PE 108 4B 108 Electric Controls for Heating
Systems | Questions with Answers Verified 100%
Correct
Contacts that complete an Electric circuits when a relay is DE-ENERGIZED are refered to as
_____________
NORMALLY CLOSED CONTACTS complete electric circuits when a relay is _________
What kind of Thermostat usually controls the temperature of air in ducts?
Remote Bulb Thermostats usually control the temperature of air in ducts
Modulating Thermostats are used...
Where On and Off Switches can not be used. . .
Multi-Position Thermostats . . .
.... are equipped with 2 or more switches
Electrical Pressure controllers come in two classes? Name them
High Pressure Controllers
(measured in KPa or mm of mercury),
Low Pressure Controllers (measure in mm of of water)
List as many examples of Controlled Electrical Devices in a Heating system that you can.
Valves (fuel for example),Electric Relays, Electric Radiator Valves, 3 Way Mixing Valves, 3 way
diverter valves, Damper Motors
Electric Radiator Valves....
... used for on off steam or water control on Radiators or Convectors
Motor Operated Valves are used...
...where "tight shut off"is required
, 3 way v/vs are used with a modulating motor for which 2 types of service?
Mixing and Diverting Service.
Name 2 uses for control motors in an Electrical operated Heating system
Motors for Valve Operation &
Motors for Damper Operation
An advantage of an electric control system over pneumatic system is that:
A) Controllers can have a wide variety of inputs
B) Provide Better Control
C) They are simpler and easier to install
D) The controllers can be used outdoors
The biggest advantage of electrical control over pneumatic control in heating systems is that
the wiring is easier and more simple to install
In a capacitor type electrical control motor, The rotor and gear train are sealed inside a
housing that is partially filled with:
A) Air B) Oil C) Antifreeze D)Refrigerant
Capacitor type electrical control motor, The rotor and gear train are sealed inside a housing
that is partially filled with Oil
Which of the following types of switching devices are used in conjunction with bi metal strips
to control electrical circuits?
A) Open Contacts B) Mercury Bulb
C) Snap Switch D) All of the above
Open Contacts, Mercury bulbs, snap switches can all be used into conjunction with bi metal
strips to control electrical circuits.
A heat anticipator gives a thermostat timed ________position action to prevent the room
temperature from overshooting
A) single B) 2 C) 3 D)multiple
Systems | Questions with Answers Verified 100%
Correct
Contacts that complete an Electric circuits when a relay is DE-ENERGIZED are refered to as
_____________
NORMALLY CLOSED CONTACTS complete electric circuits when a relay is _________
What kind of Thermostat usually controls the temperature of air in ducts?
Remote Bulb Thermostats usually control the temperature of air in ducts
Modulating Thermostats are used...
Where On and Off Switches can not be used. . .
Multi-Position Thermostats . . .
.... are equipped with 2 or more switches
Electrical Pressure controllers come in two classes? Name them
High Pressure Controllers
(measured in KPa or mm of mercury),
Low Pressure Controllers (measure in mm of of water)
List as many examples of Controlled Electrical Devices in a Heating system that you can.
Valves (fuel for example),Electric Relays, Electric Radiator Valves, 3 Way Mixing Valves, 3 way
diverter valves, Damper Motors
Electric Radiator Valves....
... used for on off steam or water control on Radiators or Convectors
Motor Operated Valves are used...
...where "tight shut off"is required
, 3 way v/vs are used with a modulating motor for which 2 types of service?
Mixing and Diverting Service.
Name 2 uses for control motors in an Electrical operated Heating system
Motors for Valve Operation &
Motors for Damper Operation
An advantage of an electric control system over pneumatic system is that:
A) Controllers can have a wide variety of inputs
B) Provide Better Control
C) They are simpler and easier to install
D) The controllers can be used outdoors
The biggest advantage of electrical control over pneumatic control in heating systems is that
the wiring is easier and more simple to install
In a capacitor type electrical control motor, The rotor and gear train are sealed inside a
housing that is partially filled with:
A) Air B) Oil C) Antifreeze D)Refrigerant
Capacitor type electrical control motor, The rotor and gear train are sealed inside a housing
that is partially filled with Oil
Which of the following types of switching devices are used in conjunction with bi metal strips
to control electrical circuits?
A) Open Contacts B) Mercury Bulb
C) Snap Switch D) All of the above
Open Contacts, Mercury bulbs, snap switches can all be used into conjunction with bi metal
strips to control electrical circuits.
A heat anticipator gives a thermostat timed ________position action to prevent the room
temperature from overshooting
A) single B) 2 C) 3 D)multiple
