Chapter 1-6

Question 1

Why is perfect combustion unobtainable

Answer 1

Stoichiometry combustion is perfect combustion it is a theoretical combustion where all fuel and air is used in the combustion

Question 2

What is m a w p

Answer 2

Max allowable working pressure

Question 3

What are the different systems that allows steam boiler to operate

Answer 3

Steam system. feed water system. draft system. fuel system

Question 4

What are the two laws of thermodynamics

Answer 4

First law - conservation of energy - energy cannot be created or destroyed

2nd law - entropy of isolated systems always increases. “ hot to cold”

Question 5

What is. NOLW

Answer 5

Normal operating water level

Question 6

What’s the difference between a fire tube and a water tube boiler

Answer 6

A fire tube boiler has water in the vessel fire in the tubes

A water tube boiler has water in the tubes fire around the tubes

Question 7

What is the purpose of a steam siphon?

Answer 7

Keep Steam from hitting the gauge.

Question 8

What is the most important boiler fitting?

Answer 8

Safety valve – relief

Question 9

What’s the difference between a pop test and a try lever test?

Answer 9

Try lever test is perform preferably / recommended one time a month a try lever test is only done for a short time and allowed to read receipt

A pop test is performed by bringing the boiler up to safety valve pressure and allowing it to reseat it is performed once a year

Question 10

What is the difference between a boiler fitting and a boiler accessory?

Answer 10

Boiler fitting – is attached directly to the boiler

Boiler accessory – is in the boiler piping

Question 11

What boiler fitting is used so we can get an accurate water level in a gauge glass?

Answer 11

A water column – MacDonald Miller

Question 12

What is the purpose of blowing down a gauge glass and water column?

Answer 12

Blowout / down sludge in water column and fittings remove buildup up ensures accurate level also test low water cut out device function

Question 13

Define flash theme?

Answer 13

Flash theme is created when pressurized condensate is exposed to atmospheric pressure this excess energy is used to convert a portion of the condensate into steam this phenomenon is called flash steam

Question 14

Define water hammer?

Answer 14

Water hammer is a shock wave – momentum change - pressure surge

Question 15

What’s the purpose of the steam system in a steam boiler?

Answer 15

The steam system is used to distribute collect and control Steam send steam to terminal units and or process use

Question 16

Does a high limit control have to be manually reset explain your answer?

Answer 16

Yes, a high limit needs to be manually reset because the high limit has been set to not exceed a certain temperature due to design or or operator set point if high limit is exceeded a understanding of why this has happened needs to be investigated. a limit is a boiler safety.

Question 17

What is the purpose of the feed water system?

Answer 17

To maintain / Supply water to the boiler from a condensate/deaerator tank 4 conversion into steam

Question 18

What is the purpose of makeup water

Answer 18

To ensure water lost to evaporation use or leaks is made up / refilled

Question 19

What is the difference between suction head and suction lift?

Answer 19

Suction head - pressure above the suction of the pump

Suction lift – negative pressure the pump has to pull up before the pump can begin work

Question 20

What is the difference between a return and non return steam trap?

Answer 20

Return - condensate return line returns directly to the boiler

Non-return – condensate return line returns to a condensate tank

Question 21

What are the four kinds of non-return traps?

Answer 21

Thermostatic, thermostatic float, thermodynamic, inverted bucket

Question 22

Define steam bound

Answer 22

Inlet of the pump is bound up by steam - stuck not allowing water to flow.

Question 23

What are some ways to test a steam trap,?

Answer 23

Heat crayons, temperature meter, delta-t, conductivity

Question 24

What are two things that steam traps remove from a steam Line & heating units ?

Answer 24

Air and steam

Question 25

What work do pumps do

Answer 25

Pumps do not pump they create a pressure differential

Question 26

What collects on pipe as scale?

Answer 26

Calcium carbonate , magnesium carbonate

Question 27

Water level identifier

Answer 27

Primary- water column / Gage glass

Auxiliary required by code

Question 28

What is steam saturation

Answer 28

Steam saturation is water vapor in equilibrium with liquid water at or above the normal boiling point