Steam

Question 1

T or F
Safety boiler water feeder combinations are designed to maintain a normal water line in the boiler?

Answer 1

T

Question 2

Draw a steam station

Label the components.

We will also have to do a material takeoff for items needed.

Answer 2

Question 3

T or F

A steam pop safety valve is adequate protection on a low pressure boiler to prevent damage?

Answer 3

F

You have fusible plugs, lwco, lwco feed water pump combos as well as a Hartford loop in COMBINATION with a steam pop safety valve.

Question 4

T or F

Steam main should be pitched up in the direction of of flow.

Answer 4

F

Question 5

T or F

Return mains should be pitched up in the direction of flow.

Answer 5

F

Question 6

Mechanical traps operate on the _______________ between the steam and the condensate.

Answer 6

Difference in Density

Question 7

Reduces the pipe size in a horizontal steam main requires the use of ___________ reducer.

Answer 7

Eccentric

Question 8

The lowest safe water line in a boiler should not be lower than the ______________ of the gauge glass.

Answer 8

Lowest visible part

Question 9

A conventional float-operated low water fuel cutoff will turn off the _________ but will not mechanically feed water to the boiler.

Answer 9

DA BURNA!!

< the burner>

Question 10

Explain what happens to a boiler when the water line drops below the minimum safe level.

Answer 10

It enters a low water condition which could lead to catastrophic failure.

Question 11

Name three main parts of a heating system.

Answer 11

Heating source (boiler)

Distribution System (pipe)

Terminal Units

Question 12

Explain the difference between an air vent and an air vacuum valve.

Answer 12

Thermostatic vent heats up and opens up letting non condensables out.

Vacuum air vent allows a partial vacuum . Thermostatic does not.

Question 13

Name three methods of returning condensate to the boiler.

Answer 13

Gravity
Pressure
Mechanical

Question 14

Define a package boiler.

Answer 14

A packaged boiler is one furnished by the manufacturer that includes all of the necessary accessories for operation.

Question 15

List the four functions of boiler connections.

Answer 15

Safety ( pop safety valve)

Controls ( combination low water cutoff)

Pressure Sensing ( gauge)

Temperature Sensing ( thermometer)

Question 16

What causes the bucket of an inverted bucket trap to rise closing the valve at the top of the trap?

Answer 16

When steam reaches the trap, it collects at the top of the bucket, imparting buoyancy. The bucket then rises and lifts the valve towards its seat.

Question 17

In a mechanical condensate return steam heating system, what flows in the dry return?

Answer 17

Air, steam, or condensate flows in the dry return.

Question 18

A combination feeder low water cut-off will function regardless of a source of what?

Answer 18

Make up water, the lwco feed water combo will shut off the burner no matter if the correct amount of water is made up via the feed water device or not.

Question 19

In a mechanical condensate return steam heating system, by what means is the condensate returned to the boiler?

Answer 19

A condensate receiver with a condensate pump.

Question 20

What is the purpose of the water gauge on the boiler?

Answer 20

The water gauge let’s the operator see the level of water in the boiler via a sight glass.

Question 21

Name three sources of heat loss that must be considered when determining the initial steam pressure in a system.

Answer 21

Air elimination
Draining of fluids
Pressure differential.

I still need to verify this answer with Worth.

Question 22

Where is the proper location for the steam gauge to be connected?

Answer 22

Directly to the boiler at its highest point of the steam vessel.

Question 23

Explain the function of a steam trap.

Answer 23

A steam trap permits air and any non-condesables to flow out of the heating units or steam piping into the condensate return piping without allowing live steam to escape.

Question 24

Why is it important for the pipefitter to understand the correct procedures in the installation of boiler accessories.

Answer 24

So the boiler can run safely and efficiently.

Question 25

Why does an angle pattern trap make the connector easier to install?

Answer 25

It allows more working space connections.

Question 26

What is the purpose of connecting the blow down piping to a blow down tank or other apparatus before going to the sanitary sewer?

Answer 26

To allow the water to cool down to a safe temperature before it is exposed to atmosphere.

Question 27

What Is the purpose of the Hartford loop?

Answer 27

Creates and inverted seal providing positive protection against emptying of the boiler due to the failure of return boiler piping.

Question 28

In what three ways are steam systems classified?

Answer 28

Vacuum system

Low-Pressure System

High-Pressure system

Question 29

In a mechanical condensate return steam heating system, what flows in the riser?

Answer 29

Mainly condensate and steam. Air may also be present.

Question 30

Water hammer is caused from?

Answer 30

Steam coming into contact with pockets of condensate that might have collected due to incorrect installation of piping. Pitch, valves, strainers, reducers etc.

Question 31

In a mechanical condensate return heating steam heating system, what flows in the supply loop?

Answer 31

Steam is what is supplied to the terminal units.

Question 32

Explain why a pipe siphon is used with a steam gauge.

Answer 32

It forms a water seal that prevents raw steam from entering a gauge and damaging it.