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WorksheetsHigh Pressure Boilers Chapter 7
Total questions: 25
Worksheet time: 13mins
burning fuel releases __
solar energy
hydrogen gas
heat energy
none of the above
a vent line on a fuel oil tank prevents ___ when filling the tank with fuel oil and also prevents a vacuum from developing when fuel oil is removed
loss of suction
pressure build up
loss of pressure
none of the above
a high suction line on a fuel tank is used when ___
the tank is full
the tank is low on fuel
signs of sludge and water are evident in the tank
changing over tanks
the purpose of the fuel oil return line is to ___
circulate fuel oil during warm up
return fuel oil that bypasses the burner
return fuel oil from the relief valve
all of the above
in both steam and air atimizing burners, atomization is accomplished by __
live steam or air
high fuel oil pressure
the sprayer plate
low temperature, high pressure fuel oil
the amount of gas going to the burner at startup in a highpressure gas system is controlled by a solenoid controlled __ valve
globe
gate
check
diaphragm
pulverized coal burns ___
on inclined grates
in suspension
in suspension and on grates
in the pulverizer
an indication of a dirty fuel oil strainer would be __ across the strainer
large pressure drop
an equalizing of pressure
slight pressure drop
no change in pressure
duplex strainers are found on __ of the fuel oil pump
the suction side
the discharge side
both the suction and discharge sides
none of the above
fuel oil heaters must always be used when burning No.__ fuel oil
1
2
4
6
a safety relief valve is used to protect against excessive fuel oil ___ that could damage the shell of a fuel oil heater
temperature
flow
pressure
none of the above
A rotary cup burner atomizes fuel oil using ___
oil pressure
a spinning cup only
high velocity air only
both a spinning cup and high velocity air
In a pressure atomizing burner, atomization is accomplished by __
high pressure gas in the burner blower
rotating, high pressure oil coming out of the plug or sprayer plate
air or steam mixing with oil
the low temperature, high pressure oil supplied to the burner
a gas pressure regulator is used to control the ___
flow of the gases of combustion
desired gas pressure at the burner
air flow going to the burner
mixture of air and gas
a solenoid valve is a direct acting valve in the gas system used __
to regulate the flow of gas to the burner
to regulate the flow of air to the burner
as an automatic gas shutoff valve
as a gas return valve
to prevent caking and to dry the coal entering a pulverizer ___
heating coils are used
electric pipe heaters are used
warm air is used
dryers are used
blowers are used in a high pressure gas system to __
supply air for combustion
introduce gases of combustion into the burner
regulate the flow of gas
cool the combustion chamber
the air fuel ratio can be maintained by a ___
air damper
butterfly valve
modulating motor and linkage
all of the above
the thickness of the fuel bed on a chain grate stroker is regulated by a coal ____
conveyor
scale
hopper
gate
boilers are equipped with a combination gas/ fuel oil burner to allow ___
higher cost
more flexible operation
safer operation
higher rates of combustion
spreader strokers burn coal __
only in suspension
only on grates
in suspension and on grates
in retorts
to achieve complete combustion in a spreader stoker, air is introduced ___
under and over the fuel bed
only under the fuel bed
only over the fuel bed
using an induced draft fan
the amount of NO(x) decreases as the ___
combustion temperature increases
combustion temperature decreases
premixing decreases
flue gas recirculation decreases
an above ground storage tank (AST) is a tank and any underground piping connected to the tank that has less ___% of is combined volume underground
10
25
50
75
___ is an emissions control method in which ammonia gas is introduced over a catalyst located in a module that is installed in the boiler exhaust stack
NO(x) reduction technology
ammonia reactor mixing (ARM)
Ammonia emissions control (AEC)
selective catalytic reduction (SCR)
