NYC NYCHA THERMOSTAT REPAIRER EXAMINATION
Complete Practice Exam — 100+ Questions with
ANSWERs & Rationales 2026
SECTION 1: THERMOSTAT FUNDAMENTALS
Question 1
What is the primary function of a thermostat in a residential heating system?
A. Regulate fuel flow to the burner
B. Sense room temperature and control system operation
C. Increase boiler pressure for better circulation
D. Filter air contaminants before they enter the living space
Correct ANSWER: B
Rationale: A thermostat senses ambient temperature and signals heating or cooling equipment to turn
on or off to maintain a set point. The thermostat does not directly regulate fuel flow, increase pressure,
or filter air.
Question 2
Which type of thermostat uses a coiled metal strip made of two different metals bonded together?
A. Digital thermostat
B. Thermistor thermostat
C. Bimetallic thermostat
D. Pneumatic thermostat
,Correct ANSWER: C
Rationale: Bimetallic thermostats rely on two bonded metals that expand at different rates when
heated, causing the strip to bend and open or close electrical contacts.
Question 3
A thermostat that requires no external power source (no batteries or line voltage) is typically classified
as:
A. Line-voltage thermostat
B. Low-voltage electronic thermostat
C. Mechanical thermostat
D. Smart thermostat
Correct ANSWER: C
Rationale: Mechanical thermostats operate using physical movement (such as a bimetallic strip or
mercury switch) and do not require batteries or external power.
Question 4
What component inside a thermostat helps prevent temperature overshoot?
A. Transformer
B. Relay
C. Heat anticipator
D. Limit switch
Correct ANSWER: C
,Rationale: The heat anticipator slightly warms the sensing element to shut the system off before
overshooting the set temperature, improving comfort and efficiency.
Question 5
Which thermostat type allows scheduling different temperatures throughout the day?
A. Manual thermostat
B. Line-voltage thermostat
C. Programmable thermostat
D. Pneumatic thermostat
Correct ANSWER: C
Rationale: Programmable thermostats allow preset temperature changes based on time schedules,
enabling energy savings by automatically adjusting temperatures when occupants are away or asleep.
Question 6
A thermostat is designed to:
A. Increase electrical current to the heating system
B. Measure air pressure in the ductwork
C. Regulate temperature by controlling heating or cooling systems
D. Control water flow through radiators
Correct ANSWER: C
Rationale: Thermostats sense temperature changes and turn heating or cooling devices on or off to
maintain a set temperature.
Question 7
, A thermostat set to 72°F is in a room currently at 70°F. If it controls a heater, the heater will:
A. Turn off immediately
B. Turn on
C. Remain unaffected
D. Shut down permanently
Correct ANSWER: B
Rationale: The thermostat activates heating when the temperature falls below the setpoint to maintain
the desired temperature.
Question 8
What is the primary function of a room thermostat?
A. Regulate water pressure in the heating system
B. Sense room temperature and control heating output
C. Increase boiler efficiency through modulation
D. Control ventilation only
Correct ANSWER: B
Rationale: A thermostat measures ambient temperature and signals the heating system to turn on or off
to maintain a set point.
Question 9
A mercury-bulb thermostat must be mounted:
A. Vertically only
Complete Practice Exam — 100+ Questions with
ANSWERs & Rationales 2026
SECTION 1: THERMOSTAT FUNDAMENTALS
Question 1
What is the primary function of a thermostat in a residential heating system?
A. Regulate fuel flow to the burner
B. Sense room temperature and control system operation
C. Increase boiler pressure for better circulation
D. Filter air contaminants before they enter the living space
Correct ANSWER: B
Rationale: A thermostat senses ambient temperature and signals heating or cooling equipment to turn
on or off to maintain a set point. The thermostat does not directly regulate fuel flow, increase pressure,
or filter air.
Question 2
Which type of thermostat uses a coiled metal strip made of two different metals bonded together?
A. Digital thermostat
B. Thermistor thermostat
C. Bimetallic thermostat
D. Pneumatic thermostat
,Correct ANSWER: C
Rationale: Bimetallic thermostats rely on two bonded metals that expand at different rates when
heated, causing the strip to bend and open or close electrical contacts.
Question 3
A thermostat that requires no external power source (no batteries or line voltage) is typically classified
as:
A. Line-voltage thermostat
B. Low-voltage electronic thermostat
C. Mechanical thermostat
D. Smart thermostat
Correct ANSWER: C
Rationale: Mechanical thermostats operate using physical movement (such as a bimetallic strip or
mercury switch) and do not require batteries or external power.
Question 4
What component inside a thermostat helps prevent temperature overshoot?
A. Transformer
B. Relay
C. Heat anticipator
D. Limit switch
Correct ANSWER: C
,Rationale: The heat anticipator slightly warms the sensing element to shut the system off before
overshooting the set temperature, improving comfort and efficiency.
Question 5
Which thermostat type allows scheduling different temperatures throughout the day?
A. Manual thermostat
B. Line-voltage thermostat
C. Programmable thermostat
D. Pneumatic thermostat
Correct ANSWER: C
Rationale: Programmable thermostats allow preset temperature changes based on time schedules,
enabling energy savings by automatically adjusting temperatures when occupants are away or asleep.
Question 6
A thermostat is designed to:
A. Increase electrical current to the heating system
B. Measure air pressure in the ductwork
C. Regulate temperature by controlling heating or cooling systems
D. Control water flow through radiators
Correct ANSWER: C
Rationale: Thermostats sense temperature changes and turn heating or cooling devices on or off to
maintain a set temperature.
Question 7
, A thermostat set to 72°F is in a room currently at 70°F. If it controls a heater, the heater will:
A. Turn off immediately
B. Turn on
C. Remain unaffected
D. Shut down permanently
Correct ANSWER: B
Rationale: The thermostat activates heating when the temperature falls below the setpoint to maintain
the desired temperature.
Question 8
What is the primary function of a room thermostat?
A. Regulate water pressure in the heating system
B. Sense room temperature and control heating output
C. Increase boiler efficiency through modulation
D. Control ventilation only
Correct ANSWER: B
Rationale: A thermostat measures ambient temperature and signals the heating system to turn on or off
to maintain a set point.
Question 9
A mercury-bulb thermostat must be mounted:
A. Vertically only
