Which of the following actions takes place...

Question 1 / 2066636eef28f7522a1c51fafe

Question 1 of 2066636eef28f7522a1c51fafe

Which of the following actions takes place in the control circuit of a semi-automatic (manual ignition) fired auxiliary boiler when the desired steam pressure is obtained?

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Question 1 of 20

66636eef28f7522a1c51fafe

Which of the following actions takes place in the control circuit of a semi-automatic (manual ignition) fired auxiliary boiler when the desired steam pressure is obtained?

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🔍 Key Concepts

• Pressuretrol / pressure control function in a semi-automatic boiler • Difference between ignition circuit and burner motor/burner circuit • What happens at cut-out and cut-in steam pressures in automatic control

💭 Think About

• When the boiler reaches the desired (cut-out) steam pressure, what must happen so the pressure does not keep rising? Think about whether ignition and fuel supply are still needed. • In a semi-automatic manual ignition system, can the burner immediately be restarted by the operator at any pressure, or is there an interlock related to steam pressure? • Which of the options describes an action that is controlled by steam pressure rather than by temperature or stack conditions?

✅ Before You Answer

• Identify which choices mention a control that responds to steam pressure, not temperature or stack gases. • Check which option implies an interlock that stops the burner and also controls when it is allowed to restart (cut-in vs. cut-out pressure). • Eliminate any choice that would permanently secure ignition or burner power without reference to the pressure falling back below a set cut-in pressure.

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Question 1 of 20

Which of the following actions takes place in the control circuit of a semi-automatic (manual ignition) fired auxiliary boiler when the desired steam pressure is obtained?

A temperature sensing device opens the circuit breaker in the burner motor.

The stack relay actuates the low limit control which breaks the ignition circuit.

Secures the burner circuit and prevents manual re-starting of the burner until the steam pressure falls below the set cut-in pressure.

The stack relay secures power to the high voltage side of the ignition transformer.

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Question 1 / 2066636eef28f7522a1c51fafe

Question 1 of 2066636eef28f7522a1c51fafe

Which of the following actions takes place in the control circuit of a semi-automatic (manual ignition) fired auxiliary boiler when the desired steam pressure is obtained?

Back

Question 1 of 20

66636eef28f7522a1c51fafe

Which of the following actions takes place in the control circuit of a semi-automatic (manual ignition) fired auxiliary boiler when the desired steam pressure is obtained?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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