Chapter 4- Steam Systems

Question 1

What are three things that Steam System accessories are used for?

Answer 1

They are used to collect, control, and distribute steam at the proper pressure

Question 2

What Steam System Accessories have in common?

Answer 2

Steam valves, steam headers, heating units, steam traps, and steam strainers

Question 3

What is a Main Steam Stop Valve?

Answer 3

Is the valve used to cut in on-line or take the boiler off-line

Question 4

What is a Steam Header?

Answer 4

Is a distribution pipe that supplies steam to branch lines

Question 5

By cutting the boiler in on-line where does the steam flow?

Answer 5

To cut the boiler in on-line allows steam to flow from the boiler Into the steam header

Question 6

What does OS and Y valve stand for?

Answer 6

OS and Y valves stands for outside stem and yoke valve

Question 7

What is a Outside Stem and Yoke valve?

Answer 7

Is a gate valve that indicates whether it is open or closed by the position of the stem

Question 8

What is the ASME code for the boilers in battery?

Answer 8

All boilers in battery (interconnected) Must have two main steam stop valves or one main steam stop valve and one automatic non-return valve

Question 9

What is a non-return valve or a automatic nonreturn valve?

Answer 9

Is a type of globe valve that allows a boiler to cut in online automatically when the boiler pressure is at or above the header pressure and allows the boiler to take off-line automatically if the pressure in the boiler drops below the header pressure

Question 10

What happens when steam changes direction in a globe valve?

Answer 10

As the steam changes directions in the globe valve, flow is restricted, resulting in a drop in steam pressure

Question 11

What are expansion bands and expansion joints used in steam lines?

Answer 11

Expansion bends and expansion joints in steam lines allow movement from expansion and contraction without causing damage to the piping

Question 12

What is Lagging?

Answer 12

Is jacketing material used to protect pipe installations from mechanical damage

Question 13

What is a heating unit?

Answer 13

Is a heat exchanger such as a radiator in which heat is transported by steam or hot water is transferred to air in the building space

Question 14

What is a steam trap?

Answer 14

Is a steam system accessory that removes air and condensate from steam lines in heating units.

Question 15

What is water hammer?

Answer 15

Is a condition where a hammering or banging sound is created in steam lines when water is carried along with the steam and hits elbows valves and other obstructions.

Question 16

What is a return steam trap?

Answer 16

Is a steam trap that removes condensate from steam lines in heating units and discharges it directly to the boiler

Question 17

What is a non-return steam trap?

Answer 17

Is the steam trap that removes condensate from steam lines and heating units and discharges it to the condensate return tank

Question 18

What are the four common types of non-return steam traps?

Answer 18

Thermostatic steam trap, float thermostatic steam trap, inverted bucket steam trap, and the thermodynamic steam trap

Question 19

What is a thermostatic steam trap?

Answer 19

Is a steam trap that has a bellows filled with a fluid that boils at steam temperature

Question 20

What is a float thermostatic steam trap?

Answer 20

Is the steam trap that has a ball float that opens and closes a discharge valve depending on the amount of condensate in the chamber

Question 21

What is an inverted bucket steam trap?

Answer 21

Is a steam trap in which team enters the bottom and flows into inverted bucket

Question 22

What is a thermal dynamics steam trap?

Answer 22

Is a steam trap that has a single movable desk that raises to allow the discharge of air in cool condensate

Question 23

What is steam bound?

Answer 23

Is a condition that occurs when the temperature in the vacuum tank, condensate return tank or feedwater Heater becomes too high and water flashes to steam and prevents water from being pumped to the boiler

Question 24

What is the temperature Indicating crayon?

Answer 24

Is a marking stick that melts at a specific temperature

Question 25

What is a flow indicator?

Answer 25

Is the device that allows the inspection of fluid through a pipe

Question 26

What is a ultrasonic tester?

Answer 26

Is a device used to test steam trap functions by comparing sound waves emitted during different load conditions would be properly operating steam trap

Question 27

What is a Infrared thermometer?

Answer 27

Is a device used to measure infrared radiation emitted from an object

Question 28

When testing steam traps what are the standard procedures that can save time and effort?

Answer 28

Number 1
Know the operating characteristics and the normal sounds a specific steam trap tested

Number 2 take measurements on steam traps operating properly for reference if problems occur on a similar steam traps

Number 3 compare the sounds of steam trap operating properly with a malfunctioning steam trap

Number 4 separate the sounds of the steam trap from other equipment sounds

Question 29

What is the steam strainer?

Answer 29

Is a boiler accessory that is located in the steam line before the steam trap to remove foreign matter from steam that could cause a steam trap malfunction