CUSP - T&D Exam Questions & Answers 150
Questions with Correct Answers.
SECTION 1: LOCKOUT/TAGOUT & ISOLATION PROCEDURES
Question 1
As per CAN/ULC S801, on an electrical distribution overhead utility line circuit,
verification of voltage absence can be achieved by:
A) Checking for visible open switches
B) Using an approved voltage detector
C) Relying on the circuit tag
D) Observing the circuit for signs of life
Correct Answer: B
Rationale: Voltage absence must be verified using an approved voltage detector .
Question 2
Isolation and tagging (no locks) is acceptable on an overhead distribution circuit
under some conditions, EXCEPT for:
A) The isolation point is a physical and visual line cut or riser removed
B) The isolation can be operated from the ground directly at the base of a
structure
C) The isolation point can only be operated by the operating authority
D) The isolation point is protected from unauthorized access
Correct Answer: B
Rationale: If an isolation can be operated from the ground, it does not meet the
criteria for tag-only isolation .
,Question 3
Isolation and tagging (no locks) is acceptable for an overhead distribution circuit
under which conditions?
A) The isolation point is a physical and visual like a line cut or riser removed
B) The isolation point can only be operated by the operating authority or
qualified worker
C) The isolation point is protected from unauthorized access such as vertical
height spacing
D) The isolation point is accessible to all workers
Correct Answer: A, B, and C
Rationale: Tag-only isolation requires visual/physical isolation, authority-only
operation, and protection from unauthorized access .
Question 4
Consider that a circuit has been isolated, tagged and grounded. Workers returning
the next day must:
A) Proceed with work as planned
B) Visually check grounds to verify they are in good order, secure and test for
voltage
C) Re-isolate the circuit entirely
D) Only verify the tags are still in place
Correct Answer: B
Rationale: Grounds must be visually inspected for condition and securement, and
voltage must be verified before resuming work .
Question 5
For lockout purposes, energy isolating devices shall be labelled or marked using a
, standardized nomenclature and format to indicate their function. Identification
shall include:
A) The equipment type, energy type, and magnitude
B) The equipment type only
C) The date of installation
D) The manufacturer's name
Correct Answer: A
Rationale: Lockout identification must include equipment type, energy type, and
energy magnitude .
Question 6
Utilities often use a permitting system due to special circumstances where
conventional lockout is impracticable. The following is NOT a justified approach to
this process:
A) Isolation points are located in remote areas with difficult or restricted access
B) The isolation points are only simple single step actions
C) The length of time to perform the lockout is impracticable
D) Excessive numbers of persons required to lockout
Correct Answer: B
Rationale: Simple single-step actions do not justify bypassing conventional lockout
procedures .
Question 7
A high voltage utility or electrical company is authorized to use Complex Lockout
(tag permitting) under what regulatory condition?
A) The utility's internal safety policy permits it
B) A variance application has been approved by the provincial authority
Questions with Correct Answers.
SECTION 1: LOCKOUT/TAGOUT & ISOLATION PROCEDURES
Question 1
As per CAN/ULC S801, on an electrical distribution overhead utility line circuit,
verification of voltage absence can be achieved by:
A) Checking for visible open switches
B) Using an approved voltage detector
C) Relying on the circuit tag
D) Observing the circuit for signs of life
Correct Answer: B
Rationale: Voltage absence must be verified using an approved voltage detector .
Question 2
Isolation and tagging (no locks) is acceptable on an overhead distribution circuit
under some conditions, EXCEPT for:
A) The isolation point is a physical and visual line cut or riser removed
B) The isolation can be operated from the ground directly at the base of a
structure
C) The isolation point can only be operated by the operating authority
D) The isolation point is protected from unauthorized access
Correct Answer: B
Rationale: If an isolation can be operated from the ground, it does not meet the
criteria for tag-only isolation .
,Question 3
Isolation and tagging (no locks) is acceptable for an overhead distribution circuit
under which conditions?
A) The isolation point is a physical and visual like a line cut or riser removed
B) The isolation point can only be operated by the operating authority or
qualified worker
C) The isolation point is protected from unauthorized access such as vertical
height spacing
D) The isolation point is accessible to all workers
Correct Answer: A, B, and C
Rationale: Tag-only isolation requires visual/physical isolation, authority-only
operation, and protection from unauthorized access .
Question 4
Consider that a circuit has been isolated, tagged and grounded. Workers returning
the next day must:
A) Proceed with work as planned
B) Visually check grounds to verify they are in good order, secure and test for
voltage
C) Re-isolate the circuit entirely
D) Only verify the tags are still in place
Correct Answer: B
Rationale: Grounds must be visually inspected for condition and securement, and
voltage must be verified before resuming work .
Question 5
For lockout purposes, energy isolating devices shall be labelled or marked using a
, standardized nomenclature and format to indicate their function. Identification
shall include:
A) The equipment type, energy type, and magnitude
B) The equipment type only
C) The date of installation
D) The manufacturer's name
Correct Answer: A
Rationale: Lockout identification must include equipment type, energy type, and
energy magnitude .
Question 6
Utilities often use a permitting system due to special circumstances where
conventional lockout is impracticable. The following is NOT a justified approach to
this process:
A) Isolation points are located in remote areas with difficult or restricted access
B) The isolation points are only simple single step actions
C) The length of time to perform the lockout is impracticable
D) Excessive numbers of persons required to lockout
Correct Answer: B
Rationale: Simple single-step actions do not justify bypassing conventional lockout
procedures .
Question 7
A high voltage utility or electrical company is authorized to use Complex Lockout
(tag permitting) under what regulatory condition?
A) The utility's internal safety policy permits it
B) A variance application has been approved by the provincial authority
