Questions On Review 21-30 Flashcards
An air handler unit that has hot and cold air ducts connected to molding boxes located in each building space is called a_________air handler unit
Duel duct
Multi zone
Single zone
Terminal reheat
Dual duct
An ir handler unit supplies a constant supply air temperature of 55 degree f to building spaces and includes a coil called_______air handler unit
A vav
An induction
A terminal reheat
A constance volume
A terminal reheat
An air handler unit that provides heating, cooling ventilation and air conditioning to more than one building or area and has its cooling and heating coil in separate side. Y side ducts is called a ________air handler unit
Dual duct
Multi zone
Single zone
Multi zone
In a dual duct air handling system space thermostatic control building temperature by
Resetting the air handler hot and cold duct temperature
Moving the air from hot and cold deck at the air handler
Moving the air from the hot and cold duct in a molding box serving the space
Moving the air from the hot and cold duct in a molding box serving the space
Which of the following is a hanged joint between two or more_____furnace and may be located in the center of the furnace with______than 18 inches an apart
Stay ring
Dish back
Morrison ring
Adamson ring
Adamson ring
What is not advantage of an economic boiler over a conventional HRT boiler
Space, ability to increase capacity, flexibility
More brick needed
Can be shipped as a unit
More heating square foot
Space, ability to increase capacity, flexibility
What controls the steam pressure and monitores the combustion air intake
Discrete, analog, and ddc
Analog
Fuel air water
Fuel air water
How and why tube ends on fire boiler are secure
Tube ends are flare to keep them pulling apart
Tube ends are flare to provide more efficiency water circulation
Tube ends are beaded to allow for greater expansion and control the tubes
Tube ends are beaded to allow for greater expansion and control the tubes
What is not an advantage of the economic type boiler over the conventional type boiler
Required amounts of brickwork is less
Boiler may be shipped as a complete unit
Allows greater flexibility expansion and contraction
Allows greater flexibility expansion and contraction
An accelerated circulation water tube in one characterize by
A booster pump
Heated down comer
External down comers
Internal circulation
Heated down comer
