Steam Boilers Tech Check 9 Flashcards
Pressure gauges are calibrated in pounds per——-
A, square foot
B. cubic inch
C. vertical inch
D. square inch
D. square inch
Absolute pressure is equal to———-
A. gauge pressure minus atmospheric pressure
B gauge pressure plus atmospheric pressure
C. atmospheric pressure
D. gauge pressure plus steam pressure
B gauge pressure plus atmospheric pressure
A boiler steam pressure gauge should have a range of———
A. 1 to 1 ½ times the safety valve setting
B. 1 ½ to 2 times the safety valve setting
C. 2 to 2½ times the safety valve setting
D. 10% of the MAWP
B. 1 ½ to 2 times the safety valve setting
The boiler steam-pressure gauge must be connected to the of———– the boiler.
A lowest part of the steam Ride
B. lowest part of the water side
C. highest part of the steam side
D. highest part of the water side
C. highest part of the steam side
The boiler steam-pressure gauge is protected from high temperatures by————
A. a metal frame
B. steam gauge guards
C. a blower
D. a siphon
D. a siphon
A primary reason for using thermocouples for measuring temperatures is———
A. economy
B. to take and read the readings for remote plants centrally
C. to promote boiler efficiency
D. to promote plant efficiency
B. to take and read the readings for remote plants centrally
vacuum gauges are calibrated in inches of———-
atmospheric pressure
A. mercury below
B. water below
C. mercury above
D. water above
A. mercury below
Most thermometers used in a steam plant are calibrated in
A. psig
B. psia
C. degrees Fahrenheit
D. degrees kelvin
C. degrees Fahrenheit
Thermocouples measure———–
A. gauge pressure
B, absolute pressure
C. temperature
D. heat
C. temperature
A reading can be read using a thermocouple———-
A superheated steam
B. gases of combustion
C, condensate return
D, all of the above
D, all of the above
Liquids in a tank may be measured from a remote location using a—————-
A. pneumercator
B. thermocouple
C. pressure control
D. tank chart
A. pneumercator
Flow meters measure the rate of flow of—————-
A gases only
B. liquids only
C. solids
D. a variety of fluids
D. a variety of fluids
The differential pressure flow meter functions by receiving a difference of pressure across a(n)———–
A. venturi
B. orifice plate
C. flow nozzle
D. all of the above
D. all of the above
The rotameter flow meter consists of a————
A. ball in a straight tube
B. ball in a tapered tube
C. straight tube
D. tapered tube
B. ball in a tapered tube
The types of variable-area flow meters are——— and——
A. rotameter; valve
B. pressure; globe valve
C. temperature; pressure
D. temperature, gate valve
A. rotameter; valve
Recorders are used to————-
A. regulate steam output
B. regulate the air-to-fuel ratio
C. give an overall view of the steam plant operation
D. they have limited application in steam plants
C. give an overall view of the steam plant operation
A Ringelmann chart is used to determine———–
A. atmospheric conditions
B. smoke density
C. combustion efficiency
D. fuel oil density
B. smoke density
Light and a photoelectric cell are sometimes used to indicate—————–
A., a Ringelmann reading
B. atmospheric conditions
C. smoke density
D. draft conditions
C. smoke density
Smoke indicators are often essential because———–
A. they can indicate atmospheric conditions
B. they can secure the burner to prevent a furnace explosion
C. they can secure the burner to prevent a boiler explosion
D. the boiler operator cannot always see the chimney to observe smoking conditions
D. the boiler operator cannot always see the chimney to observe smoking conditions
Modern steam plants use instrumentation to————-
A. decrease productivity
B. promote safe and efficient operation
C. reduce plant maintenance
D. comply with insurance regulations
B. promote safe and efficient operation
