Chapter 2 Steam Heating Equipment Flashcards
1.Modern radiators are made of:
A. Cast iron
B. Aluminum
C. Light steel pressings welded together
D. Magnesium
E. Copper
C. Light steel pressings welded together
- In buildings covering large areas the resistance to flow of the condensate in the return piping is quite high and _____ pumps are often used to assist the condensate flow.
A. Positive displacement
B. Lobe
C. Centrifugal
D. Vacuum
E. Turbine
D. Vacuum
- The presence of air in a steam heating system is undesirable since it will:
A. Increase the steam flow
B. Decrease the condensate flow
C. Increase the heat transfer
D. Increase the condensate load
E. Block the free flow of steam
E. Block the free flow of steam
- A fin coil consists of one or more rows of parallel tubes fitted with fins to _____ exchange.
A. Decrease the rate of heat
B. Increase the rate of heat
C. Increase the temperature
D. Decrease the temperature
E. Increase the flow rate
B. Increase the rate of heat
- Some heat is also _____ from the warm convector cabinet surface.
A. Conducted
B. Ventilated
C. Humidified
D. Constructed
E. Radiated
E. Radiated
- A unit ventilator may also be called a:
A. Unicorn
B. Radiator
C. Univent
D. Convector
E. Fin coil
C. Univent
- Packless radiator valves have a _____ diaphragm that completely seals off the valve body to prevent steam from leaking out around the valve stem.
A. Copper
B. Steel
C. Lead
D. Bronze
E. Plastic
D. Bronze
- In a steam heating system the steam gives up its _____ within the radiators, convectors and coils.
A. Latent heat
B. High temperature
C. Sensible
D. Enthalpy
E. Entropy
A. Latent heat
- The presence of air in a steam heating system is undesirable since it will:
A. Decrease the condensate pressure
B. Promote corrosion in the system
C. Increase heat transfer beyond design
D. Increase the steam flow
E. Contaminate the makeup water
B. Promote corrosion in the system
- Older radiators were made of cast iron and built in sections which were connected by means of:
A. Clamps
B. Screw or push nipples
C. Tie rods
D. Bolts
E. Welded flanges
B. Screw or push nipples
- In modern installations the cast-iron radiator has largely been replaced by the:
A. Ventilator
B. Convector
C. Unit heater
D. Space heater
E. Hot air furnace
B. Convector
- Radiators may be classified as _____ type.
A. Wall-hung
B. Flooded
C. Airless
D. Horizontal
E. Vertical
A. Wall-hung
- '’Radiators’’ may be classified as _____ type.
A. Horizontal
B. Flooded
C. Vertical
D. Airless
E. Window
E. Window
- Radiators may be classified as _____ type.
A. Horizontal
B. Airless
C. Flooded
D. Floor
E. Vertical
D. Floor
- A unit heater is a convector heater that employs _____ to force the air across the heating coil.
A. A blower or fan
B. A pump
C. A turbocharger
D. Natural convection
E. Differential pressure
A. A blower or fan
- The type of trap commonly used with radiators or convectors is the _____ trap with either corrugated bellows or disc.
A. Thermodynamic
B. Thermostatic
C. Inverted bucket
D. Ball float
E. Impulse
B. Thermostatic
- The presence of air in a steam heating system is undesirable since it will:
A. Decrease the condensate pressure
B. Promote corrosion in the system
C. Increase heat transfer beyond design
D. Increase the steam flow
E. Contaminate the makeup water
B. Promote corrosion in the system
- In the convector air circulates naturally without the aid of a fan a process that is called:
A. Conduction
B. Ventilation
C. Humidification
D. Convection
E. Radiation
- The radiator trap is a device that allows the condensate to be discharged from the radiator but prevents any _____ from discharging.
A. Steam
B. Air
C. Carbon dioxide
D. Non-condensable gases
E. Condensate
A. Steam
- The presence of air in a steam heating system is undesirable since it will:
A. Reduce the heat transfer
B. Decrease the condensate flow
C. Cause the relief valve to fail
D. Increase the steam flow
E. Reduce the operating pressure
A. Reduce the heat transfer
