Unit 12 TSSA
With 100% correct answers 2024 edition
Which is the main type of control module - ✔✔✔-intermitted pilot
-direct spark ignition
-hot surface ignition
-any of the above
The burner is operating, the heat exchanger temperature is above the fan-on
setpoint and the fan switch contacts are open. What should be done - ✔✔✔
replace the fan switch
Meter is connected to MV and common. What is he checking - ✔✔✔checking
power to main valve
What feature acts as extra protection on a redundant gas valve - ✔✔✔a second
shut off valve
What supervises the operation of gas-fired equipment if an unsafe condition is
present - ✔✔✔the high limit
What type of single-phase motor is commonly used in the gas Industry - ✔✔✔-
split-phase indiction motor
, -resistive start motor
-capacitor-start motor
-any of the above
Meter is connected to the 24v side of the transformer one lead on common and
the other is on the thermostat - ✔✔✔check for open thermostat contacts
Meter is connected to 24v gas valve and to common - ✔✔✔check for power to
main valve
Meter is connected to 24v secondary transformer side, one terminal connected
both sides of thermostat contacts - ✔✔✔check for open thermostat contacts
What component produces electricity when heated - ✔✔✔-thermocouple
-thermopile
A dot shown where wires cross on a wiring diagram means what - ✔✔✔the
wires are connected
Meter is connected to the 24v side of S89 gas valve and to common - ✔✔✔
check S89 terminals for power to redundant gas valve
What dose a basic combination gas valve include - ✔✔✔manual shut-off valve;
automatic gas valve; pressure regulator
With 100% correct answers 2024 edition
Which is the main type of control module - ✔✔✔-intermitted pilot
-direct spark ignition
-hot surface ignition
-any of the above
The burner is operating, the heat exchanger temperature is above the fan-on
setpoint and the fan switch contacts are open. What should be done - ✔✔✔
replace the fan switch
Meter is connected to MV and common. What is he checking - ✔✔✔checking
power to main valve
What feature acts as extra protection on a redundant gas valve - ✔✔✔a second
shut off valve
What supervises the operation of gas-fired equipment if an unsafe condition is
present - ✔✔✔the high limit
What type of single-phase motor is commonly used in the gas Industry - ✔✔✔-
split-phase indiction motor
, -resistive start motor
-capacitor-start motor
-any of the above
Meter is connected to the 24v side of the transformer one lead on common and
the other is on the thermostat - ✔✔✔check for open thermostat contacts
Meter is connected to 24v gas valve and to common - ✔✔✔check for power to
main valve
Meter is connected to 24v secondary transformer side, one terminal connected
both sides of thermostat contacts - ✔✔✔check for open thermostat contacts
What component produces electricity when heated - ✔✔✔-thermocouple
-thermopile
A dot shown where wires cross on a wiring diagram means what - ✔✔✔the
wires are connected
Meter is connected to the 24v side of S89 gas valve and to common - ✔✔✔
check S89 terminals for power to redundant gas valve
What dose a basic combination gas valve include - ✔✔✔manual shut-off valve;
automatic gas valve; pressure regulator
