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Electrical Control of Combustion System Quiz

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Electrical Control of Combustion System Quiz

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Questions and Answers

What is the purpose of purging the combustion space of unburnt gas in a boiler system?

To reduce the amount of oil circulating through the system

To increase the fuel pressure for efficient combustion

To cool down the combustion chamber

To prevent the formation of an explosive air/gas mixture (correct)

Which component in the electrical control scheme switches in the fan and oil circulating pump?

Thermostat on the electric heating elements (correct)

Fuel heater solenoid

Pressure sensor in the oil circulating valve

Atomizing temperature controller

What is the primary purpose of the fuel heater in a boiler system?

To heat up and circulate the fuel (correct)

To increase steam pressure

To cool down the combustion space

To ignite the flame

Why is it important for the oil to flow through the burner until it is hot and thin enough to atomize?

To ensure efficient atomization of fuel for combustion Signup and view all the answers

What might happen if the air from the fan does not purge the combustion spaces for a sufficient time period?

Formation of an explosive air/fuel mixture Signup and view all the answers

Which component ensures that when the oil circulating solenoid is operated, fuel is delivered to the low flame spill and not returned to the pump?

Oil change valve Signup and view all the answers

What is the purpose of the float switch in a boiler system?

To activate an alarm in case of low water level Signup and view all the answers

Why must gauge glasses in a boiler be regularly checked?

To prevent choking by solids and scum formation Signup and view all the answers

What could happen if there is incorrect air quantity due to a fault with the damper in a boiler?

The burner will shut off Signup and view all the answers

How can deviation from the correct temperature affect boiler operation?

The burner will be shut off Signup and view all the answers

What is one method to check the operation of the flame failure photo-cell in a boiler system?

Starting the boiler with the circulating solenoid cut out Signup and view all the answers

What action would result from a reduction in steam demand?

Closing the feed water control valve Signup and view all the answers

What does the piston valve do when fuel is supplied at low pressure?

Closes off the passage to the atomizing nozzle Signup and view all the answers

How many different pressures can the system supply the atomizer with fuel?

Three pressures Signup and view all the answers

What is the purpose of the solenoid valves in this system?

Provide a return path for fuel to the suction side of the fuel pressure pump Signup and view all the answers

What happens when either spill valve is in circuit?

Provides a return path for the fuel to the suction side of the fuel pressure pump Signup and view all the answers

What is used to supply fuel to the burner in this system?

Gear pump with relief arrangement Signup and view all the answers