Skills and Trades

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Compared to hot water heating coils, steam heating coils are A) Mostly plastic materials rather ... Started by crobinson2013	1 Replies 70 Views	Jul 26, 2018 by scikid
Split system heat pumps normally come with enough refrigerant for A) the outdoor unit and indoor ... Started by lracut11	1 Replies 62 Views	Jul 26, 2018 by emily12345
The major components of an air handling unit include A) Heating and cooling coils and electric ... Started by MGLQZ	1 Replies 37 Views	Jul 26, 2018 by katara
How can air be removed from a newly installed ground loop? A) by purging the loop with nitrogen ... Started by haleyc112	3 Replies 16 Views	Jul 26, 2018 by fatboyy09
During the initial startup of a geothermal water source heat pump, when should the water flow be ... Started by bobbie	1 Replies 38 Views	Jul 26, 2018 by jsm54321
The best way to remove a belt from a belt drive is to A) Loosen the mount on the drive pulley to ... Started by iveyjurea	1 Replies 80 Views	Jul 26, 2018 by ladyjames123
When low voltage thermostat wire is run through the roof to the conditioned space the thermostat ... Started by jparksx	1 Replies 73 Views	Jul 26, 2018 by cclemon1
AMCA fan performance classifications are based on A) The physical design of the fan wheel B) the ... Started by renzo156	3 Replies 17 Views	Jul 26, 2018 by amandanbreshears
In order to double fan RPM, the motor horsepower A) Must increase by a factor of 4 (2 2 ) B) ... Started by Tirant22	1 Replies 22 Views	Jul 26, 2018 by sabina576
To minimize the buildup of dangerous levels of static electricity in industrial processes, ... Started by a0266361136	1 Replies 61 Views	Jul 26, 2018 by IAPPLET
Rooftop units can have the ductwork connected to either A) the bottom or top of the unit B) the ... Started by bobbie	1 Replies 126 Views	Jul 26, 2018 by laurnthompson
Which of the following materials has the highest R value per inch of thickness? A) Rigid foam ... Started by saraeharris	3 Replies 21 Views	Jul 26, 2018 by debra928
Common materials used for insulation in residential construction are A) Fiberglass, cellulose, ... Started by ARLKQ	1 Replies 47 Views	Jul 26, 2018 by kusterl
Where should the vapor barrier be placed when insulating walls? A) towards the outer wall B) ... Started by nevelica	1 Replies 31 Views	Jul 26, 2018 by helenmarkerine
A multi-zone system allows a wide range of temperatures in different zones supplied by a single unit ... Started by mckennatimberlake	1 Replies 26 Views	Jul 26, 2018 by nhea
Air is removed from chilled water lines and coils A) By evacuating the lines and coils with a ... Started by j.rubin	3 Replies 61 Views	Jul 26, 2018 by yotaSR5
What does the low temperature thermostat do? A) it starts the system when the temperature outside ... Started by Lisaclaire	1 Replies 27 Views	Jul 26, 2018 by meganlapinski
Larger tonnage refrigerant units use which kinds of chillers? A) reciprocating and scroll ... Started by Zulu123	1 Replies 65 Views	Jul 26, 2018 by kalskdjl1212
Traditional methods of capacity control for centrifugal compressors include A) Adjustable pitch ... Started by yoroshambo	1 Replies 34 Views	Jul 26, 2018 by ttt030911
Balancing valves are required A) to create negative pressure. B) to allow adjustable flow. C) on ... Started by pepyto	3 Replies 43 Views	Jul 26, 2018 by cici
Mixing valves used to control the final temperature of radiant loops A) by mixing the hot boiler ... Started by jazziefee	1 Replies 38 Views	Jul 26, 2018 by lkanara2
Most hydronic heating systems are A) Open systems in cooling and closed systems in heating B) ... Started by tingc95	1 Replies 80 Views	Jul 26, 2018 by bfulkerson77
Gravity must be taken into consideration when choosing a circulating pump for A) An open piping ... Started by JGIBBSON	1 Replies 31 Views	Jul 26, 2018 by jesse.fleming
You will never see a pump with a profile of A) low pressure and high flow. B) high pressure and ... Started by RODY.ELKHALIL	3 Replies 59 Views	Jul 26, 2018 by Jossy
Radiant floor heating systems typically operate at temperatures of A) 280F to 300F B) 200F to ... Started by vicky	1 Replies 54 Views	Jul 26, 2018 by momolu