Equipment test

Match each of the parts of the furnace to the correct name.

1 damper 2 convection section 3 shock bank 4 refractory 5 radiant tubes 6 burners

Steam is used in:

distillation column, turbines drivers, and heat exchanges

The inlet line to the lower (drum)header.

downcomer

Liquid water is separated from steam in the upper drum by which of the following methods.

dry pipes, centrifugal moisture separators, and plate dryers

A section of the boiler utilized to preheat feed water before it enters the main boiler system.

economizer section

An economizer preheats air usually by waste heat from flue gases.

false

The air register controls draft in a furnace.

false

The damper in a process furnace controls the amount of combustion air and excess oxygen in the burners.

false

A type of boiler that passes hot gases through tubes to heat up and vaporize water.

fire tube boiler

The section of the furnace that reaches the highest temperature is the:

firebox

When a section of a furnace tube gets too hot from coke beginning to form:

flame impingement

Ensuring proper air concentration is critical because:

fuel burns cleaner and hotter if air mixture is correct. fuel burns poorly and cooler if air mixture is incorrect

If flames impinge on the tubes within a furnace what is likely to happen.

hot spots will begin to form

Four draft types utilized on furnace designs are:

induced, balanced, natural, and mechanical

A steam trap that operates by opening or closing a bellows as the temperature changes. This movement opens and closes a valve.

mechanical steam trap

Most fired furnaces use:

natural gas and kerosene

Boiler load is most closely defined as a:

pants demand for steam

Furnaces are used in processes such as:

preheating process fluids

Carbon deposits are most likely to be found in the:

radiant tubes

What is the primary method of heat transfer in the firebox of a boiler? Choose one answer.

radiation

Process furnaces areinsulated by a brick-like material called ____. Choose one answer.

refractory

Flow moves in the opposite direction in these tubes.

riser and downcomer

The downcomer is connected to:

steam generating drum and mud drum

Steam that is separated from liquid water and heated to a higher temperature is called ________. This type of steam is usually used to drive turbines.

super heated

What is the purpose of a steam trap?

to remove condensate

An air preheater heats air usually by using waste heat from flue gases

true

Some furnaces and boilers are equipped with soot blowers. The purpose of the soot blower is to remove soot.

true

Scale buildup on the inside of boiler tubes is caused by dissolved solids in the boiler feed water. What can happen if the scale buildup goes unchecked?

tube rupture

Select three operating problems associated with steam generation.

tube rupture, soot buildup, and flame impingement

What is a stoker used for?

used to burn solid fuels for heat energy

There are two types of boilers. They are _____ tube and ____ tube.

water and fire

Slugs of water can damage equipment and lead to a condition known as:

water hammer

Following are the steps to take when starting up a furnace. Put them in the proper order. Each correct response is worth 1 point.

1.inspect the furnace 2.Purge any raw fuel from the furnace with air or steam 3.Light-off the pilots in the proper order 4.Light-off the burners in the proper order 5.Adjust the burner registers and the stack dampener for proper operation

What is normally the maximum rate of temperature change that should not be exceeded when a boiler or a furnace is started up or shut down?

150 per hour

An air preheater is a:

Cost saving system used to heat the air before it enters the burner

Identify each of the parts of the boiler.

a. boiler stack b. desuperheated steam c. steam drum d. super heated steam e. risers f. mud drum g. down comers economizer

Fired furnaces may have single or multiple burners mounted either in the floor or in the wall.

burner

Used to evenly distribute air and fuel vapors over an ignition source and into a boiler firebox.

burner

When coke forms on the inside of the tubes of a fired furnace how is it normally removed the majority of the time?

by introducing super heated steam to burn off the coke

Fired furnaces come in three design types, select these three types.

cabin, box,and cylindrical

Carbon deposits found inside furnace tubes:

coking

As steam flows from the boiler to the plant it begins to cool and become a liquid. What is the technical name for this material?

condensate

Tubes located above the shock bank.

convection tubes