OHIO MAINTENANCE TECHNICIAN EXAM QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES
Exam Coverage
• Maintenance safety and lockout/tagout
• Electrical fundamentals and controls
• Motors and motor troubleshooting
• Plumbing systems
• Water heaters and drainage
• HVAC and refrigeration
• Mechanical power transmission
• Bearings, lubrication, and alignment
• Pumps and fluid systems
• Tools, measurement, preventive maintenance, and hazard communication
1. After reviewing the applicable requirements and basic principles, Which statement most
accurately describes a GFCI detects an imbalance between current leaving and returning through
a circuit?
A) A GFCI detects an imbalance between current leaving and returning through a circuit.
B) It applies only when the equipment is completely disconnected from all energy sources.
C) It is primarily a documentation preference and does not affect the technical result.
,D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: A
Rationale: This is correct because The imbalance indicates current may be flowing through an
unintended path, creating shock risk. The key point is that the stated principle directly governs the
situation described.
2. When an experienced worker explains the principle to a trainee, In a field situation, which
statement would correctly apply to PPE is selected according to the hazards of the task?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) PPE is selected according to the hazards of the task.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: B
Rationale: This choice is supported by the governing concept that Protective equipment should
match exposure risks such as impact, electricity, chemicals, noise, or falls. The other choices do
not accurately state that relationship.
3. When evaluating a practical workplace or examination scenario, During routine work, which
option correctly identifies cavitation occurs when local pressure falls enough for vapor bubbles to
form and collapse?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) It is primarily a documentation preference and does not affect the technical result.
,C) Cavitation occurs when local pressure falls enough for vapor bubbles to form and collapse.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: C
Rationale: The answer follows from the underlying rule: Bubble collapse can produce noise,
vibration, reduced performance, and damage to pump components. Recognizing that relationship
is essential for applying the concept correctly.
4. After reviewing the applicable requirements and basic principles, Which statement most
accurately describes preventive maintenance is scheduled work intended to reduce failures?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) It is primarily a documentation preference and does not affect the technical result.
C) It is a procedure used only after the task has already been completed and inspected.
D) Preventive maintenance is scheduled work intended to reduce failures.
Correct Answer: D
Rationale: This is correct because Inspection, cleaning, lubrication, adjustment, and replacement
can address wear before breakdown. The key point is that the stated principle directly governs the
situation described.
5. When an experienced worker explains the principle to a trainee, In a field situation, which
statement would correctly apply to a bearing requires appropriate lubrication to reduce friction and
wear?
A) A bearing requires appropriate lubrication to reduce friction and wear.
, B) It applies only when the equipment is completely disconnected from all energy sources.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: A
Rationale: This choice is supported by the governing concept that Correct lubricant and quantity
help separate moving surfaces and control heat and wear. The other choices do not accurately
state that relationship.
6. When deciding which statement is technically defensible, Which option demonstrates correct
understanding of proper tool selection reduces damage and improves maintenance safety?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) Proper tool selection reduces damage and improves maintenance safety.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: B
Rationale: The defining feature is that Using the correct tool for the fastener or task reduces slips,
injuries, and equipment damage. This makes the selected response more technically accurate
than the alternatives.
7. When evaluating a practical workplace or examination scenario, During routine work, which
option correctly identifies a GFCI detects an imbalance between current leaving and returning
through a circuit?
RATIONALES
Exam Coverage
• Maintenance safety and lockout/tagout
• Electrical fundamentals and controls
• Motors and motor troubleshooting
• Plumbing systems
• Water heaters and drainage
• HVAC and refrigeration
• Mechanical power transmission
• Bearings, lubrication, and alignment
• Pumps and fluid systems
• Tools, measurement, preventive maintenance, and hazard communication
1. After reviewing the applicable requirements and basic principles, Which statement most
accurately describes a GFCI detects an imbalance between current leaving and returning through
a circuit?
A) A GFCI detects an imbalance between current leaving and returning through a circuit.
B) It applies only when the equipment is completely disconnected from all energy sources.
C) It is primarily a documentation preference and does not affect the technical result.
,D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: A
Rationale: This is correct because The imbalance indicates current may be flowing through an
unintended path, creating shock risk. The key point is that the stated principle directly governs the
situation described.
2. When an experienced worker explains the principle to a trainee, In a field situation, which
statement would correctly apply to PPE is selected according to the hazards of the task?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) PPE is selected according to the hazards of the task.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: B
Rationale: This choice is supported by the governing concept that Protective equipment should
match exposure risks such as impact, electricity, chemicals, noise, or falls. The other choices do
not accurately state that relationship.
3. When evaluating a practical workplace or examination scenario, During routine work, which
option correctly identifies cavitation occurs when local pressure falls enough for vapor bubbles to
form and collapse?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) It is primarily a documentation preference and does not affect the technical result.
,C) Cavitation occurs when local pressure falls enough for vapor bubbles to form and collapse.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: C
Rationale: The answer follows from the underlying rule: Bubble collapse can produce noise,
vibration, reduced performance, and damage to pump components. Recognizing that relationship
is essential for applying the concept correctly.
4. After reviewing the applicable requirements and basic principles, Which statement most
accurately describes preventive maintenance is scheduled work intended to reduce failures?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) It is primarily a documentation preference and does not affect the technical result.
C) It is a procedure used only after the task has already been completed and inspected.
D) Preventive maintenance is scheduled work intended to reduce failures.
Correct Answer: D
Rationale: This is correct because Inspection, cleaning, lubrication, adjustment, and replacement
can address wear before breakdown. The key point is that the stated principle directly governs the
situation described.
5. When an experienced worker explains the principle to a trainee, In a field situation, which
statement would correctly apply to a bearing requires appropriate lubrication to reduce friction and
wear?
A) A bearing requires appropriate lubrication to reduce friction and wear.
, B) It applies only when the equipment is completely disconnected from all energy sources.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: A
Rationale: This choice is supported by the governing concept that Correct lubricant and quantity
help separate moving surfaces and control heat and wear. The other choices do not accurately
state that relationship.
6. When deciding which statement is technically defensible, Which option demonstrates correct
understanding of proper tool selection reduces damage and improves maintenance safety?
A) It applies only when the equipment is completely disconnected from all energy sources.
B) Proper tool selection reduces damage and improves maintenance safety.
C) It is primarily a documentation preference and does not affect the technical result.
D) It is a procedure used only after the task has already been completed and inspected.
Correct Answer: B
Rationale: The defining feature is that Using the correct tool for the fastener or task reduces slips,
injuries, and equipment damage. This makes the selected response more technically accurate
than the alternatives.
7. When evaluating a practical workplace or examination scenario, During routine work, which
option correctly identifies a GFCI detects an imbalance between current leaving and returning
through a circuit?
