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What is the setting on a T/P relief valve on a domestic 60-gallon hot water tank?
A. 150 psi and 210°F
B. 125 psi and 180°F
C. 100 psi and 210°F
D. 210 psi and 150°F ---------CORRECT ANSWER-----------------A
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
The majority of the heat loss in a house on average is through the?
A. Attic
B. Walls
C. Basement floor
,D. Windows ---------CORRECT ANSWER-----------------B
Carbon monoxide (CO) is a product of the incomplete combustion of?
A. Oxygen
B. Air
C. Soot
D. Hydrocarbons ---------CORRECT ANSWER-----------------D
What is the ultimate CO2 level for propane gas?
A. 9.9%
B. 10.9%
C. 11.9%
D. 13.9% ---------CORRECT ANSWER-----------------D
Which heat is removed or added to cause a change in state without change in
temperature?
A. Sensible heat
B. Radiant heat
C. Latent heat
D. Super heat ---------CORRECT ANSWER-----------------C
,What would be the minimum area needed to service an appliance?
A. 24 in. x 18 in.
B. 24 in. x 24 in.
C. 36 in. x 36 in.
D. 36 in. x 48 in. ---------CORRECT ANSWER-----------------A
All air filtration devices are generally located in the?
A. Fresh air plenum
B. Return air plenum
C. Supply air plenum
D. Exhaust air plenum ---------CORRECT ANSWER-----------------B
236. A pressure reading of 14.7 psia is equivalent to?
A. 2.35 in w.c.
B. 14 in w.c.
C. 0 psig (gauge '0' is calibrated to atmosphere)
D. 10 psig ---------CORRECT ANSWER-----------------C
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
235. The Celsius reading equivalent to 70°F is?
A. 25°C
B. 18°C
C. 21°C
D. 28°C ---------CORRECT ANSWER-----------------C
234. What would the blower speed be if the motor pulley were twice the
diameter of the blower pulley?
A. Two times the motor speed
B. Equal to the motor speed
C. Half the motor speed
D. Quarter the motor speed ---------CORRECT ANSWER-----------------A
Where should the condensate line of a condensing furnace terminate?
A. On the floor near the drain
B. Outside the building
C. Though the concrete floor
D. To an open floor drain ---------CORRECT ANSWER-----------------D