NYC Custodian Engineer Cliff Book 2026 | Latest Update |
Questions & Answers | Study Guide | Graded A+
1. The stack switch or stack relay
starts to burn then the thermostat calls for heat
shuts down the burner if it does not sense heat in the fuel products
cuts off the ignition after the flame has been established
all of the above
2. If a boiler's Pressutrol fails and pressure levels rise uncontrollably, what
immediate action should be taken to ensure safety?
Reduce the water level in the boiler.
Increase the fuel supply to the boiler.
Ignore the pressure readings and continue operation.
Activate emergency shutdown procedures.
3. If a suction gauge in a fuel oil transfer system reads a low pressure, what
could be a potential issue affecting the system?
Clogged fuel lines or filters
High combustion efficiency
Increased boiler water treatment
Excessive fuel flow rate
4. What is the name of the device that controls the flow of steam into the coils
of a domestic hot water supply tank?
Steam control valve
, Thermostatic valve
Pressure relief valve
Flow meter
5. Describe the importance of checking the power supply when
troubleshooting an oil burner that does not start after pressing the reset
button.
Checking the power supply is unnecessary since the reset button was
pressed.
Checking the power supply is only relevant for electric burners.
Checking the power supply is crucial because without power, the
burner motor cannot operate, making it the first step in
troubleshooting.
Checking the power supply helps to determine if the fuel is
contaminated.
6. What is the primary function of a stack switch in an oil burner system?
To monitor flue gas flow and ensure safe operation.
To regulate fuel supply to the burner.
To control the temperature of the boiler water.
To ignite the oil in the burner.
7. A Pressuretrol is used to control:
Temperature
Dynamic transfer
System pressure
, Airflow pressure
8. Describe the role of sodium hydroxide in boiler water treatment as outlined
in the glossary.
Sodium hydroxide is used to lower the temperature of boiler water.
Sodium hydroxide is used to enhance combustion efficiency.
Sodium hydroxide is used to raise the pH of boiler water, preventing
corrosion and scaling.
Sodium hydroxide is used to remove soot from boiler surfaces.
9. If a boiler system is experiencing corrosion issues, which treatment method
involving sodium hydroxide would you recommend based on the glossary?
Decrease the water temperature.
Increase the pH of the boiler water.
Increase the oxygen levels in the boiler.
Reduce the water level in the boiler.
10. If a Fusetron in a boiler system fails, what immediate effect might this have
on the boiler's operation?
Increased risk of electrical overload and potential equipment
damage.
Reduced boiler pressure.
Improved combustion efficiency.
Enhanced water treatment processes.
11. Describe how excessive water in a boiler can impact its operation and safety.
Excessive water has no significant impact on boiler operation.
, Excessive water enhances heat transfer and increases energy output.
Excessive water improves combustion efficiency and reduces
emissions.
Excessive water can lead to water carryover, which may cause
damage to the boiler and affect safety.
12. What is one common method for detecting gas leaks in a boiler system?
Thermal imaging
Pressure gauge monitoring
Infrared camera inspection
Soapy water test
13. What device is used to monitor and control pressure in a boiler system?
Thermocouple
Manometer
Pressutrol
Flowmeter
14. How does humidity affect boiler operation and maintenance as described in
the glossary?
Humidity can influence combustion efficiency and the overall
performance of the heating system.
Humidity is irrelevant to heating systems.
Humidity has no effect on boiler operation.
Humidity only affects the physical structure of the boiler.
Questions & Answers | Study Guide | Graded A+
1. The stack switch or stack relay
starts to burn then the thermostat calls for heat
shuts down the burner if it does not sense heat in the fuel products
cuts off the ignition after the flame has been established
all of the above
2. If a boiler's Pressutrol fails and pressure levels rise uncontrollably, what
immediate action should be taken to ensure safety?
Reduce the water level in the boiler.
Increase the fuel supply to the boiler.
Ignore the pressure readings and continue operation.
Activate emergency shutdown procedures.
3. If a suction gauge in a fuel oil transfer system reads a low pressure, what
could be a potential issue affecting the system?
Clogged fuel lines or filters
High combustion efficiency
Increased boiler water treatment
Excessive fuel flow rate
4. What is the name of the device that controls the flow of steam into the coils
of a domestic hot water supply tank?
Steam control valve
, Thermostatic valve
Pressure relief valve
Flow meter
5. Describe the importance of checking the power supply when
troubleshooting an oil burner that does not start after pressing the reset
button.
Checking the power supply is unnecessary since the reset button was
pressed.
Checking the power supply is only relevant for electric burners.
Checking the power supply is crucial because without power, the
burner motor cannot operate, making it the first step in
troubleshooting.
Checking the power supply helps to determine if the fuel is
contaminated.
6. What is the primary function of a stack switch in an oil burner system?
To monitor flue gas flow and ensure safe operation.
To regulate fuel supply to the burner.
To control the temperature of the boiler water.
To ignite the oil in the burner.
7. A Pressuretrol is used to control:
Temperature
Dynamic transfer
System pressure
, Airflow pressure
8. Describe the role of sodium hydroxide in boiler water treatment as outlined
in the glossary.
Sodium hydroxide is used to lower the temperature of boiler water.
Sodium hydroxide is used to enhance combustion efficiency.
Sodium hydroxide is used to raise the pH of boiler water, preventing
corrosion and scaling.
Sodium hydroxide is used to remove soot from boiler surfaces.
9. If a boiler system is experiencing corrosion issues, which treatment method
involving sodium hydroxide would you recommend based on the glossary?
Decrease the water temperature.
Increase the pH of the boiler water.
Increase the oxygen levels in the boiler.
Reduce the water level in the boiler.
10. If a Fusetron in a boiler system fails, what immediate effect might this have
on the boiler's operation?
Increased risk of electrical overload and potential equipment
damage.
Reduced boiler pressure.
Improved combustion efficiency.
Enhanced water treatment processes.
11. Describe how excessive water in a boiler can impact its operation and safety.
Excessive water has no significant impact on boiler operation.
, Excessive water enhances heat transfer and increases energy output.
Excessive water improves combustion efficiency and reduces
emissions.
Excessive water can lead to water carryover, which may cause
damage to the boiler and affect safety.
12. What is one common method for detecting gas leaks in a boiler system?
Thermal imaging
Pressure gauge monitoring
Infrared camera inspection
Soapy water test
13. What device is used to monitor and control pressure in a boiler system?
Thermocouple
Manometer
Pressutrol
Flowmeter
14. How does humidity affect boiler operation and maintenance as described in
the glossary?
Humidity can influence combustion efficiency and the overall
performance of the heating system.
Humidity is irrelevant to heating systems.
Humidity has no effect on boiler operation.
Humidity only affects the physical structure of the boiler.
