Chapter 90- Cast Iron Sectional and Modular Boilers Flashcards Preview

Power Engineering- 4th Class > Chapter 90- Cast Iron Sectional and Modular Boilers > Flashcards

Flashcards in Chapter 90- Cast Iron Sectional and Modular Boilers Deck (43)
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1
Q

Where are the cleanout plugs located on a cast iron sectional boiler?

A

In the front section

2
Q

A wet bottom type cast iron sectional boiler?

A

Surrounds the furnace entirely

3
Q

Cast iron sectional boiler sections are held together with?

A

Tie rods

4
Q

The steam and water spaces of a cast iron sectional boiler are connected by?

A

push nipples

5
Q

A cast iron boiler disadvantage is?

A

Its pressure limitations

6
Q

A cast iron boiler advantage is?

A

the choice of assembly location

7
Q

Most low capacity cast iron boilers?

A

Will pass through standard size doorways

8
Q

As far as boiler capacity is concerned, the mechanical designer has which two choices?

A

A) Using one or two large boilers

B) Connecting multiple smaller boilers in parallel

9
Q

Water flow in a cast iron modular boiler?

A

Continuous through all modules

10
Q

The operation of the burners in a Modular Cast iron Heating Plant?

A

is controlled by a step controller

11
Q

Low pressure boilers are made of? (2)

A

Steel and cast iron

12
Q

The ratio of heat released to heat transferred to boiler water is known as?

A

Boiler efficiency

13
Q

Cast iron boiler sections maximize heat transfer by

A

Exposing as large a surface as possible to the hot gases

14
Q

Cast iron boilers are classified as two types

A

Vertical and horizontal

15
Q

The fins in a cast iron boiler are used to

A

Increase the heating surface to increase efficiency

16
Q

Vertical cast iron boilers have the heater mounted

A

On the button of the unit

17
Q

How do you increase the size of the boiler?

A

Add more sections to the boiler

18
Q

What connects the sections of the cast iron boiler?

A

Push nipples

19
Q

Cast iron boilers are often sealed with a

A

Asbestos rope

20
Q

In a horizontal sectional cast iron boiler how many push nipples connect the sections

A

1 nipple connects two sections

21
Q

Number one advantage in a cast iron boiler

A

Corrosion resistance

22
Q

A great advantage of constructing a cast iron boiler

A

It is easily assembled as its built in many sections

23
Q

Can you enlarge a cast iron boiler

A

Yes, by adding more sections

24
Q

When is a heating boiler most efficient?

A

When it is running continuously

25
Q

A benefit of a smaller boiler

A

Relatively light so a strong foundation is not required

26
Q

In a heating boiler water enters in the

A

Return header

27
Q

In a heating boiler water exits in the

A

Supply header

28
Q

Where are the clean out plugs located in a cast iron boiler?

A

On the front and rear sections

29
Q

A wet bottom type cast iron boiler

A

Surrounds the furnace entirely

30
Q

Cast iron sectional boilers are held together with

A

Tie rods

31
Q

The steam and water spaces of a cast iron sectional boiler are connected by

A

Push nipples

32
Q

A cast iron boilers disadvantage is

A

It’s pressure limitations

33
Q

A cast iron boiler advantage is

A

The choice of assembly location

34
Q

Most low capacity cast iron boiler

A

Will pass through standard sized doorways

35
Q

As far as boiler capacity is concerned, the mechanical designer has which two of the following choices

A

Using one or two boilers

Connecting multiple smaller boilers in parallel

36
Q

Water flow in a cast iron modular boiler is

A

Continuous through all modules

37
Q

The operation of the burners in a modular cast iron heating plant

A

Is controlled by a step controller

38
Q

Low pressure boilers are made of

A

Steel

Cast iron

39
Q

The ratio of heat released to heat transferred to boiler water is known as

A

Boiler efficiency

40
Q

Cast iron boiler sections maximize heat transfer by

A

Exposing as large a surface as possible to the hot gas

41
Q

Advantages of a cast iron boiler (4)

A

High resistance to corrosion
Ease of assembly
Choice of assembly location
Possibility of enlarging the boiler capacity

42
Q

Heating bless attain maximum efficiency

A

When they operate continuously at full load

43
Q

The sections in a cast iron boiler are sealed by

A

High temperature rope