Skills and Trades

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The typical heat pump defrost termination temperature is A) 55F B) 32F C) 28F D) ... Started by BrownTown3	1 Replies 50 Views	Jul 27, 2018 by adf223
The typical heat pump defrost initiation temperature is A) 28F B) 32F C) 90F D) ... Started by vHAUNG6011	1 Replies 41 Views	Jul 27, 2018 by chem1s3
On a dual fuel heat pump, why does the heat pump outdoor unit normally shut off when the furnace ... Started by danielfitts88	1 Replies 115 Views	Jul 27, 2018 by jonathanballen97
When is the air coil in a water source heat pump the acting evaporator? A) in the cooling cycle ... Started by jman1234	3 Replies 180 Views	Jul 27, 2018 by bobsmith
A closed-loop system is practical only when A) there is an adequate supply of water, it is of ... Started by iveyjurea	1 Replies 215 Views	Jul 27, 2018 by kaykay69
Residential air conditioning refers to air conditioning applied to A) industrial plants B) office ... Started by khang	1 Replies 252 Views	Jul 27, 2018 by jordangronback
Semi-hermetic compressors on large commercial AC units use ________ to stage the compressor by ... Started by leo leo	1 Replies 53 Views	Jul 27, 2018 by Hdosisshsbshs
Given the following readings from an electric furnace, use the formula to calculate airflow. CFM ... Started by ssal	3 Replies 32 Views	Jul 27, 2018 by daiying98
What is the EER of a PTAC unit with an output of 12,000 Btu/hr and 1000 watts input when operated at ... Started by berenicecastro	1 Replies 18 Views	Jul 27, 2018 by lolol
In general, air source heat pumps are sized to meet A) The building heating capacity B) ... Started by TVarnum	1 Replies 34 Views	Jul 27, 2018 by ttt030911
The balance point of an air source heat pump Is the temperature at which A) the system low side ... Started by fbq8i	1 Replies 35 Views	Jul 27, 2018 by Jody Vaughn
The auxiliary drain pan should A) 1 larger than the primary drain dimensions B) be piped into ... Started by fox	3 Replies 31 Views	Jul 27, 2018 by asware1
The primary and auxiliary drain lines should be A) piped separately B) run level to assure an ... Started by yoroshambo	1 Replies 27 Views	Jul 27, 2018 by Zack0mack0101@yahoo.com
Hot water is circulated through a hot water heating system A) Because of the density difference ... Started by DelorasTo	1 Replies 58 Views	Jul 27, 2018 by yahahah24021
What advantage do hot water heating coils have over steam heating coils? A) They are easier to ... Started by sc00by25	1 Replies 39 Views	Jul 27, 2018 by frre432
A central station air handling unit A) Is used for large systems and is assembled on site using ... Started by Sportsfan2111	3 Replies 23 Views	Jul 27, 2018 by leannegxo
The three common types of axial fans are A) Clockwise, counterclockwise, and oscillating B) Box ... Started by justinmsk	1 Replies 25 Views	Jul 27, 2018 by blakcmamba
What type of refrigerant line connections are used on multisplit systems? A) Single set of ... Started by bucstennis@aim.com	1 Replies 32 Views	Jul 27, 2018 by Jsherida
Compared to a centrifugal fan, an axial fan is generally A) Noisier B) About the same noise ... Started by waynest	1 Replies 15 Views	Jul 27, 2018 by cam1229
To use a fan curve, you need to know A) the CFM and the RPM B) the required CFM and the static ... Started by bclement10	3 Replies 9 Views	Jul 27, 2018 by cam1229
Codes relating to rooftop installation include A) Uniform Mechanical code, International ... Started by go.lag	1 Replies 78 Views	Jul 27, 2018 by srodz
The electrical disconnect box for a rooftop unit A) is mounted on the unit B) is not required for ... Started by cagreen833	1 Replies 83 Views	Jul 27, 2018 by djofnc
A crucial requirement whenever a rooftop installation is considered is A) A power drop can be ... Started by CBme	1 Replies 111 Views	Jul 27, 2018 by gstein359
Which of the following is NOT a type of indoor unit used on mini-split systems? A) Crawl space B) ... Started by audragclark	3 Replies 125 Views	Jul 27, 2018 by ngr69
The condensate drain on a rooftop unit A) Does not require any type of drain line B) must ... Started by 809779	1 Replies 138 Views	Jul 27, 2018 by yasmina