low pressure steam quiz

Question 1

what is the min size safety relief valve permitted on a steam boiler

Answer 1

3/4”

Question 2

how is a boiler safety valve capacity selected for a given boiler rating based on the boiler _____ rating

Answer 2

output

Question 3

what is the method used to determine a boilers efficiency?

Answer 3

net output divided by gross input

Question 4

what is the purpose of the hartford loop piping configuration used on a cast iron boiler?

Answer 4

prevents loss of boiler water in the event of a failure of the return piping

Question 5

the basic purpose of a steam trap is to prevent the HTU from flooding with ________

Answer 5

condensate

Question 6

a steam trap operates by sensing the presence of condensate and ______

Answer 6

opens

Question 7

which force moves heat energy through a low pressure steam heating system?

a. high temp
b. pump head pressure
c. system pressure
d. all of the above

Answer 7

d. all of the above

Question 8

how does a steam boiler differ from a hydronic boiler?

a steam boiler utilizes a steam ______

Answer 8

drum

Question 9

what is the normal operating conditions in a steam heating system?

a. operating pressure levels are low
b. max pressure level is 15 Psig
c. operating temp is dependant on operating pressure
d. all of the above

Answer 9

d. all of the above

Question 10

what effect would higher operating pressure have on low pressure steam heating systems?

Answer 10

noise caused by velocity movement

Question 11

what is used on most modern higher capacity steam heating system, to return condensate to the boiler?

Answer 11

pumped condensate return

Question 12

what are try cocks on a level gauge used for?

Answer 12

verifyinf boiler water level

Question 13

what is the purpose of the pigtail piping arrangement used to connect controls and gauges to the boiler?

Answer 13

protects the control or gauge from live steam

Question 14

how does a one pipe steam system return condensate to the boiler?

Answer 14

gravity system piping installed above the boiler

Question 15

what is the purpose of the air vent on a cast iron radiator?

Answer 15

prevents air from stopping the flow of steam into the radiator

Question 16

which device allows for zone control of a steam heat system?

Answer 16

a control valve

Question 17

what normal pressures might be expected throughout the year from a low pressure stam heat syste,?

Answer 17

0 Psig to normal operating pressure

Question 18

what is the difference between a water tube boiler and a fire tube boiler?

Answer 18

water tube boilers pass water through the tubes

Question 19

what advantage would a steel boiler have over cast iron boiler?

Answer 19

steel boilers have a higher pressure rating

Question 20

why are cleanout crosses required when connecting LWCO’s to a boiler?

Answer 20

they allow for rodding of the piping connection to the boiler

Question 21

what is the purpose of a blow down valve on the bottom of the boiler?

Answer 21

clears the mud drum of sludge and sediment