1. Which of the following is one of the prime safety concerns in positioning a
gas furnace for installation?
a. An adequate gas supply.
b. The aṿailability of flue within 2 feet of the appliance.
c. Clearance from combustible materials.
d. Distance from circuit breaker.: C
2. The discharge of the bypass humidifier is installed:
a. In the supply duct.
b. In the exhaust air duct.
c. In the return air duct.
d. In the makeup air duct.: C
3. For proper burner operation, the manifold pressure on atmospheric draft,
natural gas-fired furnaces should be:
a. 3-4 IWC
b. 10-12 IWC
c. 3-4 psig.
d. 10-12 psig.: A
4. During an initial installation and checkout of an intermittent pilot retrofit
system, if the pilot both lights and burns continuously, and the sparks remains
on but the main burner does not light, these problems indicate that the:
a. Thermostat is not set for the proper cycling rate.
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, b. Ignition system has failed to detect the pilot flame.
c. Thermostat is not set for heating.
d. Pilot ṿalṿe is improperly wired.: B
5. To determine the heat anticipator setting on an electromechanical ther-
mostat, the amp draw should be taken at the thermostat sub-base between
terminals:
a. R and Y.
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gas furnace for installation?
a. An adequate gas supply.
b. The aṿailability of flue within 2 feet of the appliance.
c. Clearance from combustible materials.
d. Distance from circuit breaker.: C
2. The discharge of the bypass humidifier is installed:
a. In the supply duct.
b. In the exhaust air duct.
c. In the return air duct.
d. In the makeup air duct.: C
3. For proper burner operation, the manifold pressure on atmospheric draft,
natural gas-fired furnaces should be:
a. 3-4 IWC
b. 10-12 IWC
c. 3-4 psig.
d. 10-12 psig.: A
4. During an initial installation and checkout of an intermittent pilot retrofit
system, if the pilot both lights and burns continuously, and the sparks remains
on but the main burner does not light, these problems indicate that the:
a. Thermostat is not set for the proper cycling rate.
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11
, b. Ignition system has failed to detect the pilot flame.
c. Thermostat is not set for heating.
d. Pilot ṿalṿe is improperly wired.: B
5. To determine the heat anticipator setting on an electromechanical ther-
mostat, the amp draw should be taken at the thermostat sub-base between
terminals:
a. R and Y.
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11
