,LADWP Maintenance and Construction Helper
Examination Questions and Correct Answers with
Rationales.pdf
Section 1: Reading Comprehension & Construction Instructions (Questions 1–20)
1. Which action best demonstrates careful reading when a written construction instruction specifies
both a required material and a particular installation sequence?
A. Select the material first and determine the sequence afterward
B. Begin installation and consult the instructions only when uncertain
C. Identify both requirements before beginning the assigned work
D. Follow the sequence while substituting a similar available material
Correct Answer: C
Rationale: Construction instructions often contain multiple requirements that must be satisfied
simultaneously. Identifying both the specified material and required sequence before starting reduces
errors, prevents rework, and ensures the work follows the authorized procedure.
2. A worker receives a written work order that includes a safety warning about underground electrical
hazards. What should the worker do FIRST?
A. Begin excavation at the marked location immediately
B. Review and understand the warning and follow all required safety procedures
C. Ask a co-worker to start digging while reviewing the warning
D. Ignore the warning if no electrical lines are visible
Correct Answer: B
Rationale: Safety warnings are included in work orders for a reason. The worker must review and
understand the warning before beginning work, and follow all required safety procedures to prevent
injury or damage to underground utilities.
3. Which of the following best describes the purpose of reading construction specifications before
starting a job?
A. To determine the cost of materials
B. To ensure the work is performed according to the required standards and sequence
C. To identify the names of the workers on the project
D. To calculate the number of hours needed to complete the work
Correct Answer: B
,Rationale: Construction specifications provide detailed requirements for materials, workmanship, and
installation procedures. Reading them before starting ensures the work is performed correctly and in
the proper sequence.
4. A safety sign on a job site reads "DANGER – CONFINED SPACE – ENTRY BY PERMIT ONLY." What
does this sign mean?
A. Anyone can enter the space at any time
B. Entry is prohibited unless a permit has been issued
C. The space is safe for entry without any special precautions
D. Only supervisors may enter the space
Correct Answer: B
Rationale: A confined space entry permit is required before entering certain hazardous spaces. The sign
indicates that entry is prohibited unless a permit has been properly issued, which documents
atmospheric testing, ventilation, and rescue procedures.
5. When reading a construction drawing, what does a dashed line typically represent?
A. An overhead line
B. A hidden or underground feature
C. A centerline
D. A property line
Correct Answer: B
Rationale: In construction drawings, dashed lines typically represent hidden or underground features,
such as buried utilities, hidden structural elements, or features not visible in the current view.
6. A worker is given verbal instructions that conflict with the written work order. What should the
worker do?
A. Follow the verbal instructions because they are more recent
B. Follow the written work order because it is the official document
C. Stop and seek clarification from the supervisor before proceeding
D. Ignore both and use personal judgment
Correct Answer: C
Rationale: When verbal and written instructions conflict, the worker should stop and seek clarification.
Proceeding without clarification could lead to errors, safety hazards, or non-compliant work.
7. What information is typically found on a material safety data sheet (SDS)?
, A. The cost of the material
B. Chemical hazards, safe handling, and emergency procedures
C. The name of the manufacturer's CEO
D. The date the material was purchased
Correct Answer: B
Rationale: A safety data sheet (SDS) provides detailed information about chemical hazards, safe
handling, storage, and emergency procedures. Workers must know how to access and interpret SDSs.
8. When reading a work order, which of the following is MOST important to verify before starting
work?
A. The color of the equipment
B. The location, scope, and any special safety requirements
C. The name of the person who wrote the order
D. The time of day the work will be performed
Correct Answer: B
Rationale: Before starting work, the worker must verify the location, scope of work, and any special
safety requirements. This ensures the work is performed correctly and safely.
9. A construction drawing uses a symbol of a circle with a diagonal line through it. What does this
typically indicate?
A. A valve
B. A pump
C. A light fixture
D. A drain
Correct Answer: A
Rationale: In piping and instrumentation diagrams, a circle with a diagonal line through it typically
represents a valve. Different valve symbols may indicate the type of valve (gate, globe, check, etc.).
10. What is the purpose of a legend on a construction drawing?
A. To show the drawing's scale
B. To explain the symbols and abbreviations used on the drawing
C. To list the names of the project team members
D. To provide the cost estimate for the project
Correct Answer: B
Examination Questions and Correct Answers with
Rationales.pdf
Section 1: Reading Comprehension & Construction Instructions (Questions 1–20)
1. Which action best demonstrates careful reading when a written construction instruction specifies
both a required material and a particular installation sequence?
A. Select the material first and determine the sequence afterward
B. Begin installation and consult the instructions only when uncertain
C. Identify both requirements before beginning the assigned work
D. Follow the sequence while substituting a similar available material
Correct Answer: C
Rationale: Construction instructions often contain multiple requirements that must be satisfied
simultaneously. Identifying both the specified material and required sequence before starting reduces
errors, prevents rework, and ensures the work follows the authorized procedure.
2. A worker receives a written work order that includes a safety warning about underground electrical
hazards. What should the worker do FIRST?
A. Begin excavation at the marked location immediately
B. Review and understand the warning and follow all required safety procedures
C. Ask a co-worker to start digging while reviewing the warning
D. Ignore the warning if no electrical lines are visible
Correct Answer: B
Rationale: Safety warnings are included in work orders for a reason. The worker must review and
understand the warning before beginning work, and follow all required safety procedures to prevent
injury or damage to underground utilities.
3. Which of the following best describes the purpose of reading construction specifications before
starting a job?
A. To determine the cost of materials
B. To ensure the work is performed according to the required standards and sequence
C. To identify the names of the workers on the project
D. To calculate the number of hours needed to complete the work
Correct Answer: B
,Rationale: Construction specifications provide detailed requirements for materials, workmanship, and
installation procedures. Reading them before starting ensures the work is performed correctly and in
the proper sequence.
4. A safety sign on a job site reads "DANGER – CONFINED SPACE – ENTRY BY PERMIT ONLY." What
does this sign mean?
A. Anyone can enter the space at any time
B. Entry is prohibited unless a permit has been issued
C. The space is safe for entry without any special precautions
D. Only supervisors may enter the space
Correct Answer: B
Rationale: A confined space entry permit is required before entering certain hazardous spaces. The sign
indicates that entry is prohibited unless a permit has been properly issued, which documents
atmospheric testing, ventilation, and rescue procedures.
5. When reading a construction drawing, what does a dashed line typically represent?
A. An overhead line
B. A hidden or underground feature
C. A centerline
D. A property line
Correct Answer: B
Rationale: In construction drawings, dashed lines typically represent hidden or underground features,
such as buried utilities, hidden structural elements, or features not visible in the current view.
6. A worker is given verbal instructions that conflict with the written work order. What should the
worker do?
A. Follow the verbal instructions because they are more recent
B. Follow the written work order because it is the official document
C. Stop and seek clarification from the supervisor before proceeding
D. Ignore both and use personal judgment
Correct Answer: C
Rationale: When verbal and written instructions conflict, the worker should stop and seek clarification.
Proceeding without clarification could lead to errors, safety hazards, or non-compliant work.
7. What information is typically found on a material safety data sheet (SDS)?
, A. The cost of the material
B. Chemical hazards, safe handling, and emergency procedures
C. The name of the manufacturer's CEO
D. The date the material was purchased
Correct Answer: B
Rationale: A safety data sheet (SDS) provides detailed information about chemical hazards, safe
handling, storage, and emergency procedures. Workers must know how to access and interpret SDSs.
8. When reading a work order, which of the following is MOST important to verify before starting
work?
A. The color of the equipment
B. The location, scope, and any special safety requirements
C. The name of the person who wrote the order
D. The time of day the work will be performed
Correct Answer: B
Rationale: Before starting work, the worker must verify the location, scope of work, and any special
safety requirements. This ensures the work is performed correctly and safely.
9. A construction drawing uses a symbol of a circle with a diagonal line through it. What does this
typically indicate?
A. A valve
B. A pump
C. A light fixture
D. A drain
Correct Answer: A
Rationale: In piping and instrumentation diagrams, a circle with a diagonal line through it typically
represents a valve. Different valve symbols may indicate the type of valve (gate, globe, check, etc.).
10. What is the purpose of a legend on a construction drawing?
A. To show the drawing's scale
B. To explain the symbols and abbreviations used on the drawing
C. To list the names of the project team members
D. To provide the cost estimate for the project
Correct Answer: B
