P99 LOW PRESSURE BOILERS
REVIEWED QUESTIONS AND CORRECT
ANSWERS
To increase efficiency of the boiler,
the heating surface is increased
____ causes false water level readings in the gauge
glass
foaming
A ____ pump returns condensate from the system
back to the boiler
vacuum
A ___ valve allows the flow of water in one direction
only
check
A _____ after each heating unit allows condensate to
pass through to the return line
steam trap
Water is supplied to the condensate return tank by the
____ pump
vacuum
I'm a low pressure gas burner, gas is mixed with air in
the
mixing chamber before the burner register
before repair work is attempted on a gas fired boiler
the
main gas cock must be secured
, in order to lower the viscosity of fuel oil, it is
necessary to __
increase its trmperature
In low pressure boiler operation, chemicals for
reducing oxygen and preventing scale can be added
using a ____
bypass feeder
When the low water fuel cutoff is blown down, ___.
the burner should shut off
the water column whistle valve is ____ during the
hydrostatic test
removed
New ___ should be used when replacing a broken
gauge glass.
packing nuts
A leak on gas lines and equipment must be repaired
___.
by authorized personnel
Water conveys approximately one- ____ the amount of
heat that steam conveys
fifth
In a natural circulation hot water heating system, the
____ functions as a relief valve
Expansion tank
A pressure reducing valve reduces the pressure of
city water to approximately ___ psi
12 to 18
In a compression refrigeration system, liquid
refrigerant under high pressure is allowed to drop in
pressure by the _____
expansion valve
REVIEWED QUESTIONS AND CORRECT
ANSWERS
To increase efficiency of the boiler,
the heating surface is increased
____ causes false water level readings in the gauge
glass
foaming
A ____ pump returns condensate from the system
back to the boiler
vacuum
A ___ valve allows the flow of water in one direction
only
check
A _____ after each heating unit allows condensate to
pass through to the return line
steam trap
Water is supplied to the condensate return tank by the
____ pump
vacuum
I'm a low pressure gas burner, gas is mixed with air in
the
mixing chamber before the burner register
before repair work is attempted on a gas fired boiler
the
main gas cock must be secured
, in order to lower the viscosity of fuel oil, it is
necessary to __
increase its trmperature
In low pressure boiler operation, chemicals for
reducing oxygen and preventing scale can be added
using a ____
bypass feeder
When the low water fuel cutoff is blown down, ___.
the burner should shut off
the water column whistle valve is ____ during the
hydrostatic test
removed
New ___ should be used when replacing a broken
gauge glass.
packing nuts
A leak on gas lines and equipment must be repaired
___.
by authorized personnel
Water conveys approximately one- ____ the amount of
heat that steam conveys
fifth
In a natural circulation hot water heating system, the
____ functions as a relief valve
Expansion tank
A pressure reducing valve reduces the pressure of
city water to approximately ___ psi
12 to 18
In a compression refrigeration system, liquid
refrigerant under high pressure is allowed to drop in
pressure by the _____
expansion valve
