Steam Heating Equipment Flashcards
Unit ventilators are:
A) Ceiling mounted unit heaters B) Floor radiators C) Ceiling suspended unit heaters D) Cabinet type heaters E) Baseboard type heaters
D) Cabinet type heaters
A radiator valve is used to control the amount of:
A) Air entering the radiator B) Condensate leaving the radiator C) Steam entering the radiator D) Air leaving the radiator E) Steam leaving the radiator
C) Steam entering the radiator
Unlike convectors, unit heaters use what to increase heat transfer?
A) Copper tubes B) Natural circulation C) Blowers D) Brass tubes E) Metal fins
C) Blowers
An air vent is partially filled with volatile liquid so that:
A) When hot steam surrounds the cylinder, it causes the needle valve to open
B) The steam will flow in one direction only
C) When relatively cool air surrounds the cylinder, it causes the needle valve to open
D) When relatively cool air surrounds the cylinder, it causes the needle valve to close
E) The air will flow in one direction only
C) When relatively cool air surrounds the cylinder, it causes the needle valve to open
A radiator trap is a device that is used to:
A) Allow only steam to leave the radiator
B) Depressurize a radiator
C) Allow only air to leave the radiator
D) Vent steam from the radiator
E) Allow only water to leave the radiator
E) Allow only water to leave the radiator
Radiators and convectors should be placed:
A) Close to the boiler
B) Against outside walls and preferably under windowsC) Against inside walls
D) In an enclosed area and away from windows
E) In a central location
B) Against outside walls and preferably under windowsC) Against inside walls
Unit ventilators may:
A) Supply a mix of heated air and outside air
B) Supply a mix of heated air, outside air and recirculated air
C) Do all the above
D) Supply only outside air
E) Supply only heated air
C) Do all the above
In fin coil type heaters, individual room temperature is controlled by:
A) Supply ducts B) Automatic valves C) Switches D) Dampers E) Air relays
D) Dampers
The packless radiator valve has a bronze diaphragm that completely seals off the valve body to prevent:
A) Air from leaking out around the valve stem
B) Air from entering the radiator
C) Steam pressure from become excessive
D) Condensate collecting on the valve body
E) Steam from leaking out around the valve stem
E) Steam from leaking out around the valve stem
Reheat coils:
A) Usually serve only one room
B) Are not controlled
C) Are not suitable for heating large buildings
D) Are convection devices
E) Are centrally located forced air units controlled by dampers
E) Are centrally located forced air units controlled by dampers
The level in the condensate receiver is automatically controlled by a:
A) Gate valve B) Pressure reducing valve C) Float switch D) Sight glass E) Drain valve
C) Float switch
Convectors use _____ to increase heat transfer.
A) Radiators B) Blowers C) Metal fins D) Brass tubes E) Copper tubes
C) Metal fins
