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1 DC BOILER EXAM ACTUAL EXAM & STUDY GUIDE ALL
300 QUESTIONS AND CORRECT DETAILED ANSWERS
ALREADY GRADED A+
DC BOILER EXAM ACTUAL EXAM
The setting or adjusting of a safety valve should only be done by a ___. - ANSWER-qualified person who is familiar with the construction and operation of the safety valve
The ___ is the operating pressure of a boiler as determined by the design and construction of the boiler in conformance with the ASME Code. - ANSWER-maximum allowable working pressure
The safety valve on a boiler must be capable of discharging all the steam the boiler can generate without the pressure increasing more than ___ above the MAWP. - ANSWER-6%
A(n) ___ test is a safety valve test performed to determine if a safety valve opens at the correct pressure. - ANSWER-pop
A fitting is a ___ and is required for the operation of the boiler. - ANSWER-component directly attached to a boiler
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2 Steam boilers having more than ___ sq ft of heating surface require two or more safety valves. -
ANSWER-500
___ is the predetermined pressure at which a safety valve opens and remains open until the pressure drops - ANSWER-Popping pressure
Electric boilers exceeding ___ kW of input require two safety valves. - ANSWER-500
Drains are placed at the lower section of safety valve discharge piping to ___. - ANSWER- remove any condensation that may form
A(n) ___ test is used to establish the relief capacity of boiler safety valves. - ANSWER- accumulation
The ___ is the part on a safety valve that increases the area of the safety valve disc to increase the total force. - ANSWER-huddling chamber
Safety valve ___ is a drop in pressure between popping pressure and reseating pressure as a safety valve relieves boiler overpressure. - ANSWER-blowdown
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3 Boiler safety valves are placed ___ of the boiler. - ANSWER-at the highest part of the steam space
The safety valve ___ is the amount of steam that can be relieved by a safety valve. - ANSWER- capacity
The boiler vent is located at the ___. - ANSWER-highest part of the steam side of the boiler
Cyclone separators are used to ___. - ANSWER-Separate water droplets from the steam
The ASME code will allow an automatic nonreturn valve to be used in place of one of the main steam stop valves. If a nonreturn valve is used, it must be ___. - ANSWER-located between the main steam stop valve and boiler shell
When cutting a boiler equipped with hand-operated main steam stop valves in on-line, the steam pressure on the incoming boiler ___. - ANSWER-should be slightly lower than line pressure
A ___ valve should be used as the main steam stop valve. - ANSWER-gate
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4 A steam separator is used to improve the quality of steam in order to ___. - ANSWER-prevent damage from water hammer
Hydrostatic pressure is caused by ___. - ANSWER-the weight of a column of water
A(n) ___ is located at the lowest part of the water side of a firetube boiler or the mud drum of a watertube boiler so that sludge and sediment can be removed from the bottom of the boiler. - ANSWER-bottom blowdown valve
A steam pressure gauge must be protected by a(n) ___ to prevent steam from damaging the gauge. - ANSWER-steam siphon
Saturated steam is steam that is ___. - ANSWER-in equilibrium with water at the same temperature and pressure
When steam is superheated, the temperature ___. - ANSWER-increases with no change in pressure
Superheater tubes are protected from warping or burning out by the ___. - ANSWER- continuous flow of steam
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