Steam Heating Equipment Flashcards
Radiators are constructed in such a way as to present a \_\_\_\_\_\_ to radiate heat from the steam or hot water contained in the radiator: Small internal volume Large surface area Pleasant appearance Smaller area
Larger surface area
Pack less radios valves have a \_\_\_\_ diaphragm that completely seals off the valve body to prevent steam from leaking out around the valve stem: Copper Bronze Lead Steel
Bronze
The exhauster consists of a series of \_\_\_\_\_\_\_\_through which water is forced by the vacuum pump: Nozzles Centuries Orifices Pipes
Nozzles
The air vent consists of small housing containing a sealed cylinder partially filled with: Volatile liquid Water steam compressed air
Volatile liquid
Unit ventilators are: Cabinet type heaters Ceiling type heaters Floor radiators Ceiling mounted unit heaters Baseboards type heaters
Cabinet type heaters
A radiator valve is used to control the amount of: Air entering the radiator Steam leaving the radiator Steam entering the radiator Condensate leaving the the radiator Air leaving the radiator
Steam entering the radiator
Unlike convectors, unit heaters use what to increase heat transfer? Natural circulation Blowers Brass tubes Copper tubes Metal fins
Blowers
An air vent is partially filled with volatile liquid so that:
The air will flow in one direction
The steam will flow in one direction only
When relatively cool air surrounds the cylinder, it course the needle to open
When relatively cool air surrounds the cylinder, it causes the needle valve to open.
A radiator trap is a device that used to: Depressurize a radiator Allow only steam to leave the radiator Allow only air to leave the radiator Vent steam from the radiator Allow only water to leave the radiator
Allow only water to leave the radiator
Radiators and convectors should be placed:
Against inside walls
In a central location
Close to the boiler
Against outside walls and preferably under windows
In an enclosed area and away from windows
Against outside walls and preferably under windows
Unit ventilators may:
Supply a mixture of hot air and recirculated air
Do all the above
Supply only outside air
Supply a mixture of heated air and outside air
Supply only heated air
Do all the above
In fin coil type heaters, individual room temp is controlled by: Switches Automatic valves Supply ducts Air relays Dampers
Dampers
Reheat could:
Are certainly located forced air units controlled by dampers
Usually serve only one room
Are not suitable for heating large buildings
Are convection devices are not controlled
Are certainly located forced air units controlled by dampers
The level in the condensate receiver is automatically controlled by a: Float switch Sight glass Pressure reducing valve Gate valve Drain valve
Float valve
Convectors use what to increase heat transfer: Brass tubes Copper tubes Blowers Metal fins Radiators
Metal fins
