Question

Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of the following thermostats has been generally phased out because it depends on a standing pilot light? A. Mercury switch thermostat. B. Low-voltage thermostat. C. Millivolt thermostat. D. None of the above. 2. Wireless thermostats A. may interface with Wi-Fi to mobile devices B. activate a responder up to a distance of about 5,000' (152.4 m) C. generally use a bimetal device and linkage D. are hardwired to line voltage 3. Low-voltage thermostats operate at that is supplied by step-down transformers. A. 5 Vdc B. 24 Vac C. 120 Vac D. 240 Vac 4. If a customer is interested in automatic control of an HVAC system during different days and times of the day, recommend installing a thermostat. A. manual B. power-stealing C. programmable D. Wi-Fi 5. The main method of controlling zones in a forced-air HVAC system is through the use of A. dampers B. individual units in each room C. rheostat-controlled electrical supplies D. valves 6. To maintain sufficient airflow through an air handler when only some of the zones in a forced-air system are calling for cooling, a(n) is used. A. bypass damper B. exhaust vent C. freezestat D. variable-speed compressor 7. With power applied, a voltage measurement across a low-voltage thermostat switch that is closed should read about __ A. 0 V B. 12 Vdc C. 24 Vac D. 120 Vac or 240 Vac

          Multiple Choice
Identify the choice that best completes the statement or answers the question.

1. Which of the following thermostats has been generally phased out because it depends on a standing pilot light?
A. Mercury switch thermostat.
B. Low-voltage thermostat.
C. Millivolt thermostat.
D. None of the above.

2. Wireless thermostats
A. may interface with Wi-Fi to mobile devices
B. activate a responder up to a distance of about 5,000' (152.4 m)
C. generally use a bimetal device and linkage
D. are hardwired to line voltage

3. Low-voltage thermostats operate at ______ that is supplied by step-down transformers.
A. 5 Vdc
B. 24 Vac
C. 120 Vac
D. 240 Vac

4. If a customer is interested in automatic control of an HVAC system during different days and times of the day, recommend installing a ______ thermostat.
A. manual
B. power-stealing
C. programmable
D. Wi-Fi

5. The main method of controlling zones in a forced-air HVAC system is through the use of ______
A. dampers
B. individual units in each room
C. rheostat-controlled electrical supplies
D. valves

6. To maintain sufficient airflow through an air handler when only some of the zones in a forced-air system are calling for cooling, a(n) ______ is used.
A. bypass damper
B. exhaust vent
C. freezestat
D. variable-speed compressor

7. With power applied, a voltage measurement across a low-voltage thermostat switch that is closed should read about ______
A. 0 V
B. 12 Vdc
C. 24 Vac
D. 120 Vac or 240 Vac

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1. Which of the following thermostats has been generally phased out because it depends on a standing pilot light?
A. Mercury switch thermostat.
B. Low-voltage thermostat.
C. Millivolt thermostat.
D. None of the above.

2. Wireless thermostats
A. may interface with Wi-Fi to mobile devices
B. activate a responder up to a distance of about 5,000' (152.4 m)
C. generally use a bimetal device and linkage
D. are hardwired to line voltage

3. Low-voltage thermostats operate at that is supplied by step-down transformers.
A. 5 Vdc
B. 24 Vac
C. 120 Vac
D. 240 Vac

4. If a customer is interested in automatic control of an HVAC system during different days and times of the day, recommend installing a thermostat.
A. manual
B. power-stealing
C. programmable
D. Wi-Fi

5. The main method of controlling zones in a forced-air HVAC system is through the use of
A. dampers
B. individual units in each room
C. rheostat-controlled electrical supplies
D. valves

6. To maintain sufficient airflow through an air handler when only some of the zones in a forced-air system are calling for cooling, a(n) is used.
A. bypass damper
B. exhaust vent
C. freezestat
D. variable-speed compressor

7. With power applied, a voltage measurement across a low-voltage thermostat switch that is closed should read about
A. 0 V
B. 12 Vdc
C. 24 Vac
D. 120 Vac or 240 Vac

Added by Cindy B.

Question

Please give Ace some feedback