Page 1 of 113
NYC Thermostat Repairer (CUNY) Exam Actual Test
Questions and Correct Answers With Rationales
LATEST THIS YEAR
NYC Thermostat Repairer (CUNY) Exam
SUMMARIZED EXAM COVERAGE
The NYC Thermostat Repairer (CUNY) exam assesses knowledge and practical skills for maintaining
temperature control systems across City University of New York facilities . Key areas include:
mechanical, digital, programmable, and direct digital control (DDC) thermostats; low-voltage HVAC
control circuits (terminals R, W, Y, G, C); transformers and step-down voltage; pneumatic control
systems and air pressure lines; multimeter use for voltage, resistance, and continuity; installation
procedures including mounting, leveling, and wiring; calibration and heat anticipator adjustments;
troubleshooting sequences (power → control → output); safety practices including lockout/tagout and
PPE; and work order documentation .
.
1. What is the primary function of a thermostat in a residential heating system?
A) To increase water pressure in heating pipes
B) To sense room temperature and control the heating system based on the setpoint
C) To regulate electrical service to the entire apartment building
D) To replace the boiler safety controls during cold weather
Answer: B
Rationale: A thermostat monitors room temperature and signals the heating system to operate when
heating is needed to maintain the selected setpoint .
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2. Why is proper thermostat location important for accurate temperature control?
A) It determines boiler fuel type
B) It affects how accurately the thermostat senses the actual room temperature
C) It controls the building's electrical meter reading
D) It changes the water level inside radiators
Answer: B
Rationale: A thermostat must be located where it can sense representative room temperature without
false influences from drafts, heat sources, or sunlight .
3. A thermostat is installed on a wall receiving direct sunlight for most of the day. What is the most likely
system behavior?
A) Accurate readings throughout the day
B) False high readings causing improper cycling and occupant discomfort
C) Faster heating response time
D) Increased airflow from registers
Answer: B
, Page 3 of 113
Rationale: Direct sunlight heats the thermostat housing, causing false high temperature readings and
making the system cycle off prematurely .
4. Which tool is most commonly used to check voltage or continuity during thermostat troubleshooting?
A) Pipe wrench
B) Multimeter
C) Putty knife
D) Caulking gun
Answer: B
Rationale: A multimeter is the standard diagnostic tool for checking voltage, resistance, continuity, and
electrical circuit conditions in thermostat work .
5. What is one common sign that a thermostat may not be calling for heat properly?
A) The heating equipment never receives a control signal when the room is cold
B) The thermostat cover is mounted level on the wall
C) The apartment windows are closed
D) The radiator has already been painted
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Answer: A
Rationale: If the thermostat does not close the control circuit when heat is needed, the system will not
receive the signal to run .
6. Why should thermostat wires be labeled before disconnecting them during replacement?
A) To reduce the need for wall anchors
B) To ensure correct reconnection and prevent wiring errors
C) To improve paint adhesion around the device
D) To eliminate the need for testing afterward
Answer: B
Rationale: Proper wire identification helps avoid miswiring and system malfunction during thermostat
installation .
7. What is the primary purpose of a low-voltage thermostat circuit in many heating systems?
A) To operate heavy building elevator motors
B) To safely control heating equipment through a low-voltage switching circuit
NYC Thermostat Repairer (CUNY) Exam Actual Test
Questions and Correct Answers With Rationales
LATEST THIS YEAR
NYC Thermostat Repairer (CUNY) Exam
SUMMARIZED EXAM COVERAGE
The NYC Thermostat Repairer (CUNY) exam assesses knowledge and practical skills for maintaining
temperature control systems across City University of New York facilities . Key areas include:
mechanical, digital, programmable, and direct digital control (DDC) thermostats; low-voltage HVAC
control circuits (terminals R, W, Y, G, C); transformers and step-down voltage; pneumatic control
systems and air pressure lines; multimeter use for voltage, resistance, and continuity; installation
procedures including mounting, leveling, and wiring; calibration and heat anticipator adjustments;
troubleshooting sequences (power → control → output); safety practices including lockout/tagout and
PPE; and work order documentation .
.
1. What is the primary function of a thermostat in a residential heating system?
A) To increase water pressure in heating pipes
B) To sense room temperature and control the heating system based on the setpoint
C) To regulate electrical service to the entire apartment building
D) To replace the boiler safety controls during cold weather
Answer: B
Rationale: A thermostat monitors room temperature and signals the heating system to operate when
heating is needed to maintain the selected setpoint .
, Page 2 of 113
2. Why is proper thermostat location important for accurate temperature control?
A) It determines boiler fuel type
B) It affects how accurately the thermostat senses the actual room temperature
C) It controls the building's electrical meter reading
D) It changes the water level inside radiators
Answer: B
Rationale: A thermostat must be located where it can sense representative room temperature without
false influences from drafts, heat sources, or sunlight .
3. A thermostat is installed on a wall receiving direct sunlight for most of the day. What is the most likely
system behavior?
A) Accurate readings throughout the day
B) False high readings causing improper cycling and occupant discomfort
C) Faster heating response time
D) Increased airflow from registers
Answer: B
, Page 3 of 113
Rationale: Direct sunlight heats the thermostat housing, causing false high temperature readings and
making the system cycle off prematurely .
4. Which tool is most commonly used to check voltage or continuity during thermostat troubleshooting?
A) Pipe wrench
B) Multimeter
C) Putty knife
D) Caulking gun
Answer: B
Rationale: A multimeter is the standard diagnostic tool for checking voltage, resistance, continuity, and
electrical circuit conditions in thermostat work .
5. What is one common sign that a thermostat may not be calling for heat properly?
A) The heating equipment never receives a control signal when the room is cold
B) The thermostat cover is mounted level on the wall
C) The apartment windows are closed
D) The radiator has already been painted
, Page 4 of 113
Answer: A
Rationale: If the thermostat does not close the control circuit when heat is needed, the system will not
receive the signal to run .
6. Why should thermostat wires be labeled before disconnecting them during replacement?
A) To reduce the need for wall anchors
B) To ensure correct reconnection and prevent wiring errors
C) To improve paint adhesion around the device
D) To eliminate the need for testing afterward
Answer: B
Rationale: Proper wire identification helps avoid miswiring and system malfunction during thermostat
installation .
7. What is the primary purpose of a low-voltage thermostat circuit in many heating systems?
A) To operate heavy building elevator motors
B) To safely control heating equipment through a low-voltage switching circuit
