Part # 6 Flashcards
- What is power measured in?
a. Amps
b. Ohms
c. Volts
d. Watts (d)
- What is combustion air?
a. The air required to operate the blower fan.
b. The air required for satisfactory combustion of a gas. (b)
c. The air required for complete furnace operation.
d. The air needed for the draft regulator.
- Natural gas containing propane, butane, pentane and other heavy hydrocarbons is typically referred to as _______ gas?
a. Dry
b. Wet (B)
c. Sweet
d. Sour
- A “bill of materials” is a:
a. List sent by the manufacturer as a check list of the materials delivered to the site
b. Purchase order copy indicating the materials which were ordered
c. List indicating the materials required to complete an installation
d. List of all the materials used manufacturing the equipment (D)
- Who is authorized to work on liquid propane systems?
a. A holder of a “LP” certificate (A)
b. Any of the above
c. A licensed gas technician
d. The propane supplier
- Approximately what percentage of air is made up of oxygen?
a. 80%
b. 20% (B)
c. 30%
d. 25%
- What type of diagram is typically found in the manufacturer’s installation manual?
a. Piping
b. Wiring
c. Ductwork
d. Both A and B (D)
- When rescuing electric shock victims, you should first?
a. Apply CPR
b. Call 911
c. Apply artificial respiration
d. Free the victim from electricity contact (D)
- Which of the following is an operating control?
a. Low water cut-off
b. Thermostat (B)
c. Air proving switch
d. Pressure relief valve
- At what percentage can we safely over fire an appliance?
a. 10%
b. 5%
c. 3%
d. 0% (D)
- Underground piping shall be tested for leaks?
a. After being covered
b. With air pressure and a fluorescent dye
c. Hydrostatically (C)
d. With air pressure and a soap solution
- If the scale on a mechanical drawing is 1/8” – 1’0”, then a line measuring 4” in a length is actually:
a. 32 Inches
b. 4 Feet
c. 8 Feet
d. 32 Feet (D)
- When purging to the outdoors, the purging should terminate at least ____ feet from building or air intake?
a. 6
b. 10 (B)
c. 12
d. 3
- Which gas can be used to purge air out of systems with pipe 4 inch and larger?
a. Nitrogen
b. Line Gas
c. Carbon Dioxide
d. Both A and C (D)
- On a 120 volt circuit, the voltage to ground from an unbroken neutral wire should be:
a. 24 Volt
b. 110 Volt
c. 0 Volt (0)
d. 120 Volt
- If the cause of sooting is scale on top of the burner, what is the corrective action?
a. Spray the scale with vinegar
b. Shut off the appliance and remove the scale (B)
c. Chip the scale away with a screw driver
d. Bang the gas train with a hammer or wrench to shake the scale loose
- How will taking notes when the customer is explaining the problem help?
a. You will have valuable information to include in the final report
b. You can create a checklist to ensure the problem is resolved when you have completed your work
c. You assure the customer that you will not forget why you are there (C)
d. You are indicating to the customer that you value their input
- If a work order requires you to determine the problem with an apparent control malfunction, what information will you need?
a. A wiring schematic
b. Manufacturer’s installation instructions
c. Manufacturer’s service manual (C)
d. All of the above
- Propane-burning appliances installed in a mobile home must comply with which standards?
a. Clause 11 of the B149.2 and the CSA Z240.2
b. Clause 11 of the B149.2 and the national building code
c. Clause 11 of the B149.2 and the national fire code
d. Clause 11 of the B149.2 and the CSA Z240.1 (D)
- What is the air to gas ratio for propane?
a. 21 to 1
b. 10 to 1
c. 0.5 to 1
d. 1 to 25 (D)
