IHS ACTUAL EXAM SCRIPT 2026 QUESTIONS
WITH ANSWERS GRADED A+
◉ What is the primary purpose of LOTO? Answer: To prevent the
unexpected energization, startup, or release of stored energy during
servicing or maintenance.
◉ What is AMEC and when is it used? Answer: AMEC (Alternative
Method of Energy Control) is used when full LOTO is not feasible, the
task is routine/repetitive/integral to production, and equivalent or greater
protection is demonstrated.
◉ What is the correct sequence for energy isolation? Answer: Notify
affected employees; shut down equipment; isolate all energy sources;
apply LOTO devices; release or restrain stored energy; verify zero
energy state.
◉ What does "verify zero energy" mean in practice? Answer: Attempt
start using normal controls, measure electrical voltage where applicable,
visually confirm mechanical isolation; verification must be documented
when required.
◉ What is the difference between authorized, affected, and other
employees? Answer: Authorized performs LOTO; affected works near
, equipment under LOTO; other may pass through the area—each has
different training requirements.
◉ When is group LOTO required? Answer: When multiple employees
or crafts work on the same equipment and individual locks alone do not
provide sufficient control.
◉ What is a machine safety map and why is it important? Answer: A
map identifying energy sources, isolation points, control circuits, and
safety devices; supports risk assessments, LOTO development, and
audits.
◉ What is the difference between energy isolation and control
reliability? Answer: Isolation physically separates energy; control
reliability ensures safety functions perform despite faults— isolation is
preferred, control reliability supports AMEC.
◉ What does ISO 13849 address? Answer: Safety-related control system
design, Performance Levels (PL a-e), and reliability of safety circuits.
◉ What is the difference between ISO 12100 and ISO 14121? Answer:
ISO 12100 provides general machine safety principles; ISO 14121
provides risk assessment methodology.
WITH ANSWERS GRADED A+
◉ What is the primary purpose of LOTO? Answer: To prevent the
unexpected energization, startup, or release of stored energy during
servicing or maintenance.
◉ What is AMEC and when is it used? Answer: AMEC (Alternative
Method of Energy Control) is used when full LOTO is not feasible, the
task is routine/repetitive/integral to production, and equivalent or greater
protection is demonstrated.
◉ What is the correct sequence for energy isolation? Answer: Notify
affected employees; shut down equipment; isolate all energy sources;
apply LOTO devices; release or restrain stored energy; verify zero
energy state.
◉ What does "verify zero energy" mean in practice? Answer: Attempt
start using normal controls, measure electrical voltage where applicable,
visually confirm mechanical isolation; verification must be documented
when required.
◉ What is the difference between authorized, affected, and other
employees? Answer: Authorized performs LOTO; affected works near
, equipment under LOTO; other may pass through the area—each has
different training requirements.
◉ When is group LOTO required? Answer: When multiple employees
or crafts work on the same equipment and individual locks alone do not
provide sufficient control.
◉ What is a machine safety map and why is it important? Answer: A
map identifying energy sources, isolation points, control circuits, and
safety devices; supports risk assessments, LOTO development, and
audits.
◉ What is the difference between energy isolation and control
reliability? Answer: Isolation physically separates energy; control
reliability ensures safety functions perform despite faults— isolation is
preferred, control reliability supports AMEC.
◉ What does ISO 13849 address? Answer: Safety-related control system
design, Performance Levels (PL a-e), and reliability of safety circuits.
◉ What is the difference between ISO 12100 and ISO 14121? Answer:
ISO 12100 provides general machine safety principles; ISO 14121
provides risk assessment methodology.
