow (SSO) is to:
A. Notify media
B. Stop the overflow at its source if safely possible
C. Collect water samples
D. Issue public warning
Rationale: Immediate containment and stoppage minimizes environmental
damage.
7. A jetting nozzle that directs water backward primarily:
A. Cuts roots
B. Propels the hose forward and cleans pipe walls
C. Measures flow
D. Seals joints
, Rationale: Rear jets provide thrust and wall cleaning.
8. When using a mechanical rodding machine, the operator should:
A. Stand directly behind the rod
B. Wear cotton gloves
C. Avoid loose clothing near rotating parts
D. Operate without guards for visibility
Rationale: Rotating equipment poses entanglement hazards.
9. A common cause of grease buildup in laterals is:
A. High flow velocity
B. Industrial discharge
C. Improper disposal of fats, oils, and grease (FOG)
D. Excess rainfall
Rationale: FOG solidifies and accumulates in sewer lines.
10.The purpose of a force main air release valve is to:
A. Increase pressure
B. Reduce velocity
C. Remove trapped air from the pipeline
D. Prevent infiltration
EXAM – COMPREHENSIVE ASSESSMENT - LATEST PRACTICE
QUESTIONS AND 100% VERIFIED CORRECT ANSWERS |
COMPLETE EXAM PREP TESTBANK | GUARANTEED PASS |
INSTANT DOWNLOAD PDF
EXAM OVERVIEW:
THIS COMPREHENSIVE 150-QUESTION MULTIPLE-CHOICE EXAMINATION IS DESIGNED TO REFLECT THE FULL SCOPE OF
THE CWEA COLLECTION SYSTEMS MAINTENANCE GRADE 2 CERTIFICATION. IT INCLUDES FOUNDATIONAL THEORY,
APPLIED FIELD KNOWLEDGE, TROUBLESHOOTING, SAFETY, REGULATORY COMPLIANCE, EQUIPMENT OPERATION,
MAINTENANCE PRACTICES, HYDRAULICS, MATH APPLICATIONS, SUPERVISION, DOCUMENTATION, ENVIRONMENTAL
PROTECTION, CONFINED SPACE PROCEDURES, LIFT STATIONS, PIPELINE REHABILITATION, CUSTOMER RELATIONS, AND
PROFESSIONAL STANDARDS.
QUESTION DISTRIBUTION:
SAFETY & REGULATORY COMPLIANCE – ~25 QUESTIONS
COLLECTION SYSTEM OPERATION & MAINTENANCE – ~35 QUESTIONS
HYDRAULICS & MATH APPLICATIONS – ~20 QUESTIONS
EQUIPMENT & TOOLS – ~20 QUESTIONS
LIFT STATIONS & PUMPING SYSTEMS – ~15 QUESTIONS
INSPECTION, CLEANING & CCTV – ~15 QUESTIONS
SEWER REHABILITATION & CONSTRUCTION – ~10 QUESTIONS
ADMINISTRATION, DOCUMENTATION & ETHICS – ~10 QUESTIONS
1. A confined space in a sewer manhole is classified as permit-required
primarily because it:
A. Is underground
B. Contains electrical equipment
C. Has potential atmospheric hazards
D. Is deeper than 4 feet
Rationale: Permit-required confined spaces are defined by the presence or
potential presence of hazardous atmospheres, engulfment hazards, or other serious
safety risks.
, 2. The minimum acceptable oxygen concentration for safe entry into a sewer
manhole is:
A. 15.0%
B. 18.0%
C. 19.5%
D. 23.5%
Rationale: OSHA defines safe oxygen levels between 19.5% and 23.5%.
3. Hydrogen sulfide gas is most dangerous because it:
A. Is explosive at any concentration
B. Deadens the sense of smell at high concentrations
C. Is lighter than air
D. Causes immediate unconsciousness at low levels
Rationale: H₂S paralyzes the olfactory nerve at high concentrations, eliminating
odor warning.
4. When traffic control is required, the primary reference document is:
A. OSHA 1910
B. Manual on Uniform Traffic Control Devices (MUTCD)
C. EPA 40 CFR
D. NFPA 70E
Rationale: MUTCD governs traffic control practices.
, 5. A sewer surcharge condition is indicated when:
A. Flow velocity exceeds 2 fps
B. The hydraulic grade line rises above the crown of the pipe
C. Flow depth is less than half pipe
D. Pump cycles increase
Rationale: Surcharge occurs when the pipe flows under pressure conditions.
6. The most appropriate first action when responding to a sanitary sewer
overflow (SSO) is to:
A. Notify media
B. Stop the overflow at its source if safely possible
C. Collect water samples
D. Issue public warning
Rationale: Immediate containment and stoppage minimizes environmental
damage.
7. A jetting nozzle that directs water backward primarily:
A. Cuts roots
B. Propels the hose forward and cleans pipe walls
C. Measures flow
D. Seals joints
, Rationale: Rear jets provide thrust and wall cleaning.
8. When using a mechanical rodding machine, the operator should:
A. Stand directly behind the rod
B. Wear cotton gloves
C. Avoid loose clothing near rotating parts
D. Operate without guards for visibility
Rationale: Rotating equipment poses entanglement hazards.
9. A common cause of grease buildup in laterals is:
A. High flow velocity
B. Industrial discharge
C. Improper disposal of fats, oils, and grease (FOG)
D. Excess rainfall
Rationale: FOG solidifies and accumulates in sewer lines.
10.The purpose of a force main air release valve is to:
A. Increase pressure
B. Reduce velocity
C. Remove trapped air from the pipeline
D. Prevent infiltration
