Skills and Trades

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When checking combustion efficiency, which measurement should be taken first? A) Draft B) Smoke ... Started by Pea0909berry	1 Replies 27 Views	Jul 24, 2018 by fdliggud
To avoid freezing the water in the chiller during recovery: A) Circulate the chiller water. B) ... Started by SAVANNAHHOOPER23	1 Replies 47 Views	Jul 24, 2018 by flexer1n1
The most common times to perform a seasonal check on heating equipment are in the: A) Winter. B) ... Started by student77	3 Replies 144 Views	Jul 24, 2018 by vickybb89
Duct systems are designed to provide conditioned air that matches: A) The needs of the structure. ... Started by future617RT	1 Replies 14 Views	Jul 24, 2018 by mbcrismon
As the refractory temperature increases, the combustion efficiency: A) Stays the same. B) ... Started by haleyc112	1 Replies 60 Views	Jul 24, 2018 by Meganchabluk
Why does the lithium bromide and water solution go through a heat exchanger? A) To use the ... Started by soccerdreamer_17	1 Replies 13 Views	Jul 24, 2018 by Jbrasil
When testing combustion efficiency, the technician should measure: A) Stack temperature, ambient ... Started by mmm	3 Replies 87 Views	Jul 24, 2018 by aidanmbrowne
How does the water vapor from the lithium bromide solution return to the evaporator? A) It ... Started by EAugust	1 Replies 21 Views	Jul 24, 2018 by Bsand8
Solar heat gain is considered when calculating: A) The heat gain on all the house surfaces. B) ... Started by viki	1 Replies 40 Views	Jul 24, 2018 by amynguyen1221
The flow resistance through the heat exchanger of an oil furnace is frequently increased because of: ... Started by darbym82	1 Replies 53 Views	Jul 24, 2018 by ndhahbi
Absorption chillers move refrigerant using: A) Large centrifugal compressors. B) Heat from steam, ... Started by shofmannx20	3 Replies 22 Views	Jul 24, 2018 by scrocafella
How is a temperature-pressure relief valve on a hot-water boiler tested? A) Jump the high limit ... Started by pragya sharda	1 Replies 58 Views	Jul 24, 2018 by orangecrush
What advantage is there to maintaining a negative pressure on the heat exchanger? A) The vent ... Started by 123654777	1 Replies 45 Views	Jul 24, 2018 by lkanara2
The air in a duct system should be distributed based upon: A) The square footage of the rooms. ... Started by CORALGRILL2014	1 Replies 54 Views	Jul 24, 2018 by mcni194
What do modern hydronic systems use to circulate the hot water? A) Gravity B) Pumps C) Fans D) ... Started by evelyn o bentley	3 Replies 31 Views	Jul 24, 2018 by reelove4eva
You are using the static pressure drop method to check airflow. After making an adjustment to the ... Started by tth	1 Replies 54 Views	Jul 24, 2018 by mfedorka
Why do closed hydronic systems include pressure-relief valves, expansion tanks, and temperature and ... Started by maegan_martin	1 Replies 44 Views	Jul 24, 2018 by ilianabrrr
The formula for determining the static available for the duct system is: A) Available duct static ... Started by Lobcity	1 Replies 97 Views	Jul 24, 2018 by emsimon14
What is the net stack temperature? A) The temperature difference between the over-fire ... Started by jilianpiloj	3 Replies 115 Views	Jul 24, 2018 by nathang24
What is the purpose of checking the supply voltage after starting the system? A) To determine ... Started by newyorker26	1 Replies 40 Views	Jul 24, 2018 by karlss
What must be used to test the output of the ignition transformer? A) High-voltage probe B) ... Started by MGLQZ	1 Replies 78 Views	Jul 24, 2018 by chem1s3
Compared to the over-fire draft, the stack draft should be: A) More negative than the over-fire ... Started by gonzo233	1 Replies 98 Views	Jul 24, 2018 by chem1s3
What is a hydronic terminal unit? A) The coils and devices that heat the building B) The last ... Started by Kthamas	3 Replies 52 Views	Jul 24, 2018 by qytan
What is the total available static pressure for the ductwork in a system with the following ... Started by debasdf	1 Replies 8 Views	Jul 24, 2018 by moormoney
What is the purpose of excess combustion air? A) Excess air improves the over-fire draft. B) ... Started by Destiiny22	1 Replies 45 Views	Jul 24, 2018 by ciecieme