Exam Practice Test 100 Questions And

Gas Fitter Conversion Equipment Licensing Exam Practice Test 100 Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• When converting equipment from natural gas to propane, what is the

primary adjustment required?

a) Changing the venting system

b) Replacing orifices

c) Replacing the thermostat

d) Changing electrical wiring

Rationale: Propane requires smaller orifices due to higher energy

content and pressure.

• What is the typical manifold pressure for propane appliances?
• 0.5" w.c.
• 3.5" w.c.
• 10"–11" w.c. 1 / 3

• 14"–15" w.c.

Rationale: Propane appliances are commonly regulated to 10–11"

water column.

3. Natural gas pressure supplied to residential appliances is typically:

• 1–2 psi
• 3.5" w.c.
• 7–9" w.c.
• 11" w.c.

Rationale: The standard low-pressure natural gas manifold setting is

3.5" w.c.

4. Conversion of equipment must follow:

a) Manufacturer’s recommendation only

b) Local gas supplier’s rules only

c) Manufacturer instructions and applicable codes

d) Technician’s preference

Rationale: Legal compliance requires both code and manufacturer

approval.

5. Before starting a conversion, the appliance must be:

a) Operating

b) Unplugged only

c) Shut off from fuel and power

d) Covered in plastic

Rationale: Isolation from power and fuel is necessary for safe work. 2 / 3

6. Propane is:

a) Lighter than air

b) Heavier than air

c) Same as air

d) Noncombustible

Rationale: Propane is heavier than air and can pool in low areas.

7. A universal conversion kit should only be used if:

a) The technician approves

b) Manufacturer certifies compatibility

c) Supplier discounts the kit

d) The appliance is older than 10 years

Rationale: Manufacturer approval is required to maintain

certification and safety.

8. On a dual-fuel furnace, the gas conversion typically requires:

a) Thermostat relocation

b) Burner modification and pressure adjustment

c) New blower motor

d) Coil replacement

Rationale: Fuel type affects combustion, requiring burner and

pressure changes.

• What color flame indicates proper combustion?

a) Yellow

b) Blue

• / 3