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Gas safety and controls

Gas safety and controls

Assessment

Presentation

•

Professional Development

•

Vocational training

•

Hard

Created by

Ice one

FREE Resource

20 Slides • 20 Questions

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Multiple Choice

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Which of the following is NOT listed as a control and safety device?

1

Valves

2

Thermostats

3

Transformers

4

Regulators

5

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Open Ended

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Explain how a bimetallic strip works and describe one practical application for it.

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Multiple Select

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Which of the following statements about thermoelectric devices is/are correct?

1

They generate electric current when two dissimilar metals are joined and heated.

2

They are used to hold open gas control valves.

3

A thermopile produces a higher voltage than a thermocouple.

4

They are used to measure atmospheric pressure.

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Fill in the Blank

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A regulator reduces incoming pressure (supply pressure) to ___ pressure (working pressure).

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Open Ended

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Describe the role of a diaphragm and atmospheric pressure in the operation of a regulator.

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Fill in the Blank

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When used for controlling gas, solenoids must be ___ to open and also fast acting.

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16

Multiple Choice

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Which of the following components is commonly used for over temperature protection in electronic circuits?

1

Thermistors

2

Pressure switches

3

Mercury switches

4

Bimetal thermostats

17

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Open Ended

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Explain how tip switches and mercury switches contribute to tip over protection in safety systems.

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20

Fill in the Blank

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A diaphragm in a pressure switch moves in response to changes in ___.

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Multiple Select

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Which of the following statements about the oxygen depletion system is/are correct?

1

It prevents CO poisoning by shutting down the appliance when oxygen is low.

2

It increases the gas flow when oxygen is low.

3

The thermocouple cools and releases the gas control valve when oxygen drops.

4

The pilot flame lifts off in search of oxygen when primary air is low.

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Open Ended

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Describe the process of flame rectification and its importance in gas control systems.

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Fill in the Blank

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The main purpose of a thermostat is to maintain a specific ___ within an environment.

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Multiple Choice

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Which of the following is NOT a type of ignition device?

1

Pilot flame

2

Filament

3

Thermistor

4

Flash tube

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Open Ended

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How does a Peizo igniter produce a spark?

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Multiple Choice

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What is the main purpose of a regulator in a combination control valve system?

1

To ignite the burner

2

To control gas pressure

3

To detect flame failure

4

To cut off energy supply

33

Multiple Select

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Which functions can be controlled by a combination control valve?

1

Gas valve

2

Thermostat

3

Energy Cut Off (ECO)

4

Ignition coil

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Fill in the Blank

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A device that changes its resistance with temperature is called a ___.

38

Open Ended

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What are some important safety considerations when working with gas control devices?

39

Multiple Choice

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Why is it important to have gas control and safety devices in gas systems?

1

To ensure safe operation and prevent accidents

2

To increase the speed of gas flow

3

To reduce the cost of gas

4

To make the system look more complex

40

Open Ended

Describe a situation where a gas safety device could prevent a serious accident. What role does the device play in ensuring safety?

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