Page 1 of 50
INDIANA LAFAYETTE MECHANICAL
CONTRACTOR EXAM PRACTICE
QUESTIONS AND ANSWERS WITH
DETAILED RATIONALES CURRENT
TESTING
D
O
Section 1: Indiana Mechanical Code – General Provisions (Questions 1–15)
N
O
1. What is the minimum working space required in front of the control side of
T
an appliance for service access?
C
A. 24 inches deep and 24 inches wide
O
B. 30 inches deep and 30 inches wide
PY
C. 36 inches deep and 36 inches wide
D. 48 inches deep and 48 inches wide
Correct answer: B. 30 inches deep and 30 inches wide
Rationale: A level working space not less than 30 inches deep and 30 inches wide
must be provided in front of the control side to service an appliance.
2. Under the Indiana Mechanical Code, which space is prohibited from
providing return air to a warm-air furnace?
A. An attic with passive ventilation
B. A basement with a concrete slab floor
C. A garage that stores gasoline-powered equipment
, Page 2 of 50
D. A conditioned living room
Correct answer: C. A garage that stores gasoline-powered equipment
Rationale: Return air may not be drawn from spaces containing hazardous
combustibles (such as garages) because it can introduce flammable vapors into the
furnace combustion chamber.
3. A permit for mechanical work in Indiana expires after how many days if
work has not begun?
A. 30 days
B. 60 days
D
C. 90 days
O
D. 120 days
N
Correct answer: B. 60 days
O
Rationale: Indiana permits expire 60 days after issuance if work has not begun,
T
unless an extension is granted.
C
O
4. A permit holder must be present during which of the following inspections?
PY
A. Rough-in inspection only
B. Final inspection only
C. Both rough-in and final inspections
D. Neither; the inspector can conduct inspections without the permit holder
Correct answer: C. Both rough-in and final inspections
Rationale: The permit holder (or their authorized representative) must be
present for both rough-in and final inspections to verify compliance and answer
questions.
, Page 3 of 50
5. Inspectors conducting mechanical inspections in Indiana may enter a
property:
A. Only during business hours with a warrant
B. Only during business hours with 24-hour written notice
C. At any reasonable time with prior verbal notice to the contractor
D. Only with a signed waiver from the property owner
Correct answer: C. At any reasonable time with prior verbal notice to the
contractor
Rationale: Inspectors may enter at reasonable times after the contractor is given
verbal notice, per Indiana inspection rules.
D
O
6. Which Indiana administrative code governs the installation of mechanical
systems in the state? A. 675 IAC 16 (Indiana Plumbing Code) B. 675 IAC 17
N
(Indiana Electrical Code)
O
C. 675 IAC 18 (Indiana Mechanical Code)
T
D. 675 IAC 25 (Indiana Fuel Gas Code)
C
Correct answer: C. 675 IAC 18 (Indiana Mechanical Code) Rationale: The
O
Indiana Mechanical Code is codified at 675 IAC 18 and contains the requirements
PY
for mechanical system installation, including HVAC, refrigeration, and ventilation
systems in the state.
7. What is the primary intent of the Indiana Mechanical Code?
A. To maximize energy efficiency in all buildings
B. To prescribe maintenance, new construction requirements, and operational
rules for safeguarding life and property from fire or explosion hazards
C. To regulate the licensing of mechanical contractors only D. To establish
minimum wage requirements for mechanical workers
, Page 4 of 50
Correct answer: B. To prescribe maintenance, new construction
requirements, and operational rules for safeguarding life and property from
fire or explosion hazards
Rationale: The Indiana Mechanical Code (675 IAC 18) is intended to prescribe
maintenance, new construction requirements, and operational rules for safeguarding
life and property from the hazards of fire or explosion arising from the storage,
handling, or use of substances, materials, and devices.
8. The Indiana Mechanical Code (675 IAC 18) is based on which edition of the
International Mechanical Code?
A. 2006 International Mechanical Code
D
B. 2009 International Mechanical Code
O
C. 2012 International Mechanical Code (1st printing)
N
D. 2015 International Mechanical Code
O
Correct answer: C. 2012 International Mechanical Code (1st printing)
T
Rationale: The Indiana Mechanical Code is based on the 2012 International
C
Mechanical Code (1st printing) with Indiana amendments, effective
O
December 1, 2014.
PY
9. Which of the following best defines "Approved" as used in the Indiana
Mechanical Code?
A. A product that meets the minimum performance criteria of the code
B. A product that has been tested and listed by a recognized testing agency and
meets applicable standards
C. A product that the installer personally deems suitable
D. A product that is the least expensive option
INDIANA LAFAYETTE MECHANICAL
CONTRACTOR EXAM PRACTICE
QUESTIONS AND ANSWERS WITH
DETAILED RATIONALES CURRENT
TESTING
D
O
Section 1: Indiana Mechanical Code – General Provisions (Questions 1–15)
N
O
1. What is the minimum working space required in front of the control side of
T
an appliance for service access?
C
A. 24 inches deep and 24 inches wide
O
B. 30 inches deep and 30 inches wide
PY
C. 36 inches deep and 36 inches wide
D. 48 inches deep and 48 inches wide
Correct answer: B. 30 inches deep and 30 inches wide
Rationale: A level working space not less than 30 inches deep and 30 inches wide
must be provided in front of the control side to service an appliance.
2. Under the Indiana Mechanical Code, which space is prohibited from
providing return air to a warm-air furnace?
A. An attic with passive ventilation
B. A basement with a concrete slab floor
C. A garage that stores gasoline-powered equipment
, Page 2 of 50
D. A conditioned living room
Correct answer: C. A garage that stores gasoline-powered equipment
Rationale: Return air may not be drawn from spaces containing hazardous
combustibles (such as garages) because it can introduce flammable vapors into the
furnace combustion chamber.
3. A permit for mechanical work in Indiana expires after how many days if
work has not begun?
A. 30 days
B. 60 days
D
C. 90 days
O
D. 120 days
N
Correct answer: B. 60 days
O
Rationale: Indiana permits expire 60 days after issuance if work has not begun,
T
unless an extension is granted.
C
O
4. A permit holder must be present during which of the following inspections?
PY
A. Rough-in inspection only
B. Final inspection only
C. Both rough-in and final inspections
D. Neither; the inspector can conduct inspections without the permit holder
Correct answer: C. Both rough-in and final inspections
Rationale: The permit holder (or their authorized representative) must be
present for both rough-in and final inspections to verify compliance and answer
questions.
, Page 3 of 50
5. Inspectors conducting mechanical inspections in Indiana may enter a
property:
A. Only during business hours with a warrant
B. Only during business hours with 24-hour written notice
C. At any reasonable time with prior verbal notice to the contractor
D. Only with a signed waiver from the property owner
Correct answer: C. At any reasonable time with prior verbal notice to the
contractor
Rationale: Inspectors may enter at reasonable times after the contractor is given
verbal notice, per Indiana inspection rules.
D
O
6. Which Indiana administrative code governs the installation of mechanical
systems in the state? A. 675 IAC 16 (Indiana Plumbing Code) B. 675 IAC 17
N
(Indiana Electrical Code)
O
C. 675 IAC 18 (Indiana Mechanical Code)
T
D. 675 IAC 25 (Indiana Fuel Gas Code)
C
Correct answer: C. 675 IAC 18 (Indiana Mechanical Code) Rationale: The
O
Indiana Mechanical Code is codified at 675 IAC 18 and contains the requirements
PY
for mechanical system installation, including HVAC, refrigeration, and ventilation
systems in the state.
7. What is the primary intent of the Indiana Mechanical Code?
A. To maximize energy efficiency in all buildings
B. To prescribe maintenance, new construction requirements, and operational
rules for safeguarding life and property from fire or explosion hazards
C. To regulate the licensing of mechanical contractors only D. To establish
minimum wage requirements for mechanical workers
, Page 4 of 50
Correct answer: B. To prescribe maintenance, new construction
requirements, and operational rules for safeguarding life and property from
fire or explosion hazards
Rationale: The Indiana Mechanical Code (675 IAC 18) is intended to prescribe
maintenance, new construction requirements, and operational rules for safeguarding
life and property from the hazards of fire or explosion arising from the storage,
handling, or use of substances, materials, and devices.
8. The Indiana Mechanical Code (675 IAC 18) is based on which edition of the
International Mechanical Code?
A. 2006 International Mechanical Code
D
B. 2009 International Mechanical Code
O
C. 2012 International Mechanical Code (1st printing)
N
D. 2015 International Mechanical Code
O
Correct answer: C. 2012 International Mechanical Code (1st printing)
T
Rationale: The Indiana Mechanical Code is based on the 2012 International
C
Mechanical Code (1st printing) with Indiana amendments, effective
O
December 1, 2014.
PY
9. Which of the following best defines "Approved" as used in the Indiana
Mechanical Code?
A. A product that meets the minimum performance criteria of the code
B. A product that has been tested and listed by a recognized testing agency and
meets applicable standards
C. A product that the installer personally deems suitable
D. A product that is the least expensive option
