Exam (elaborations)
stationary engineer
- Module
- 3rd Grade Engineer.
- Institution
- 3rd Grade Engineer.
Exam of 10 pages for the course 3rd Grade Engineer. at 3rd Grade Engineer. (stationary engineer)
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stationary engineer3 Condenser Types - ANS-air-cooled condensers, water-cooled condensers, and
evaporative condensers. The evaporative condenser uses a combination of air and
water as its condensing medium. Most residential systems have an air-cooled
condenser.
Absolute Humidity - ANS-Absolute Humidity
The weight of water vapor in a given amount of air space. Absolute humidity is
measured by grains per cubic foot.
absolute pressure - ANS-gauge pressure (psi) + atmospheric pressure (14.7 psi) at sea
level
ABT - ANS-Automatic Bus Transfer, utility to UPS
AIR ATOMIZING OIL BURNER - ANS-A burner for firing oil in which the oil is atomized
by compressed air, which is forced into and through one or more streams of oil which
results in the breaking of the oil into a fine spray
air changes per hour - ANS-The hourly ventilation rate divided by the volume of a
space. For perfectly mixed air or laminar flow spaces, this is equal to the number of
times per hour that the volume the space is exchanged by mechanical and natural
ventilation.
Air conditioner - ANS-An appliance, system, or mechanism designed to dehumidify and
extract heat from an area.
Air Ejector - ANS-Type of Jet Pump used to remove air and other gases from a
condenser
Air Register - ANS-Device in the casing of a boiler, used for regulating the amount of air
for combustion and to provide a circular motion of air.
AIR VENT - ANS-A valved opening in the top of the highest drum of a boiler or pressure
vessel for venting air.
, ALKALINITY - ANS-Represents the amount of carbonates, bicarbonates, hydroxides
and silicates or phosphates in the water and is reported as grains per gallon, or ppm as
calcium carbonate.
Alloy - ANS-Mixture of 2 or more metals
Ammeter - ANS-Instrument for measuring rate of flow of electrical current in amperes
Annealing - ANS-Softening of metal by heating and slow cooloing
AQUASTAT - ANS-Water limit temperature control, a safety device often used on
boilers.
Atmospheric Pressure - ANS-Atmospheric Pressure
The weight of a 1 square inch column of the earth's atmosphere. At sea level this
pressure is 14.696 pounds per square inch.
ATOMIZER - ANS-A device by means of which a liquid is reduced to a very fine spray.
Automatic Combustion Control System (ACC) - ANS-A system that provides a means
for automatically controlling fuel and air mixture
AVAILABLE DRAFT - ANS-The draft which may be utilized to cause the flow of air for
combustion or the flow of products of combustion.
Back Pressure - ANS-Pressure exerted on the exhaust side of a pump or engine
BAFFLE - ANS-A plate or wall for deflecting gases or liquids.
BAROMETRIC PRESSURE - ANS-Atmospheric pressure as determined by a
barometer usually expressed in inches of mercury.
BDC - ANS-Bottom Dead Center
BDS Blowdown Separators - ANS-BDS Blowdown Separators
Precision Boilers' blowdown separators are used to temper high pressure boiler water to
an acceptable drain temperature. They are used where space constraints preclude the
use of blowdown tanks.
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