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Practice Questions builder? Adamson Ring ? - ANS-* which of the following is a hinged joint between two or more
____ furnace and may be be located in the center or the furnace, with ____ then 18'
apart
* when the static pressure at the suction of the pump falls below vapor pressure
corresponding to its temperature - ANS-* what is meant by becoming steam bound?
1 BTU - ANS-How many BTU's does it take to rise 10lbs of steam from 40° to 41°?
10% of the highest set value - ANS-what is the maximum range of pressure setting of all
the saturated steam safety valves on boilers?
134A - ANS-a replacement refrigerant for R-12 medium and high temperature
refrigerant application is?
146,000 - ANS-what is the BTU content of a Gallon of #4?
150.79 - ANS-*What is the Total force acting on a 4inch Diameter safety valve disc with
a boiler pressure of 12psi?
formula: TF=PxA
TF= Px(DxDx.7854)
TF= 12psi x 4x4x.7854 =
160 - ANS-*what is the area of a steam engine cylinder reading 10X24, when the
position is only traveling at 2/3 of the way
formula : (10x24x2/3) =
20-40 - ANS-* what is the normal sodium sulfite in a boiler?
2500 - ANS-* A boiler is rated at (86,250lbs, 88,250lbs, & 96,250lbs) of steam per hour,
what is the equivalent boiler horse power? formula: divide by 34.5
3 : over pressure, Over heating, & Fire side Explosions - ANS-How many things do
safety controls protect against?
30-70 - ANS-what is the acceptable range for residual sodium sulfite in the boiler
maintain?
, 360 - ANS-how many BTU's to raise 2lbs of water from 32°F to 212°F
6.0 - ANS-* what is the safety factor of 1200psi, and the max pressure is 200psi?
1200/200=6
6' High - ANS-Every discharge pipe on a safety valve should be at least
_____________?
6% - ANS-when a safety valve discharges, us should relieve the boiler so that the
pressure does not exceed more then _________?
78.57 - ANS-* A boiler has 2800°F furnace temperature and a 600°F stack temperature
reading, what is the boiler efficiency?
Formula: input - loss divided by input x 100
2800-600 x 100 =
8.6 - ANS-* what is the total hardness of a softner reading .5 grains?
A qualified person from Manufacturer or a manufacturer rep. - ANS-Who can make
adjustments or repairs on a safety valve?
A Terminal Reheat - ANS-An air handler unit supplies a constant supply air temperature
of 55° to building spaces and includes a coil is called a ____________ AHU?
A Tube Turbine - ANS-What mechanical device is used to remove scale from water tube
boilers?
A type of check valve located below the normal level of the tank, attached to the end of
the suction line of the pump, used to keep the suction line full to facilitate starting. -
ANS-* where in a system is a foot valve value installed and what is its purpose?
A water tube boilers biggest advantage over a fire tube boiler is the flexibility to increase
capacities and pressures - ANS-* which of the following statements is true concerning
fire and water tube boilers?
allow pressure to build up to 75% before lifting the test lever - ANS-* what is the proper
way to test a safety valve?
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