NYC NYCHA Thermostat Repairer
(Promotion) Practice Examination
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. The primary function of a room thermostat is to
A. Regulate water pressure
B. Sense room temperature and control heating output
C. Increase boiler efficiency
D. Control ventilation only
Rationale: A thermostat measures ambient temperature and signals
the heating system to turn on or off to maintain a set point.
2. A line-voltage thermostat is most commonly used to control
A. Low-voltage gas valves
B. Pneumatic controls
C. Electric baseboard heaters
, D. Steam traps
Rationale: Line-voltage thermostats are designed to handle higher
voltage loads such as electric heaters.
3. A low-voltage thermostat typically operates at
A. 120 volts
B. 240 volts
C. 24 volts
D. 480 volts
Rationale: Most HVAC control circuits use 24V supplied by a control
transformer.
4. If a thermostat is not calling for heat when the room is cold, the first
step should be to
A. Replace the boiler
B. Check thermostat settings and power
C. Drain the system
D. Replace all wiring
Rationale: Basic troubleshooting starts with verifying settings,
batteries, and power before major repairs.
5. A thermostat anticipator is used to
A. Increase system pressure
B. Prevent temperature overshoot
C. Control water flow
D. Improve insulation
, Rationale: The anticipator helps the system shut off early to avoid
overheating the space.
6. Which tool is best for checking voltage at thermostat terminals?
A. Pipe wrench
B. Infrared thermometer
C. Multimeter
D. Pressure gauge
Rationale: A multimeter measures voltage, resistance, and continuity
in electrical circuits.
7. In a steam-heated apartment, thermostats primarily control
A. Steam pressure
B. Condensate return
C. Boiler firing or zone valves
D. Chimney draft
Rationale: The thermostat signals the boiler or control valves to
supply heat.
8. A thermostat that cycles the system on and off too frequently may
have
A. A broken heat exchanger
B. An improperly set anticipator
C. Excessive insulation
D. Low water level
Rationale: Incorrect anticipator settings cause short cycling.
, 9. Digital thermostats require batteries mainly to
A. Power the boiler
B. Maintain display and memory
C. Increase voltage
D. Control steam traps
Rationale: Batteries power the electronic display and internal
circuitry.
10. If a thermostat display is blank, the most likely cause is
A. High room temperature
B. Excessive pressure
C. Dead batteries or loss of power
D. Faulty radiator
Rationale: Loss of power is the most common reason for a blank
display.
11. A mercury-bulb thermostat must be mounted
A. Vertically only
B. Level to function correctly
C. Near a radiator
D. In direct sunlight
Rationale: Mercury thermostats rely on level positioning for accurate
operation.
12. Which location is best for installing a room thermostat?
A. Above a heater
(Promotion) Practice Examination
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. The primary function of a room thermostat is to
A. Regulate water pressure
B. Sense room temperature and control heating output
C. Increase boiler efficiency
D. Control ventilation only
Rationale: A thermostat measures ambient temperature and signals
the heating system to turn on or off to maintain a set point.
2. A line-voltage thermostat is most commonly used to control
A. Low-voltage gas valves
B. Pneumatic controls
C. Electric baseboard heaters
, D. Steam traps
Rationale: Line-voltage thermostats are designed to handle higher
voltage loads such as electric heaters.
3. A low-voltage thermostat typically operates at
A. 120 volts
B. 240 volts
C. 24 volts
D. 480 volts
Rationale: Most HVAC control circuits use 24V supplied by a control
transformer.
4. If a thermostat is not calling for heat when the room is cold, the first
step should be to
A. Replace the boiler
B. Check thermostat settings and power
C. Drain the system
D. Replace all wiring
Rationale: Basic troubleshooting starts with verifying settings,
batteries, and power before major repairs.
5. A thermostat anticipator is used to
A. Increase system pressure
B. Prevent temperature overshoot
C. Control water flow
D. Improve insulation
, Rationale: The anticipator helps the system shut off early to avoid
overheating the space.
6. Which tool is best for checking voltage at thermostat terminals?
A. Pipe wrench
B. Infrared thermometer
C. Multimeter
D. Pressure gauge
Rationale: A multimeter measures voltage, resistance, and continuity
in electrical circuits.
7. In a steam-heated apartment, thermostats primarily control
A. Steam pressure
B. Condensate return
C. Boiler firing or zone valves
D. Chimney draft
Rationale: The thermostat signals the boiler or control valves to
supply heat.
8. A thermostat that cycles the system on and off too frequently may
have
A. A broken heat exchanger
B. An improperly set anticipator
C. Excessive insulation
D. Low water level
Rationale: Incorrect anticipator settings cause short cycling.
, 9. Digital thermostats require batteries mainly to
A. Power the boiler
B. Maintain display and memory
C. Increase voltage
D. Control steam traps
Rationale: Batteries power the electronic display and internal
circuitry.
10. If a thermostat display is blank, the most likely cause is
A. High room temperature
B. Excessive pressure
C. Dead batteries or loss of power
D. Faulty radiator
Rationale: Loss of power is the most common reason for a blank
display.
11. A mercury-bulb thermostat must be mounted
A. Vertically only
B. Level to function correctly
C. Near a radiator
D. In direct sunlight
Rationale: Mercury thermostats rely on level positioning for accurate
operation.
12. Which location is best for installing a room thermostat?
A. Above a heater
