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TSSA G2 -GASTECHNICIAN.CA FINAL EXAM 300+ QUESTIONS & CORRECT ANSWERS WITH RATIONALES, Exams of Nursing

TSSA G2 -GASTECHNICIAN.CA FINAL EXAM 300+ QUESTIONS & CORRECT ANSWERS WITH RATIONALES (MULTICHOICE) BRAND NEW

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TSSA G2 -GASTECHNICIAN.CA FINAL EXAM 300+
QUESTIONS & CORRECT ANSWERS WITH RATIONALES
(MULTICHOICE) BRAND NEW
A room heater installed in either a sleeping area or public area shall be:
A. direct vent only
B. equipped with a regulator
C. equipped with a fan
D. equipped with an on / off switch on the wall - CORRECT ANSWER >>>B
What type of vent must be used when the vent of a wall furnace will be concealed in a partition
wall?
A. B vent
B. L vent
C. BH vent
D. BW vent - CORRECT ANSWER >>>D
Single wall vent connectors:
A. may pass through floors, ceilings or roofs provided a metal thimble is used
B. may pass through floors, ceilings or roofs provided the required minimum distance from
combustible material is maintained
C. may pass through floors, ceilings or roofs provided they are insulated
D. shall not pass through floors, ceilings or roofs - CORRECT ANSWER >>>D
BW vent shall be used only with an approved:
A. decorative appliance
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TSSA G2 - GASTECHNICIAN.CA FINAL EXAM 300+

QUESTIONS & CORRECT ANSWERS WITH RATIONALES

(MULTICHOICE) BRAND NEW

A room heater installed in either a sleeping area or public area shall be: A. direct vent only B. equipped with a regulator C. equipped with a fan D. equipped with an on / off switch on the wall - CORRECT ANSWER >>> B What type of vent must be used when the vent of a wall furnace will be concealed in a partition wall? A. B vent B. L vent C. BH vent D. BW vent - CORRECT ANSWER >>> D Single wall vent connectors: A. may pass through floors, ceilings or roofs provided a metal thimble is used B. may pass through floors, ceilings or roofs provided the required minimum distance from combustible material is maintained C. may pass through floors, ceilings or roofs provided they are insulated D. shall not pass through floors, ceilings or roofs - CORRECT ANSWER >>> D BW vent shall be used only with an approved: A. decorative appliance

B. down flow furnace C. revertible flue boiler D. recessed wall furnace - CORRECT ANSWER >>> D What must be done during the installation of a gas log fireplace? A. Make sure there is a metal mesh screen in front of the fireplace B. Secure the chimney damper in the open position C. Install a pressure regulator D. Install a metal chimney liner - CORRECT ANSWER >>> B When can a certified hose be used to connect a construction heater to temporary piping? A. Only if a lever handle shut off valve is installed upstream of the hose B. Only if the hose is 15 feet long C. Never - CORRECT ANSWER >>> A Which of the following is acceptable when a fireplace insert is installed? A. A metal chimney linear B. The existing fireplace flue C. BW vent D. A tile lined fireplace flue? - CORRECT ANSWER >>> A An unvented infra-red heater can be installed in ________ application A. A warehouse B. A commercial building C. An industrial building

The relief valve for a residential low-pressure hot water boiler system should be? A. 14.7 psia B. 15 psia C. 30 psig D. 30 psia - CORRECT ANSWER >>> C A backflow prevent used in a boiler system should be located in the: A. Over flow line connected to the drain B. Return line close to the boiler C. 1/4" line connecting the boiler and cushion tank D. Make up water line to the system - CORRECT ANSWER >>> B Automatic chlorinators must be installed: A. upstream of the heater B. downstream of the heater C. upstream of the filter D. downstream of the filter - CORRECT ANSWER >>> B On seasonal start up, a pool heater should run: A. intermittently B. continuously for 24 hours C. continuously until the thermostat is satisfied D. one hour on and one hour off until the thermostat is satisfied - CORRECT ANSWER >>> C

Before lighting a burner in a steam boiler, ensure that: A. there is water in the boiler B. the temperature controller is set properly C. the main burner test firing valve is turned on D. the safety valves are open - CORRECT ANSWER >>> A The recommended water temperature setting from a mixing valve to the domestic water system in combination heating systems that employ oil-fired water heaters for heating potable water and for space heating is: A. 43°C (110°F) B. 49°C to 54°C (120°F to 130°F) C. 60°C to 66°C (140°F to 150°F) D. 83°C (180°F) - CORRECT ANSWER >>> B An inverted sensor (measures water level) can be found operating what type of appliance? A. Hot water boiler B. Steam water boiler C. Domestic hot water storage tank D. Domestic potable hot water tank - CORRECT ANSWER >>> D A backflow prevent used in a hydronic heating system is used to: A. Keep hot water from entering the cold water system B. Hold the pressure on the system during a temporary shutdown to prevent the entry of air C. Prevent the heating water from circulating the wrong way in the system D. Keep non-combustible water from entering the drinking water system **- CORRECT ANSWER

** D

A fire tube boiler has: A. Water outside the tube and flue gases outside B. Water inside the tubes and flue gasses outside C. Water inside the tubes and water outside D. Water outside the tubes and flue gases inside - CORRECT ANSWER >>> D Why is a pressure relief valve installed on a pool heater system? A. To maintain the pool water level B. To prevent over pressurizing the filter C. To prevent damage to the system D. To relieve excess water pressure caused by solar gun - CORRECT ANSWER >>> C When does an electrically operated automatic vent damper on a mid-efficiency furnace open? A. Before the ignition cycle B. When the furnace is hot C. At the same time as the gas comes on D. When the main switch is turned on - CORRECT ANSWER >>> A What is the minimum distance the vent of a Category 4 furnace with an input under 100, Btuh can terminate from a combustion air inlet of any other appliance? A. 12" B. 36" C. 60" D. 120" - CORRECT ANSWER >>> A If an air conditioning system is added to a heating system, it is recommended that:

A. A smaller blower pulley be installed B. A larger blower pulley be installed C. A larger motor pulley be installed D. A smaller motor pulley be installed - CORRECT ANSWER >>> C If an appliance is less than 83% efficient and non-positive it would be considered a? A. Category II B. Category I C. Category IV D. Category III - CORRECT ANSWER >>> B When is it premissible to vent a Category IV furnace into the sam chimney or vent as a water heater? A. it is always allowed B. it is never allowed C. it is allowed only when a "T" or "Y" fitting is used D. it is allowed only when "B" vent is used - CORRECT ANSWER >>> B When can combination heating systems employing a waterheater be attached to baseboards or radiators that were previously used for boiler heating - CORRECT ANSWER >>> B The minimum allowable distance to be maintained from a 50,000 Btuh water heater flue outlet to grade level is: A. 6" (150mm) B. 12" (300mm) C. 18" (450mm)

C. the dip tube is cracked or broken

D. The temperature sensor is in the wrong location - CORRECT ANSWER >>> A As the outlet temperature decreases from a water heater to the heating loop in a combination 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 air increases D. Greater the temperature drop through the heating loop - CORRECT ANSWER >>> A On a hydronic heater system what control responds to a load change? A. Low water cut off B. Expansion tank C. Flow switch D. Aquastat - CORRECT ANSWER >>> C Which of the hydronic controls listed below de-energizes the main burner if the operating control fails in the closed position? A. Low limit control B. Temperature and pressure relief valve C. High limit control D. Flow switch - CORRECT ANSWER >>> C The purpose of mixing valve on a combination system employing a water heater to provide water for potable use and provide space heating is to A. Mix hot water with cold water in the heating loop B. Mix cold water with the hot water supply to the domestic plumbing system to maintain a consistent temperature of domestic hot water

CORRECT ANSWER >>> B

Why is there a low limit on a hot water tank which supplies both space heating and domestic hot water? A. To prevent rusting in the system B. To prevent freeze up C. To reduce oil consumption D. To assure a constant supply of domestic hot water - CORRECT ANSWER >>> D Is leaded solder allowed on the heating potion of a combination domestic heating/ hot water system? A. Yes B. No - CORRECT ANSWER >>> Yes A forced draft burner has a blower that produces sufficient pressure to overcome the resistance of the: A. burner B. burner and the appliance C. burner and the appliance downdraft D. venting system - CORRECT ANSWER >>> B What materials are approved for joining single wall vent connectors? A. Duct tape B. Pop rivets C. Sheet metal screws D. Silicone or adhesive - CORRECT ANSWER >>> C

How many Btu's are in a US gallon of oil? A. 100, B. 120, C. 140, D. 175,000 - CORRECT ANSWER >>> C A fan assist burner is? A. Designed for better combustion B. Designed for conversion boiler C. Designed to overcome appliance friction D. Designed to overcome burner resistance only - CORRECT ANSWER >>> D When the required minimum clearance for a vent connector is 9" (228 mm) to combustible material with no protection, what is the acceptable method to reduce the clearance by 3" ( mm)? A. use 0.05" (12 mm) insulating millboard spaced out 0.05 (12 mm) with noncombustible spacers B. use 0.25" (6 mm) insulating millboard spaced out 1" (25 mm) C. use 22 gauge sheet metal attached to the hot side of the-combustible material D. use 28 gauge sheet metal spaced out 1" (25 mm) from the combustible material - CORRECT ANSWER >>> B When using a gas detector such as a Drager or Gas Tec type, the most important aspect regarding the sample tube is that the: A. detector is within the manufacturer's date code B. sample tube is within the manufacturer's date code

D. Slow hot flue gases flow - CORRECT ANSWER >>> D A condensing furnace has: A. One heat exchanger B. Operates without a heat exchanger C. Two heat exchangers D. Condensate drain and one exchanger - CORRECT ANSWER >>> C Before lighting a burner in a steam boiler, ensure that: A. there is water in the boiler B. the temperature controller is set properly C. the main burner test firing valve is turned on D. the safety valves are open - CORRECT ANSWER >>> A On seasonal start up, a pool heater should run: A. intermittently B. continuously for 24 hours C. continuously until the thermostat is satisfied D. one hour on and one hour off until the thermostat is satisfied - CORRECT ANSWER >>> C Steel boilers are generally classified as: A. Water tube boilers B. Vapour tube boilers C. Square sectional boilers D. Oval Sectional boilers - CORRECT ANSWER >>> A

Expansion tanks provide a place for: A. Water to cool before returning to the system and pressure to build so the system will operate properly B. Hot water to expand so it will be forced through the system and for steam to be trapped C. Water to travel and allow for pressure fluctuations in the system D. Condensate to collect before it returns to the boiler and a place for steam to expand in the system - CORRECT ANSWER >>> C The device that the water tank uses to direct the incoming water to the lower part of the tank is called? A. Anode rod B. Unitrol C. Dip tube D. Invertube - CORRECT ANSWER >>> C Which of the following instruments is used to check the pressure drop across an indoor coil? A. a velometer B. an inclined manometer C. an anemometer D. a psychrometer - CORRECT ANSWER >>> B What will happen in the furnace if the cooling coil gets too dirty? A. The return air temperature will rise B. The return airflow will increase C. The bonnet temperature will decrease D. The supply airflow will decrease - CORRECT ANSWER >>> D

On a domestic 2 ton air conditioner what would be the minimum volume of air flow (cfm)? A. 750 cfm B. 400 cfm C. 600 cfm D. 800 cfm - CORRECT ANSWER >>> D An adjustable sheave pulley is most commonly used on a: A. Motor shaft B. Variable speed motor C. Blower shaft D. Direct drive motor - CORRECT ANSWER >>> A A fan control: A. shuts the blower off on safety only B. starts the blower when the plenum is up to temperature C. starts and stops the blower D. ensures the burner will not start if overheating occurs - CORRECT ANSWER >>> C If condensation occurs on the inside of the window when the outdoor temperature drops, the humidistat should be? A. Increased B. Set to Zero C. Set to 100% D. Decreased - CORRECT ANSWER >>> D Can a 2 in. diameter round duct be used as combustion supply air to an appliance?

A. Yes B. Yes if total input of appliances exceeds 400,000 BTU C. Yes if ventilation air is at least 10 in square D. No - CORRECT ANSWER >>> A Heat which when added to or removed from a substance causes a change of temperature is: A. superheat B. specific heat C. latent heat D. sensible heat - CORRECT ANSWER >>> D In what section of the B149.1 codebook can you find specs. on a dirt pocket? A. Section # B. Section # C. Section # D. Section #6 - CORRECT ANSWER >>> D What is the closing force of a 2' gas regulator? A. Spring tension B. Operating pressure C. Downstream pressure D. Leak limit orifice - CORRECT ANSWER >>> C Should a high-pressure leak test be performed if a section of more than 20 feet is added to an existing gas piping system? A. Yes