Skills and Trades

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The different types of terminal units used for hot water heating systems include: A) Baseboard ... Started by amal	1 Replies 37 Views	Jul 24, 2018 by Ahnyah
Newer-style gun burners with special air-handling parts should be set in what range of CO2 ... Started by melina_rosy	3 Replies 24 Views	Jul 24, 2018 by abctaiwan
Key safety aspects that should be checked during a planned maintenance service call for any ... Started by bobbie	1 Replies 103 Views	Jul 24, 2018 by mcomstock09
The fluid circulated through the water coil of a geothermal heat pump system: A) Is circulated ... Started by jace	1 Replies 37 Views	Jul 24, 2018 by fwbard
What is the purpose of checking the supply voltage before operating the system? A) To determine ... Started by LaDunn	1 Replies 99 Views	Jul 24, 2018 by aruss1303
What friction rate should be used to size a duct for a design friction rate of 0.12 in WC if the ... Started by BRWH	3 Replies 30 Views	Jul 24, 2018 by chloejackso
Geothermal heat pumps get most of their heat from: A) The ground. B) The surrounding air. C) A ... Started by maychende	1 Replies 91 Views	Jul 24, 2018 by kiamars2010
Which type of duct undergoes more rigorous testing before it is labeled? A) Flexible duct ... Started by sam.t96	1 Replies 53 Views	Jul 24, 2018 by vkodali
The temperature of the ground stays nearly constant at any depth below: A) 4 feet. B) 28 feet. ... Started by jenna1	1 Replies 100 Views	Jul 24, 2018 by Dnite
The voltage drop in the power wire is checked by: A) Reading the voltage before the unit starts ... Started by misspop	3 Replies 51 Views	Jul 24, 2018 by mjenn52
Which style of burner usually operates with a higher flue gas CO2 percentage? A) Older gun ... Started by audie	1 Replies 84 Views	Jul 24, 2018 by fffftttt
What is the purpose of the expansion tank? A) To provide pressure for the water system B) To ... Started by Mimi	1 Replies 51 Views	Jul 24, 2018 by JYan
The equivalent length of the runs in a residential house will often be how long? A) 10 ft B) 100 ... Started by sheilaspns	1 Replies 50 Views	Jul 24, 2018 by strudel15
What does the equivalent length of a duct fitting mean? A) It is a factor that allows comparison ... Started by PhilipSeeMore	3 Replies 14 Views	Jul 24, 2018 by leahm14
A closed-loop system is practical only when: A) There is an adequate supply of water, it is of ... Started by shofmannx20	1 Replies 301 Views	Jul 24, 2018 by bitingbit
How does performing planned maintenance save the customer money? A) The customer will receive ... Started by bobbie	1 Replies 38 Views	Jul 24, 2018 by Missbam101
What is used to clean the surfaces of the heat exchanger? A) Razor blade B) Abrasive sponge C) ... Started by Mr3Hunna	1 Replies 156 Views	Jul 24, 2018 by lkoler
What can cause the supply voltage to an electric heating system to drop below the minimum voltage ... Started by fagboi	3 Replies 48 Views	Jul 24, 2018 by TheNamesImani
When comparing duct materials, none have a lower friction rate or are as durable as: A) Sheet ... Started by casperchen82	1 Replies 132 Views	Jul 24, 2018 by srodz
A water-source system that recirculates water in pipes buried in the ground is: A) Considered a ... Started by saraeharris	1 Replies 44 Views	Jul 24, 2018 by sylvia
A belt that vibrates and jumps around while operating can most likely be corrected by: A) ... Started by aabwk4	1 Replies 9 Views	Jul 24, 2018 by lou
What components on an oil furnace should be changed annually? A) The fuel-line filter and the ... Started by darbym82	3 Replies 9 Views	Jul 24, 2018 by sarah_brady415
In a one-pipe venturi system: A) Only part of the water flows through each convector in the loop. ... Started by NClaborn	1 Replies 139 Views	Jul 24, 2018 by carolinefletcherr
The effects of moisture in the refrigeration system are which of the following? You may select more ... Started by genevieve1028	1 Replies 254 Views	Jul 24, 2018 by whitcassie
If combustion air openings pass through vertical ducts with 4,000 BTU input, how large should the ... Started by MGLQZ	1 Replies 14 Views	Jul 24, 2018 by TheNamesImani