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Boilers Trivia Quiz

The following are a series of questions relating to steam boilers which those learning the trade may find very interesting.

A multiple-choice quiz by meremaleaus. Estimated time: 4 mins.

Author
meremaleaus

Time
4 mins

Type
Multiple Choice

Quiz #
306,413

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
7 / 10

Plays
694

Last 3 plays: Guest 72 (8/10), cardsfan_027 (9/10), Guest 24 (8/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. What is a steam boiler? Hint

A closed steel vessel, containing water which is heated for the purpose of generating steam.

An open vessel which generates steam to be used to inhale when you have a cold.

A large steel container which stores water used to cook in.

A simple kettle type pot for heating water.

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Question 2 of 10

2. What is the purpose of a gauge glass on a steam boiler? Hint

To show if the boiler water is boiling.

To show how much steam space is in the boiler.

To indicate the correct water level in the boiler.

To indicate if the water in the boiler is dirty.

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Question 3 of 10

3. What is the vital part of all boilers? Hint

The lowest part of the steam and water drum.

The first part of the boiler which becomes over heated due to the lowering water level.

The secondary super heater tubes.

The water wall headers.

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Question 4 of 10

4. In fire tube boilers, what type of plug is fitted to put the fires out when the vital part is exposed? Hint

A fusible plug.

A welsh plug.

A spark plug.

A conical plug.

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Question 5 of 10

5. What is the purpose of excess air in relation to boiler combustion? Hint

To generate black smoke.

To ensure complete combustion.

To help clean the ozone layer.

Stop build up of klinker in the boiler.

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Question 6 of 10

6. How does a feed water economizer work? Hint

It takes hot water from the flue gases prior to entering the boiler.

Water purification is carried out in the economizer.

It removes the need to boil water in the boiler.

It allows heat transfer to occur from the flue gases to the feed water.

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Question 7 of 10

7. Why is boiler feed water quality important? Hint

To prevent scale build up.

To prevent boiler pressure parts failure.

To protect the internal boiler surfaces.

All are correct.

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Question 8 of 10

8. What fuel is used to make PF (pulverized fuel)? Hint

Coal.

Shale.

Oil.

Gas.

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Question 9 of 10

9. What is the purpose of a safety valve fitted to a steam boiler? Hint

To help lower the water level.

Ensure the boiler generates steam

Generate steam flow in the super heater.

To release excess pressure.

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Question 10 of 10

10. What is the basic purpose of superheaters in a boiler? Hint

To increase the steam pressure.

To increase the temperature of the steam.

Preheat feed water.

Increase saturation temperature of the steam.

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Quiz Answer Key and Fun Facts

1. What is a steam boiler?

Answer: A closed steel vessel, containing water which is heated for the purpose of generating steam.

A steam boiler is designed to contain water and steam of both high temperature and pressure.

2. What is the purpose of a gauge glass on a steam boiler?

Answer: To indicate the correct water level in the boiler.

The gauge glass is an essential mounting fitted to a boiler. The boiler should not be operated if the gauge glass is faulty.

3. What is the vital part of all boilers?

Answer: The first part of the boiler which becomes over heated due to the lowering water level.

As the water level continues to fall in a firing boiler, this will cause the metal to become overheated and could cause the catastrophic failure of the boiler pressure parts.

4. In fire tube boilers, what type of plug is fitted to put the fires out when the vital part is exposed?

Answer: A fusible plug.

A fusible plug has a soft metal center which melts due to the boilers excessive heat. The now hollow plug allows the steam to enter the furnace space which will put out the fire.

5. What is the purpose of excess air in relation to boiler combustion?

Answer: To ensure complete combustion.

All fossil fuels to be burnt efficiently must have a minimum amount of air to completely burn. Therefore the only way to ensure that the fuel is burnt you must have more air than is needed. This is measured via 02 residual reading prior to the combustion gases entering the atmosphere.

6. How does a feed water economizer work?

Answer: It allows heat transfer to occur from the flue gases to the feed water.

The economizer is located in the hot flue gas pass. The boiler feed water passes through the inside tubes of the economizer. The heat from the flue gases passes over these pipes and the heat is passed into the feed water. This recaptured heat reduces the amount of fuel needed to be used as the water temperature going into the boiler is increased.

7. Why is boiler feed water quality important?

Answer: All are correct.

Boiler feed water quality is a very large subject and takes a great deal of study to understand it thoroughly. When water boils almost none of the impurities from the water carry over with the steam. The impurities will accumulate in the boiler water and very quickly settle out in the boiler.

This will not only lead to eventual failure of the pressure parts but reduces the efficiency of the boiler due to poor heat transfer through the steel heating surfaces.

8. What fuel is used to make PF (pulverized fuel)?

Answer: Coal.

Pulverized fuel is coal which has been broken down to a very small powder which burns very efficiently, generally in larger boiler.

9. What is the purpose of a safety valve fitted to a steam boiler?

Answer: To release excess pressure.

Safety valves are considered an essential fitting to a boiler and if it does not function correctly at the set pressure, the boiler should not be operated.

10. What is the basic purpose of superheaters in a boiler?

Answer: To increase the temperature of the steam.

By increasing the temperature of the steam you can get more work from the steam, thereby increasing the efficiency of the process.

Source: Author meremaleaus

This quiz was reviewed by FunTrivia editor crisw before going online.
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