Plant Ops Chapter 64

a) 1, 2

b) 1, 3

c) 2, 3

d) 1, 2, 4

e) 3, 4

a) be done as quickly as possible

b) be done with low water so that metal heats up faster

c) be done slowly to minimize any differential expansion

d) be completed with a high firing rate

e) not involve any human intervention

a) of its high rate of differential expansion

b) it may burn if not cured

c) it may corrode if not cured

d) it contains moisture which can cause it to fracture if not cured

e) of the length of time it takes it to heat up

a) drying out the top and bottom drum

b) igniting the dryers in the top drum

c) drying out the new refractory

d) empty the boiler out

e) drying out the entire boiler before start-up

a) 2, 3, 4

b) 1, 2, 3, 4

c) 1, 3, 4

d) 1, 2, 3

e) 2, 4

a) 1, 2, 4

b) 2, 3, 4

c) 1, 2, 3, 4

d) 1, 3, 4

e) 2, 3

a) prevent a vacuum from forming in the boiler

b) release the air from the boiler

c) purge the shell of impure gases

d) let the operator know when the pressure has reached zero

e) prevent pressure build-up in the boiler

a) check the safety valve settings

b) fill out the log book

c) check that water column and gage glass connections are clear

d) talk to his supervisor

e) check the chemical tank levels

a) at operating pressure

b) before the dry out procedure

c) at one-half the operating pressure

d) once a year

e) just before the annual inspection

a) tubes rupturing

b) a furnace explosion

c) nuisance shutdowns

d) an unwanted high rate of water circulation

e) a foaming condition occurring

a) the vent valve is a normally open valve

b) at least one of the main-line valves will always be open

c) the main-line valves will open before the prepurge stage

d) the main-line and vent valves all open together

e) the main-line valves are manually operated

a) must be done after every shut down of the boiler

b) must be done when the boiler inspector requests it

c) must be done every two years

d) is done with the owner's permission only

e) must be done before the boiler is ready for start-up

a) may include making sure the valves are in good operating condition

b) may include making sure the furnace refractory is in order

c) may include making sure the tubes are free of scale

d) must be done after the boiler has been drained

e) may include making sure the exterior of the tubes are in good condition

a) is the shortest step in the start-up sequence

b) can take place normally even if there is a low water condition

c) must be done manually on a fully automatic boiler

d) must last a specific amount of time

e) will take place at the end of a boiler shutdown

a) inform the Chief Inspector

b) do as little as possible with the waterside of the unit

c) use sootblowers and clean the fireside well

d) force cool the unit with post-purge air

e) drain the unit before the water cools to ambient temperature

a) it be properly warmed up

b) it be properly purged

c) it have a valid inspection certificate

d) the water supply system be in service

e) the waterside is boiled out

a) leave all drain valves closed

b) check the low water fuel cut-off device for proper operation

c) test the safety valve before any pressure develops

d) not interfere in any way with the combustion process

e) go through a sootblowing operation sequence

a) slightly more than 350 kPa

b) 700 kPa

c) slightly more than 700 kPa

d) slightly less than 350 kPa

e) slightly less than 700 kPa

a) as soon as the post-purge is completed

b) when all temperatures are at ambient value

c) any time after the NRV is closed

d) just before the unit goes into a vacuum

e) at no time

a) allow the superheater to warm up quicker

b) let the first steam produced act as a superheater coolant

c) ensure drum level does not drop

d) verify the operation of the steam flow transmitter

e) enhance boiler water circulation