TSSA G2 COMPREHENSIVE ANSWERS AND
QUESTIONS SET A+
✔✔There are two appliances in a 10ft x 10ft x 20 ft structure which has an equivalent
leakage area greater than 0.05 square meters. A furnace has a draft hood and an input
of 50,000 Btuh. The second appliance has an input of 75,000 Btuh, and does not have a
draft hood. The required combustion air opening size is:
a) 0 square inches
b) 7 square inches
c) 9 square inches
d) 11 square inches
(0 mm2) (4500 mm2) (5800 mm2) (7000 mm2) - ✔✔C
✔✔Air enters a house through a process called ...
a) infiltration
b) Exfiltration
c) Aspiration
d) Expriation - ✔✔A
✔✔Two hot water boilers each firing at 750,000 Btuh, 1 water heater firing at 270,000
Btuh and 1 water heater firing at 30,000 Btuh. These appliances are contained in a
room with a cutout and a grill with 80% free area. What size in square inches should the
grill be?
a) 120 square inches
b) 240 square inches
c) 250 square inches
d) 1080 square inches - ✔✔C
✔✔What is the minimum size of a combustion air opening from outdoors for an
appliance without a draft hood and having an input of 125,000Btuh installed in a
structure that has a continuous vapour barrier and has an equivalent leakage area of
0.05 m2 at a differential pressure of 10 pascals and dimensions of 10ft x 10ft x 20ft?
a) 9 square inches
b) 11 square inches
,c) 18 square inches
d) 22 square inches - ✔✔A
✔✔What is the minimum size of the combustion air opening from outdoors for an
appliance without a draft hood and with an input of 50,000Btuh installed in a structure
which has an equivalent leakage area greater than 0.05 m2 and dimensions of 10ft x
10ft x 20ft?
a) 0 square inches,
b) 4 square inches,
c) 7 square inches,
d) 11 square inches. - ✔✔0
✔✔If the relative humidity of a room is increased, the temperature in the room must be
increase to maintain the same level of comfort.
a) True,
b) False. - ✔✔B
✔✔The best way to remove odours from a house is to:
a) Filter the air in the house,
b) Ventilate the house,
c) Install mechanical attic ventilation,
d) Humidify the air in the house. - ✔✔B
✔✔The main purpose of the building skin is to:
a) Protect the underlying materials,
b) Reduce heat gain,
c) Improve resistance to vapour flow,
d) Maintain the depressurization limit - ✔✔A
✔✔46. There is a new forced air furnace equipped with an induced draft fan beside a
conventional water heater in a basement. The customer has decided to enclose the
area to make a separate furnace room. The house is approximately 25 years old and
has a door separating the basement from the upper levels. Furnace input is
100,000Btuh with AWH input of 25,000 Btuh. The enclosure is 10ft x 20ft x 7ft. The
structure dimensions are 20ft x 30ft x 7ft x 3 levels. What size opening will be required
in the furnace room door for combustion air?
a) 0 square inches
b) 9 square inches
c) 18 square inches
d) 125 square inches - ✔✔D
✔✔The most important element required for proper combustion in a gas appliance is:
, a) Carbon dioxide,
b) Air,
c) Nitrogen,
d) Water vapour. - ✔✔B
✔✔When a baffle is required to prevent the direct entry of rain into an air supply
opening, by how much can the baffle reduce the required free area of the opening?
a) 0%
b) 1%
c) 3%
d) 5% - ✔✔A
✔✔Vapour barriers should be installed on:
a) The inside of the insulation,
b) The outside of the insulation,
c) The cold side of the insulation,
d) The warm side of the insulation. - ✔✔D
✔✔What device is used to prove a dryer motor is running?
a) Motor safety switch,
b) Motor sensor switch,
c) High limit switch,
d) Centrifugal switch. - ✔✔D
✔✔If too many lava rocks are placed in the rack of a barbeque:
a) The burner will burn out prematurely,
b) The food will cook faster,
c) The food will cook slower,
d) Delayed ignition will occur. - ✔✔A
✔✔52. What is the maximum clearance from the sides of a domestic range to
combustible materials, unless otherwise specified?
a) 1 inch,
b) 3 inches,
c) 6 inches,
d) 9 inches. - ✔✔C
✔✔How long may a corrugated flexible connector be when installed on a range?
a) 2 feet,
b) 6 feet,
c) 8 feet,
d) No maximum. - ✔✔B
QUESTIONS SET A+
✔✔There are two appliances in a 10ft x 10ft x 20 ft structure which has an equivalent
leakage area greater than 0.05 square meters. A furnace has a draft hood and an input
of 50,000 Btuh. The second appliance has an input of 75,000 Btuh, and does not have a
draft hood. The required combustion air opening size is:
a) 0 square inches
b) 7 square inches
c) 9 square inches
d) 11 square inches
(0 mm2) (4500 mm2) (5800 mm2) (7000 mm2) - ✔✔C
✔✔Air enters a house through a process called ...
a) infiltration
b) Exfiltration
c) Aspiration
d) Expriation - ✔✔A
✔✔Two hot water boilers each firing at 750,000 Btuh, 1 water heater firing at 270,000
Btuh and 1 water heater firing at 30,000 Btuh. These appliances are contained in a
room with a cutout and a grill with 80% free area. What size in square inches should the
grill be?
a) 120 square inches
b) 240 square inches
c) 250 square inches
d) 1080 square inches - ✔✔C
✔✔What is the minimum size of a combustion air opening from outdoors for an
appliance without a draft hood and having an input of 125,000Btuh installed in a
structure that has a continuous vapour barrier and has an equivalent leakage area of
0.05 m2 at a differential pressure of 10 pascals and dimensions of 10ft x 10ft x 20ft?
a) 9 square inches
b) 11 square inches
,c) 18 square inches
d) 22 square inches - ✔✔A
✔✔What is the minimum size of the combustion air opening from outdoors for an
appliance without a draft hood and with an input of 50,000Btuh installed in a structure
which has an equivalent leakage area greater than 0.05 m2 and dimensions of 10ft x
10ft x 20ft?
a) 0 square inches,
b) 4 square inches,
c) 7 square inches,
d) 11 square inches. - ✔✔0
✔✔If the relative humidity of a room is increased, the temperature in the room must be
increase to maintain the same level of comfort.
a) True,
b) False. - ✔✔B
✔✔The best way to remove odours from a house is to:
a) Filter the air in the house,
b) Ventilate the house,
c) Install mechanical attic ventilation,
d) Humidify the air in the house. - ✔✔B
✔✔The main purpose of the building skin is to:
a) Protect the underlying materials,
b) Reduce heat gain,
c) Improve resistance to vapour flow,
d) Maintain the depressurization limit - ✔✔A
✔✔46. There is a new forced air furnace equipped with an induced draft fan beside a
conventional water heater in a basement. The customer has decided to enclose the
area to make a separate furnace room. The house is approximately 25 years old and
has a door separating the basement from the upper levels. Furnace input is
100,000Btuh with AWH input of 25,000 Btuh. The enclosure is 10ft x 20ft x 7ft. The
structure dimensions are 20ft x 30ft x 7ft x 3 levels. What size opening will be required
in the furnace room door for combustion air?
a) 0 square inches
b) 9 square inches
c) 18 square inches
d) 125 square inches - ✔✔D
✔✔The most important element required for proper combustion in a gas appliance is:
, a) Carbon dioxide,
b) Air,
c) Nitrogen,
d) Water vapour. - ✔✔B
✔✔When a baffle is required to prevent the direct entry of rain into an air supply
opening, by how much can the baffle reduce the required free area of the opening?
a) 0%
b) 1%
c) 3%
d) 5% - ✔✔A
✔✔Vapour barriers should be installed on:
a) The inside of the insulation,
b) The outside of the insulation,
c) The cold side of the insulation,
d) The warm side of the insulation. - ✔✔D
✔✔What device is used to prove a dryer motor is running?
a) Motor safety switch,
b) Motor sensor switch,
c) High limit switch,
d) Centrifugal switch. - ✔✔D
✔✔If too many lava rocks are placed in the rack of a barbeque:
a) The burner will burn out prematurely,
b) The food will cook faster,
c) The food will cook slower,
d) Delayed ignition will occur. - ✔✔A
✔✔52. What is the maximum clearance from the sides of a domestic range to
combustible materials, unless otherwise specified?
a) 1 inch,
b) 3 inches,
c) 6 inches,
d) 9 inches. - ✔✔C
✔✔How long may a corrugated flexible connector be when installed on a range?
a) 2 feet,
b) 6 feet,
c) 8 feet,
d) No maximum. - ✔✔B
