Definition 1 of 120
shuts off the burner when the boiler is low on water.
The steam space is
The factor of evaporation is?
The number of complete turns required between opened and closed on a slow opening
valve is
The low-water cutoff
Term 2 of 120
The pressure-sensitive device attached to the fan housing of a fully automatic burner that starts
operating when there is a fan failure is sometimes called a(n)?
aquastat
vaporstat
thermostat
pressuretrol
Term 3 of 120
Heat may be transferred in how many ways?
Remove sludge and sediment
Three ways - radiation, conduction, convection
Exposed to the flame and flue gases
Between the check valve and the feedwater pump
,Term 4 of 120
In a high-temperature hot water boiler, what would cause a tube to overheat?
1,000 bhp.
Poor circulation (plugged tube)
Refractory.
High economizer feed water outlet temp
Term 5 of 120
At what temperature does steel start to rapidly lose its strength?
338 Degrees F
1,500 Degrees F
1,000 Degrees F
700 Degrees F
Term 6 of 120
What is the relationship between longitudinal stress and circumferential stress?
There is no fixed relationship between the two.
1,000 bhp.
Longitudinal stress is twice circumferential stress.
They are the same.
,Term 7 of 120
To check the water level in the gauge glass of a steam boiler,
use the bottom blowoff valve
use the trycocks
water
blow down the low-water cutoff
Term 8 of 120
A tube in a fire-tube boiler is surrounded by?
water
steam
remove sludge and sediment
air
Term 9 of 120
Only one bottom blowdown valve is required for boilers under
100 PSI MAWP
99 Psi Mawp
500 Psi Mawp
500 ft^2 of heating surface
, Term 10 of 120
The maximum size of boiler blowdown lines, valves, and fittings shall not exceed?
1 inch
3/4 inch
2-1/2 inches
3-6/2 inches
Definition 11 of 120
only for low-pressure plants
Heat may be transferred in how many ways?
Water walls are found
Cast iron boilers can be used
Handholes and manholes are oval shaped
Term 12 of 120
The boiler vent valve is located on the?
use the trycocks
separate moisture from steam as it leaves the drum
exposed to the flame and flue gases
to of the steam drum
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