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Power Engineering B2 Final Study
Exam Questions And Verified Answers
\Q\.A room thermostat should be mounted on an inside wall about:
A)0.5 m above the floor
B)0.75 m above the floor
C)1.0 m above the floor
D)1.25 m above the floor
E)1.5 m above the floor - ANSWERS✔-1.5m above (E)
\Q\.In an immersion thermostat, what physically operates the switch?
A)
a change in temperature of the controlled medium
B)
an increase in voltage in the sensing element
C)
the expansion/contraction of the liquid in the sensing bulb
D)
the free end movement of the bimetal strip
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E)
an electric signal from the controller - ANSWERS✔-C
\Q\.Which of the following is true of multi-position thermostats?
A)
they sense liquid temperature
B)
they are similar to a modulating thermostat
C)
they have two or more switches
D)
they should be installed near warm air outlets
E)
they operate on a varying 1-20 mAmp signal - ANSWERS✔-c
\Q\.An example of a controlled device would be:
A)
a damper motor operating air louvers
B)
a hot water boiler
C)
a radiator
D)
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a steam boiler
E)
a thermostat - ANSWERS✔-a
\Q\.A device used to change AC voltage from one value to another is termed:
A)
a relay
B)
a linkage
C)
a transformer
D)
an actuator
E)
a controller - ANSWERS✔-c
\Q\.What is the result of the expansion of the dissimilar strips in a bimetal thermostat?
A)
the room temperature will rise
B)
the room temperature will fall
C)
the electrical contacts will close
D)
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the electrical contacts will open
E)
the resistance of the contacts decreases - ANSWERS✔-d
\Q\.What kind of sensing element is in a duct thermostat?
A)
a bi-metal strip
B)
a liquid filled sensing bulb
C)
a thermocouple
D)
a hygroscopic element
E)
a heat anticipator - ANSWERS✔-a
\Q\.Where should thermostats be located?
1. near warm air outlets
2. interior walls
3. outside walls
4. in the path of natural air circulation
A)1, 2
B)2, 3
C)3, 4
Power Engineering B2 Final Study
Exam Questions And Verified Answers
\Q\.A room thermostat should be mounted on an inside wall about:
A)0.5 m above the floor
B)0.75 m above the floor
C)1.0 m above the floor
D)1.25 m above the floor
E)1.5 m above the floor - ANSWERS✔-1.5m above (E)
\Q\.In an immersion thermostat, what physically operates the switch?
A)
a change in temperature of the controlled medium
B)
an increase in voltage in the sensing element
C)
the expansion/contraction of the liquid in the sensing bulb
D)
the free end movement of the bimetal strip
,2|Page
E)
an electric signal from the controller - ANSWERS✔-C
\Q\.Which of the following is true of multi-position thermostats?
A)
they sense liquid temperature
B)
they are similar to a modulating thermostat
C)
they have two or more switches
D)
they should be installed near warm air outlets
E)
they operate on a varying 1-20 mAmp signal - ANSWERS✔-c
\Q\.An example of a controlled device would be:
A)
a damper motor operating air louvers
B)
a hot water boiler
C)
a radiator
D)
,3|Page
a steam boiler
E)
a thermostat - ANSWERS✔-a
\Q\.A device used to change AC voltage from one value to another is termed:
A)
a relay
B)
a linkage
C)
a transformer
D)
an actuator
E)
a controller - ANSWERS✔-c
\Q\.What is the result of the expansion of the dissimilar strips in a bimetal thermostat?
A)
the room temperature will rise
B)
the room temperature will fall
C)
the electrical contacts will close
D)
, 4|Page
the electrical contacts will open
E)
the resistance of the contacts decreases - ANSWERS✔-d
\Q\.What kind of sensing element is in a duct thermostat?
A)
a bi-metal strip
B)
a liquid filled sensing bulb
C)
a thermocouple
D)
a hygroscopic element
E)
a heat anticipator - ANSWERS✔-a
\Q\.Where should thermostats be located?
1. near warm air outlets
2. interior walls
3. outside walls
4. in the path of natural air circulation
A)1, 2
B)2, 3
C)3, 4
