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LOW PRESSSURE BOILERS FINAL EXAM GRADED AND ANSWERED #17
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LOW PRESSSURE BOILERS FINAL EXAM GRADED AND ANSWERED #17
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LOW PRESSSURE BOILERS FINAL EXAM GRADED AND ANSWERED#17
4 MAIN BOILER SYSTEMS - correct answer FUEL, DRAFT, FEEDWATER ,STEAM
DRAFTS TYPES - correct answer NATURAL ,MECHANICAL( INDUCED, FORCED)
Water Hammer - correct answer A condition where a hammering or banging sound is
created in steam lines when water is carried along in lines and hits elbows, valves, and
other obstructions.53
Try Cocks - correct answer Valves located on the water column used to determine the
water level if the gauge glass is not functional.47
Blowdown - correct answer The process of evacuating water and undesirable
accumulated material.49 DONE ON LOW AND LIGHT FIRE
BOILER VENT - correct answer A boiler fitting used to vent air from inside the boiler.60
CARRY OVER - correct answer A condition that occurs when small particles of boiler
water are carried over into steam lines.53
Priming - correct answer Slugs of boiler water carried into steam lines.53
Types of AIR - correct answer PRIMARY,SECONDARY,EXCESS,INCOMPLETE,
THEORETICAL pg 15
Types of combustion - correct answer PERFECT,COMPLETE,INCOMPLETE
Spontaneous pg 15
British Thermal Unit (BTU) - correct answer Amount of heat energy required to raise the
temperature of 1 lb of water 1 degree Fahrenheit.126
Combination burner - correct answer A fuel system that can use natural gas or fuel
oil.140
GAS VALVE TRAIN - correct answer
TYPES OF WATER - correct answer
Chilled Water System - correct answer is a cooling system in which water or other liquid
is chilled and circulated to the building space
Condenser - correct answer A heat exchanger that removes heat from a high pressure
refrigerant
, Compressor - correct answer a mechanical device that compresses refrigerant vapor.
The Most Important Rule - correct answer the most important rule for the safe
operations of boilers is to maintain the proper water level at all times and as constant
level as conditions will permit. If the water is not visible shut the boiler down.
Outdoor air is - correct answer positive
Makeupwater - correct answer is added water added to the boiler to replace lost water
from steam leaks, blowdown, and other losses in the system.53
Draft - correct answer The flow of air or gases or combustion caused by a difference in
pressure between two points.167
Air Types - correct answer supply ,return ,makeup ,exhaust, mixed , outdoor(vent)
Return air is negative or positive - correct answer NEGATIVE
TYPES OF BLOW DOWN - correct answer SURFACE,WATER COLUM,GAGUE
GLASS,BOTTOM
Blowdown - correct answer The process of evacuating water and undesirable
accumulated material.49
BOTTOM BLOW DOWN - correct answer 1.How is sludge removed.54
2.Valves located on the blowdown line used to release water from the bottom of the
boiler.52
3.Piping located at the lowest point of the water side of a boiler.52
Gauge glass - correct answer a tubular glass Colum that indicates the water level in a
boiler .47
Water Hammer - correct answer A condition where a hammering or banging sound is
created in steam lines when water is carried along in lines and hits elbows, valves, and
other obstructions.53
SURFACE BLOWDOWN VALVE - correct answer A valve located on the surface
blowdown line used to release water and surface impurities from the boiler.56
Water column - correct answer A boiler fitting that reduces the turbulence of boiler water
to provide an accurate water level in the gauge glass.47 opened for 5-10 secs each shift
Chattering - correct answer is a rapid opening and closing of safety valve.35
Types of Pressure controls - correct answer operation control, high limit , modulating
control pg65
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