In order to avoid scale formation and corrosion in the _____, the make up water for the feedwater supply must be properly treated
dearator
boiler
furnace
tank
When examining the waterside surfaces, the inspector looks for signs of corrosion, pitting and ________ of the metal.
bulging
blistering
cracking
wearing
During the high-pressure flush, the blowdown valves should be disconnected, if possible, to prevent them from getting plugged with _________
water
dirt
rust
scale
Moisture absorbing material should be placed on trays inside the drums to absorb moisture from the ________
metal
tubes
air
fuel
Inert gas, such as nitrogen, is connected to the drum vent to maintain approximately ______ kpa, positive pressure.
100
35
325
500
When the pressure in the boiler steam drum drops to ______kPa, the drum vents are to be opened to avoid the formation of a vacuum within the boiler.
170
1000
Which of the following is not a common cause of furnace explosions
failure to purge the furnace adequately before start-up
admission of fuel to main burner before pilot flame or other ignition source is established.
Loss of id fan
attempting to light one burner off other burners, in operation
incorrect amount of air supplied to the burner can resulting in incomplete combustion
The operator must be familiar with manual operation of the ______system, in case of a system failure
generator
control
___________ storage is preferable for boilers that are out of service for an extended period of time or in locations where freezing temperatures.
Dry
Short
Wet
Long
In order for the gauge glass to show the correct level, all connections to the gauge glass and the water column, must be ______ to ensure they are clear and free from obstructions.
tight
purged
blowndown
unblocked
