TSSA G2 EVALUATION EXAMS ANSWERS AND
QUESTIONS SET A+
✔✔97. Net stack temperature is the flue gas temperature:
a) Downstream of the draft hood
b) Upstream of the draft hood
c) Plus the ambient temperature
d) Minus the ambient temperature. - ✔✔D
✔✔As the outlet temperature decreases from a water heater to the heating loop in a
combination heating system, the:
a) Heating output from the air handler decreases
b) Heating output from the air handler increases
c) Rate of heat transfer from the water to the air increases
d) Greater the temperature drop through the heating loop. - ✔✔A
✔✔The discharge piping from the temperature and pressure relief valve on a water
heater shall terminate not more than how high from the floor.
a) 3"
b) 6"
c) 12"
d) 18" - ✔✔C
,✔✔Which of the following statements is correct concerning a combination heating
system employing a water heater to supply domestic hot water and space heating?
a) An air handler can be concealed in a space just like ductwork
b) Check valves must be installed in both the supply and return line of the heating loop
c) The T&P valve must be removed from the water heater
d) Isolation valves should be installed in both the supply and return line of the heating
loop. - ✔✔D
✔✔The most likely cause of an intermittent hissing sound "like water dripping on
something hot" coming from a water heater is:
a) An intermittent leak in the flue that seals once the tank heats up.
b) Condensation in the flue passage caused by drawing water from the tank when the
hot water has been depleted
c) Condensation in the flue passage caused by high humidity in the combustion air
supply to the water heater
d) Condensation in the flue passage caused by high moisture content in the gas supply.
- ✔✔B
✔✔Most thermostatically controlled domestic hot water heaters utilize:
a) bi-metallic sensing
b) Rod and tube sensing
c) Liquid filled sensors
d) Vapour filled sensors. - ✔✔B
✔✔When determining the position of an air handler and a water heater to be connected
for combination heating use, the most important factor to consider from the following list
is:
a) Venting of the water heater
b) Water piping for the water heater
, c) Duct design for the air handler
d) Water piping to the air handler - ✔✔A
✔✔A customer complains that the pilot goes out every once in a while. This is the
second service call for this problem this month. When the pilot is reestablished, the
closed circuit millivolt test stays steady at 14mV, the magnet drops out at 4mV, what
should be done next?
a) Replace the gas valve because the magnet is weak
b) Clean and adjust the pilot and burners
c) Replace the thermocouple
d) Check for another problem such as down draft or pilot position. - ✔✔D
✔✔Which of the following is required to determine the size of a circulator pump to be
used on a combination heating system employing a water heater?
a) The temperature of the water and the amount of lift in the system
b) The required water flow rate and the head pressure in the complete heating loop
c) The diameter and length of the straight piping in the entire system
d) The temperature and the velocity of the water in both the domestic plumbing system
and
heating system. - ✔✔B
✔✔When diluting muriatic acid with water:
a) Add the acid to the water
b) Add the water to the acid
c) Add water to the acid one drop at a time for 10 drops then add the full amount
d) Add acid to the water one drop at a time for 10 drops then add the full amount. - ✔✔A
✔✔What should be done if a relief valve is leaking?
a) Remove the valve and clean off the calcium deposits
b) Replace the valve seat and check for the cause of the activation
QUESTIONS SET A+
✔✔97. Net stack temperature is the flue gas temperature:
a) Downstream of the draft hood
b) Upstream of the draft hood
c) Plus the ambient temperature
d) Minus the ambient temperature. - ✔✔D
✔✔As the outlet temperature decreases from a water heater to the heating loop in a
combination heating system, the:
a) Heating output from the air handler decreases
b) Heating output from the air handler increases
c) Rate of heat transfer from the water to the air increases
d) Greater the temperature drop through the heating loop. - ✔✔A
✔✔The discharge piping from the temperature and pressure relief valve on a water
heater shall terminate not more than how high from the floor.
a) 3"
b) 6"
c) 12"
d) 18" - ✔✔C
,✔✔Which of the following statements is correct concerning a combination heating
system employing a water heater to supply domestic hot water and space heating?
a) An air handler can be concealed in a space just like ductwork
b) Check valves must be installed in both the supply and return line of the heating loop
c) The T&P valve must be removed from the water heater
d) Isolation valves should be installed in both the supply and return line of the heating
loop. - ✔✔D
✔✔The most likely cause of an intermittent hissing sound "like water dripping on
something hot" coming from a water heater is:
a) An intermittent leak in the flue that seals once the tank heats up.
b) Condensation in the flue passage caused by drawing water from the tank when the
hot water has been depleted
c) Condensation in the flue passage caused by high humidity in the combustion air
supply to the water heater
d) Condensation in the flue passage caused by high moisture content in the gas supply.
- ✔✔B
✔✔Most thermostatically controlled domestic hot water heaters utilize:
a) bi-metallic sensing
b) Rod and tube sensing
c) Liquid filled sensors
d) Vapour filled sensors. - ✔✔B
✔✔When determining the position of an air handler and a water heater to be connected
for combination heating use, the most important factor to consider from the following list
is:
a) Venting of the water heater
b) Water piping for the water heater
, c) Duct design for the air handler
d) Water piping to the air handler - ✔✔A
✔✔A customer complains that the pilot goes out every once in a while. This is the
second service call for this problem this month. When the pilot is reestablished, the
closed circuit millivolt test stays steady at 14mV, the magnet drops out at 4mV, what
should be done next?
a) Replace the gas valve because the magnet is weak
b) Clean and adjust the pilot and burners
c) Replace the thermocouple
d) Check for another problem such as down draft or pilot position. - ✔✔D
✔✔Which of the following is required to determine the size of a circulator pump to be
used on a combination heating system employing a water heater?
a) The temperature of the water and the amount of lift in the system
b) The required water flow rate and the head pressure in the complete heating loop
c) The diameter and length of the straight piping in the entire system
d) The temperature and the velocity of the water in both the domestic plumbing system
and
heating system. - ✔✔B
✔✔When diluting muriatic acid with water:
a) Add the acid to the water
b) Add the water to the acid
c) Add water to the acid one drop at a time for 10 drops then add the full amount
d) Add acid to the water one drop at a time for 10 drops then add the full amount. - ✔✔A
✔✔What should be done if a relief valve is leaking?
a) Remove the valve and clean off the calcium deposits
b) Replace the valve seat and check for the cause of the activation
