Steam Boilers Heating By Jcw

Front 1

As water is heated in a boiler, the water molecules ________

Back 1

Speed up

Front 2

As water molecules change to steam, they ______

Back 2

Expand approximately 1500-1700 times

Front 3

_______Is generated in the water, flows up through the water, and disengages at the waterline

Back 3

Steam

Front 4

When water is heated beyond the boiling point, the water molecules ______

Back 4

Change from a liquid to a gas

Front 5

Internal water flow within a Weil-McLain boiler is through the _______, providing for better thermal circulation and heat transfer

Back 5

Lower ports and lower portion of the upper ports

Front 6

A "Wet nipple" boiler refers to the fact that water can flow _____

HAHA WET NIPPLE... classic.

Back 6

Through the upper and lower port openings

Front 7

As steam is generated and released from the water, it collects in the ________

Back 7

Steam chest

Front 8

The generation and release of steam in a boiler created a very ______ boiler waterline

Back 8

Turbulent

Front 9

A radiator air vent ______ when the steam contacts its heat actuated float valve

Back 9

Closes

Front 10

Steam ______ its heat energy as it changes to condensate

Back 10

releases

Front 11

When steam cools in the radiator, it ______

Back 11

changes from a gas to a liquid.

Front 12

As the steam cools and turns to condensate, it returns to the boiler through the ______

Back 12

Return piping system

Front 13

Visual aid of steam boilers and their parts

Back 13

Only one f*cking side

Front 14

The ___ controls the cycling of a steam boiler.

Back 14

Pressure control

Front 15

The pressure control is piped into the boiler through _____

Back 15

the pigtail system

Front 16

A pressure control with an additive differential has the following two settings.

Back 16

Low and differential

Front 17

If on a subtractive boiler pressure control, you set the differential at 1.5 PSI and the high setting at 2.0 PSI what would be the low (or burner on) setting?

Back 17

0.5 PSI 2-1.5 = 0.5

Front 18

The ____ acts just like a trap in a plumbing application and protects the pressure control from coming into direct contact with the steam.

Back 18

Pigtail Syphon

Front 19

The ____ gives readings of the pressure within the boiler

Back 19

pressure gauge

Front 20

The ____ is provided for visual inspection of the boilers operating water level.

Back 20

water-column gauge glass AKA the sight glass

Front 21

On or near the top of the boiler you will find a _____, used to protect the boiler from excessive pressure

Back 21

Pressure relief valve

Front 22

For residential cast iron steam boilers, the steam pressure relief valve is set to discharge at a maximum of ____ psi

Back 22

15

Front 23

The safety device that automatically shuts the boiler-burners off when the boiler water level drops below the water level control setting, is called a ______ ?

Back 23

low-water cutoff

Front 24

All ____ boilers are required by code to have a low-water cutoff

Back 24

Steam

Front 25

The ____ type low-water cutoff requires frequent "blow-down" (or flushing) to rid its sediment that can collect in its chamber

Back 25

float

Front 26

The piping directly around the boiler is known as near boiler piping and should ______ be replaced when installing a replacement steam boiler.

Back 26

Always

Front 27

The supply piping risers coming out of the boiler should be ______

Back 27

sized per manufacturers instructions

Front 28

All supply tappings coming out of the boiler are found ______

Back 28

on or near the top of the boiler.

Front 29

When piping multiple risers from a boiler into a common header, swing joints are used to _____

Back 29

accommodate the expansion and contraction of the piping and the boiler

Front 30

In sizing the header, the pipe must be sized _____

Back 30

Specifically per manufacturers instructions

Front 31

When installing the boilers header, you must allow a minimum of ____ between the boiler waterline and the header centerline.

Back 31

24 inches

Front 32

Always ____ the vertical drop into the equalizer pipe

Back 32

reduce the header after

Front 33

The ______ allows condensate to return immediately to the boiler and keeps the water from being pushed back through the return piping as the steam pressure increases.

Back 33

Equalizer line

Front 34

When installing a Hartford Loop on a residential steam boiler, the short nipple should be installed in the Tee in the equalizer line.....

And for commercial?

Back 34

2 inches below the waterline for rezzy

4 inches below the waterline for commercial

Front 35

In piping multiple system take-off risers, it is recommended that they are piped out of the header ____

Back 35

between the equalizer and the closest boiler riser to the equalizer

Front 36

Installing a bullhead tee in the piping is an excellent way of eliminating water hammer.

True or false.

Back 36

It is by far the absolute most retarded way to eliminate water hammer... It only causes it.

Therefore the answer is FALSE

Front 37

Check valves are _____ an acceptable replacement to Hartford Loop piping

Back 37

Never an acceptable method

Front 38

The cold water fill pipe should be connected _____ (There are 3 blanks)

Back 38

1) Below the waterline

2) Into the condensate return piping

3) As far from the boiler as possible.

Front 39

For a basic one-pipe steam system, the proper pitch for the system main should be a minimum of ____, from where the main begins to where it drops into the wet return.

Back 39

1 inch per 20 feet

Front 40

The _____ rapidly expels air out of the system main

Back 40

Quick vent

Front 41

The proper placement of a quick vent is ____

Back 41

15 inches from the end of the main

Front 42

The length of the radiator riser, from the main to the radiator should be at least _____

Back 42

3 feet

Front 43

The radiator riser is connected to the radiator through _____ which is fully opened to control the flow of steam into the radiator.

Back 43

a supply valve

Front 44

The radiator air vent _____ when steam enters it, thus keeping the steam in the radiator.

Back 44

closes

Front 45

_____ air vents allow you to adjust the speed at which the air escapes from the radiator.

Back 45

Adjustable

Front 46

Balancing the system means that _____

Back 46

by using adjustable air vents you can control the speed of steam arriving at individual radiators.

Front 47

The system main can carry both steam and condensate in the same direction at the same time. True or false.

Back 47

True.

Front 48

The _____ is that portion of the return main located above the boiler water level.

Back 48

Dry return.

Front 49

The _____ is always completely filled with water.

Back 49

Wet return.

Front 50

"Dimension A" refers to _____ (There are three blanks)

Back 50

1) The pressure drop of the system.

2) The static head of the system.

3) A safety factor in the system.

Front 51

For a steam system under 100,000 BTUs there should be a minimum dimension of _____ from the vertical drop of the dry return to the boiler waterline.

And what is it for over 100,000 BTUs

Back 51

18 Inches for under 100M BTU

28 inches for over 100M BTU

Front 52

Steam and condensate flow in the same direction in _____ steam piping systems

Back 52

One-pipe parallel flow

Front 53

In _____ steam piping systems the condensate and steam flow in opposite directions

Back 53

One-pipe counter flow

Front 54

A one pipe counter-flow steam piping system requires the system main to be pitched _____

Back 54

1 inch per 10 feet

Front 55

A _____ steam piping system carries steam and condensate in separate pipes

Back 55

Two-way

Front 56

The _____ located at the end of the radiator in a two-pipe steam system discharges air and condensate from the radiator.

Back 56

Thermostatic trap

Front 57

Two-pipe steam systems use _____ on the radiators rather than air vents.

Back 57

Traps

Front 58

A _____ allows both air and condensate to be quickly discharged directly out of the system main.

Back 58

Float and thermostatic trap

Front 59

Newer steam boilers are designed to steam at full capacity _____ before the low-water cutoff shuts off the boiler.

Back 59

For ten to fifteen minutes.

Front 60

If a water feeder is used to increase steaming time, it may cause _____ of the boiler.

Back 60

Flooding

Front 61

The _____ can be used to provide additional water fro the boiler to help increase steaming time.

Back 61

Reservoir pipe

Front 62

If the condensate is too slow in returning to the boiler causing the low-water cutoff to cycle off too quickly, this may indicate that _____

Back 62

There is an obstruction in the piping system.

Front 63

All steam piping systems include at least a _____ (3 blanks)

Back 63

1) System riser and system main

2) Radiator riser with swing joints

3) Condensate return piping system.

Front 64

Every _____ steam boiler should be skimmed. (3 blanks)

Back 64

1) New

2) Existing

3) Replacement

Front 65

If a steam boiler is not cleaned, _____ may occur. (3 blanks)

Back 65

1) Loss of efficiency

2) Erratic operation

3)Surging

Front 66

Oil, grease, or other foreign matter floating on the boiler water surface _____ the proper operation and steaming of the boiler.

Back 66

Can severely affect

Front 67

When skimming the boiler, you should raise the water to _____ of the skim tapping

Back 67

The center

Front 68

One good method that you can use to observe the water level when skimming a boiler is to _____

Back 68

Install a tee in the skim piping.

Front 69

During the skimming process the boiler water temperature should be _____

Back 69

Just below steaming

Front 70

A typical skimming of a steam boiler may take _____ to complete

Back 70

Several hours

Front 71

After skimming, the boiler should be filled with fresh water and steamed for _____ to eliminate dissolved gases from the make-up water.

Back 71

15 minutes

Front 72

Boiler chemicals should _____ in a steam boiler.

Back 72

Only be used if necessary

Front 73

If skimming doesn't clean the boiler, it is acceptable to use _____ , soaking for 20-30 minutes in the boiler until its water has a pH of 7.0 to 8.5 (3 blanks)

Back 73

1) Trisodium phosphate

2) Sodium hydroxide

3) Sodium carbonate

Front 74

When using one of the recommended boiler chemical cleaners, it is a good practice to steam the boiler so that the chemicals will clean the whole piping system. True or false?

Back 74

False.

Front 75

Many steam boiler service calls can be solved by simple _____ the boiler.

Back 75

Skimming and flushing.