Book 2: 1-02 - "Steam Heating Equipment" Flashcards
The presence of air in a steam heating system is undesirable since it will:
Select one:
A. Decrease the condensate flow
B. Increase the condensate load
C. Increase the heat transfer
D. Block the free flow of steam
E. Increase the steam flow
D. Block the free flow of steam
The type of trap commonly used with radiators or convectors is the _____ trap with either corrugated bellows or disc.
Select one:
A. Thermodynamic
B. Thermostatic
C. Ball float
D. Inverted bucket
E. Impulse
B. Thermostatic
The radiator trap is a device that allows the condensate to be discharged from the radiator but prevents any _____ from discharging.
Select one:
A. Carbon dioxide
B. Steam
C. Condensate
D. Non-condensable gases
E. Air
B. Steam
A unit heater is a convector heater that employs _____ to force the air across the heating coil.
Select one:
A. Differential pressure
B. A pump
C. A turbocharger
D. A blower or fan
E. Natural convection
D. A blower or fan
In many steam heating systems the condensate discharged by the steam traps from the heating equipment drains by gravity into a:
Select one:
A. Deaerator
B. Sump
C. Hotwell
D. Drain
E. Condensate receiver
E. Condensate receiver
Radiators may be classified as _____ type.
Select one:
A. Vertical
B. Airless
C. Horizontal
D. Floor
E. Flooded
D. Floor
The presence of air in a steam heating system is undesirable since it will:
Select one:
A. Cause the relief valve to fail
B. Reduce the heat transfer
C. Increase the steam flow
D. Reduce the operating pressure
E. Decrease the condensate flow
B. Reduce the heat transfer
A unit ventilator may also be called a:
Select one:
A. Univent
B. Convector
C. Unicorn
D. Radiator
E. Fin coil
A. Univent
Radiators may be classified as _____ type.
Select one:
A. Flooded
B. Vertical
C. Airless
D. Horizontal
E. Window
E. Window
The exhauster consists of a series of _____ through which water is forced by the vacuum pump.
Select one:
A. Nozzles
B. Orifices
C. Pipes
D. Orifices
E. Venturis
A. Nozzles
In the convector air circulates naturally without the aid of a fan a process that is called:
Select one:
A. Convection
B. Conduction
C. Ventilation
D. Radiation
E. Humidification
A. Convection
The air vent consists of a small housing containing a sealed cylinder that is partially filled with _____, to which a needle valve is attached.
Select one:
A. Air
B. Oil
C. Water
D. A volatile liquid
E. Steam
D. A volatile liquid
In modern installations the cast-iron radiator has largely been replaced by the:
Select one:
A. Space heater
B. Hot air furnace
C. Unit heater
D. Ventilator
E. Convector
E. Convector
Modern radiators are made of:
Select one:
A. Cast iron
B. Aluminum
C. Magnesium
D. Light steel pressings welded together
E. Copper
D. Light steel pressings welded together
Unit ventilators are often equipped with three-speed switches used to regulate the:
Select one:
A. Flow of the water
B. Rate of ventilation
C. Position of the damper
D. Speed of the fan
E. Flow of the steam
D. Speed of the fan
Older radiators were made of cast iron and built in sections which were connected by means of:
Select one:
A. Bolts
B. Tie rods
C. Screw or push nipples
D. Welded flanges
E. Clamps
C. Screw or push nipples
Some heat is also _____ from the warm convector cabinet surface.
Select one:
A. Radiated
B. Conducted
C. Humidified
D. Ventilated
E. Constructed
A. Radiated
The presence of air in a steam heating system is undesirable since it will:
Select one:
A. Increase heat transfer beyond design
B. Promote corrosion in the system
C. Contaminate the makeup water
D. Increase the steam flow
E. Decrease the condensate pressure
B. Promote corrosion in the system
Attached to the tube of the convector are metal fins that serve to _____ transfer from the tube to the air circulating passed the convector.
Select one:
A. Restrict air
B. Increase the heat
C. Decrease the heat
D. Increase the temperature
E. Decrease the temperature
B. Increase the heat
Packless radiator valves have a _____ diaphragm that completely seals off the valve body to prevent steam from leaking out around the valve stem.
Select one:
A. Bronze
B. Steel
C. Copper
D. Lead
E. Plastic
A. Bronze
