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hvac

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HVAC/R
Two technicians are discussing the HVAC/R field. Technician A says that industry codes that require certain types of installation practices carry the force of law with them. Technician B says that ANSI is an organization that establishes codes for the HVAC/R field. Which one ...

Math 115
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

Math
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

Math
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

HVAC
How many Ampere of 1 horse power motor?

hvac/r
When antifreeze is added to water specific heat

HVAC
Why must all valves be open when an evacuation is performed?

hvac
what happens to the pressure at locations moving vertically up or down a ph constant-enthalpy line?

hvac
an oil slinger is found in a reciprocating compressor employing what type of lubrication system

Hvac
I have a series circuit with 115 Volta with r16ohmd r2 22ohms r3 44 ohms what is the wattage on r3

hvac
what is the required input in watts to operate a 70 percent efficient three-horsepower electric motor

hvac school
What temp would a fixed volume of gas need to be heated in order to double its pressure if it starts out at 25?

hvac
gas trapped in a reciprocating piston compressors clearance space expands at the beginning of the suction stroke what effect does this have on the system

hvac
compressor cylinger unloading reduces the capacity of a reciprocating compressor by

hvac
what is the difference between fall-prevention and fall-arresting equipment?

hvac
calculate the amount of heat required to change 5 pounds of ice at 32 degrees to water 32 degrees

hvac
when antifreeze is add to water the water specific heat

HVAC / Electrical
what is the total resistance in a circuit having 3 feetof 10 ohm/ft wire, with two 15 ohm resistors wired in parallel?

hvac
if the current is one half ampere when the resistance is 240 ohms, what is the current when the resistance is 540 ohms?

Hvac
3 resistors of 5 ohms,15 ohms, and 30 ohms are connected in series and placed across a 50 volt batt. Find the voltage drops acroos each resistor . And find the current through each resistor

HVAC
A gas is compressed inside a compressors cylinder. When the piston is at its bottom dead center , the gas is initially at 10 psig , 65 degree and 10.5 in. After compression and when the piston is at top dead center the gas is 180 degree and occupies 1.5 in. What would be the ...

Project Mangament
I am doing on a project on Building Home Depot. how would I go to found the cost, construction engineer, roofing contractor, plumbing contractor, HVAC contractor, steel erection and electric contractor. Install temporary power,set up site office, stone site parking area, ...

math
The Ministry of Finance published the FY2009 Tax Reform ( Main Points) on December 19, 2008. Included in the Reform is the introduction of a 2- year measure allowing immediate depreciation for investment in energy- saving facilities and appliances. If this measure doubles the ...

math
The Ministry of Finance published the FY2009 Tax Reform ( Main Points) on December 19, 2008. Included in the Reform is the introduction of a 2- year measure allowing immediate depreciation for investment in energy- saving facilities and appliances. If this measure doubles the ...

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