An increase in pressure will cause the boiling temperature of a liquid to decrease.
True or False
False
It is possible to boil water at 78 degrees F.
True or False
True
When steam is superheating, its pressure and temperature are increased.
True or False
False
A low-pressure steam boiler is designed to operate at pressures up to 30 psig.
True or False
False
The line that supplies steam directly to the heating units is called a dry supply.
True or False
False
A compound gage should never be installed on a low-pressure steam boiler.
True or False
False
Thermodynamic steam traps operate due to the difference in the thermal energy or heat content between the steam and the condensate.
True or False
True
The discharge of condensate from an inverted bucket steam trap is continuous.
True or False
False
An inverted bucket steam trap should be installed if a large amount of air must be quickly removed from a steam system.
True or False
False
The water level in a boiler feed pump receiver is mechanically maintained.
True or False
True
Steam mains should be pitched in the direction of flow.
True or False
True
Reducing the pipe size in a horizontal steam main requires the use of a concentric reducer.
True or False
False
Unreamed system piping may cause water hammer.
True or False
True
When pipe is heated, its length and width are increased.
True or False
True
Steam mains, piping, etc. that are tied into a dry return must utilize a steam trap.
True or False
True
Cast-iron boilers are only manufactured in small sizes for residential use.
True or False
False
A mechanical water feeder must be installed on a boiler that is supplied by a boiler feed pump.
True or False
True
A dry pipe must be used in the design of a boiler to insure the delivery of dry steam.
True or False
False
Boiler blow down can be either surface or bottom blow down.
True or False
True
A swing check valve cannot be used as a vacuum breaker.
True or False
False
Heat that can be indicated with a thermometer is called ____
Sensible Heat
The type of heat that is absorbed or liberated when a substance undergoes a change of state is ___
Latent Heat
The instantaneous change of state from a liquid to a vapor which takes place when a liquid flows from a high to a low pressure area, without a corresponding drop in temperature, is called ___
Flashing
The device that controls the pressure in a low-pressure steam boiler is called a ___
Pressuretrol
The safety relief valve that is installed on a low-pressure steam boiler opens when the boiler pressure reaches ___
15 psig and reseats at 12 psig
A pipe siphon (pigtail) forms a water seal that prevents raw steam from entering and damaging the ___
Pressure gage
The two basic types of low-water cutoffs are ___
Float type and electric probe type
The line that connects the steam header to a boiler return line is the ___
Equalizing line
The arrangement of the return piping on a steam boiler that would reduce the likelihood of a low water condition in the boiler is called a/an ___
Hartford loop
The return that cannot contain air or steam is called a ___
Wet return
The return line that could contain air, steam or water is called a ___
Dry return
That "A" dimension, the length of pipe used to overcome the pressure drop in a one-pipe gravity steam heating system, should be ___
28" long
Pockets of condensate in steam lines could result in ___
Water hammer
The device that prevents a vacuum from forming inside a one-pipe gravity return steam heating system is a/an ___
Air vent
The carryover of small particles of water into steam piping is known as ___
Priming
The rapid fluctuation of the water level in a boiler which is created by impurities on the surface of the water is called ___
Foaming
Steam flow into the radiators in a one-pipe gravity return steam heating system can be controlled by ___
Installing an air vent with a different air venting capacity
A thermostatic trap that failed in the closed position would cause a heating unit to become ___
Waterlogged
Condensate in steam lines could result in ___
Water hammer
In a two-pipe gravity return system, the device that prevents raw steam from entering the condensate return piping is a ___
Steam trap
The pump motor on a condensate receiver is usually started by ___
A high water level in the reciever
The pump motor on a boiler feed pump is started when there is ___
A low water condition in the boiler
The device that is used to regulate the discharge pressure of condensate pump is a ___
Plug cock
High-pressure boilers are usually rated in boiler horsepower and operate at pressures above ___
15 psig
The fireside surfaces in a water-tube boiler are cleaned using a ___
Soot blower
Certain fittings and accessories are required by codes for a boiler to operate safely and efficiently. What organization is primarily responsible for development of these codes?
ASME
The main vent in a one-pipe gravity return steam heating system should be located ___ to ___ inches from the end of the last steam carrying main.
15, 18
Steam traps remove ___ and ___ from steam lines.
Water, air
A ___ is used to protect condensate pumps from dirt, slag, etc.
Strainer
Steam boilers that are operated up to ___ are called low-pressure boilers.
15 psig
A dry return line can contain air, steam or water.
True or False
True
Steam flow into radiators in a two-pipe gravity return steam heating system cannot be regulated.
True or False
False
Pockets of condensate in steam lines could result in priming.
True or False
False
The safety relief valve on a low-pressure steam boiler will open at 30 psig and close at 27 psig.
True or False
False
Flashing is the instantaneous change of state from a liquid to a vapor that takes place when a liquid flows from a high to a low pressure area without a corresponding drop in temperature.
True or False
True
An increase in pressure will cause the boiling temperature of a liquid to increase.
True or False
True
The supply and return piping in a vacuum steam heating system is one size smaller than it is in a mechanical condensate return system.
True or False
True
In a vapor steam heating system, circulation is created by a vacuum pump.
True or False
False
Under no conditions can condensate from a low pressure steam trap be elevated into a low-pressure condensate return main.
True or False
False
In a closed feedwater heater, water and steam do not come into direct contact with each other.
True or False
True
Pockets of condensate in steam lines could result in priming.
True or False
False
The safety relief valve on a low-pressure steam boiler will open at 30 psig and close at 27 psig.
True or False
False
Priming is caused by the carryover of small particles of water droplets into the steam piping.
True or False
True
Latent heat can be indicated with a thermometer.
True or False
False
The type of heat that is absorbed or liberated when a substance undergoes a change of state is specific heat.
True or False
False
Flashing is the instantaneous change of state from a liquid to a vapor that takes place when a liquid flows from a high to a low pressure area without a corresponding drop in temperature.
True or False
True
An increase in pressure will cause the boiling temperature of a liquid to increase.
True or False
True
It is possible to boil water at 50 degrees F.
True or False
True
An inverted bucket steam trap should not be installed in a steam heating system if large amounts of air are present in the system and they must be quickly vented.
True or False
False
Reducing the pipe size in a horizontal steam main requires the use of a concentric reducer.
True or False
False
The water level in the condensate receiver serving a boiler feed pump is mechanically maintained.
True or False
True
The device which forms a water seal that prevents raw steam from entering and damaging pressure gages, vaporstats, pressuretrols, etc. is a/an:
Pigtail
In a one-pipe gravity return steam heating system, the main vent should be installed:
15 to 18 inches back from the end of the last steam carrying main
A thermostatic steam trap that fails in the closed position would cause a heating unit to become:
Waterlogged
If the float in a F&T trap failed and filled with water, the trap would:
No condensate would be discharged
In order to return condensate to a boiler, the height of the water column needed to overcome is:
28 inches for each pound of pressure the boiler is producing
Superheater tubes are protected from waring or burning out by:
circulating steam through them
To increase the life of furnace refractory, water-tube boilers are equipped with:
Water walls
The bottom of a steam main must be at least 15 to ___ inches above the boiler water line.
18
The Hartford loop should be tied into the equalizing line 2 to ___ inches below the water line in a steam boiler.
4
With a constant flow of steam passing through a steam main, a decrease in pipe size would cause a/an ___ in velocity.
Increase
A draft fan located between a boiler and the chimney is used in an ___ draft system.