Steam Boilers Tech Check 9

Question 1

Pressure gauges are calibrated in pounds per——-

A, square foot
B. cubic inch
C. vertical inch
D. square inch

Answer 1

D. square inch

Question 2

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

Answer 2

B gauge pressure plus atmospheric pressure

Question 3

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

Answer 3

B. 1 ½ to 2 times the safety valve setting

Question 4

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

Answer 4

C. highest part of the steam side

Question 5

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

Answer 5

D. a siphon

Question 6

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

Answer 6

B. to take and read the readings for remote plants centrally

Question 7

vacuum gauges are calibrated in inches of———-
atmospheric pressure

A. mercury below
B. water below
C. mercury above
D. water above

Answer 7

A. mercury below

Question 8

Most thermometers used in a steam plant are calibrated in

A. psig
B. psia
C. degrees Fahrenheit
D. degrees kelvin

Answer 8

C. degrees Fahrenheit

Question 9

Thermocouples measure———–

A. gauge pressure
B, absolute pressure
C. temperature
D. heat

Answer 9

C. temperature

Question 10

A reading can be read using a thermocouple———-

A superheated steam
B. gases of combustion
C, condensate return
D, all of the above

Answer 10

D, all of the above

Question 11

Liquids in a tank may be measured from a remote location using a—————-

A. pneumercator
B. thermocouple
C. pressure control
D. tank chart

Answer 11

A. pneumercator

Question 12

Flow meters measure the rate of flow of—————-

A gases only
B. liquids only
C. solids
D. a variety of fluids

Answer 12

D. a variety of fluids

Question 13

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

Answer 13

D. all of the above

Question 14

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

Answer 14

B. ball in a tapered tube

Question 15

The types of variable-area flow meters are——— and——

A. rotameter; valve
B. pressure; globe valve
C. temperature; pressure
D. temperature, gate valve

Answer 15

A. rotameter; valve

Question 16

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

Answer 16

C. give an overall view of the steam plant operation

Question 17

A Ringelmann chart is used to determine———–

A. atmospheric conditions
B. smoke density
C. combustion efficiency
D. fuel oil density

Answer 17

B. smoke density

Question 18

Light and a photoelectric cell are sometimes used to indicate—————–

A., a Ringelmann reading
B. atmospheric conditions
C. smoke density
D. draft conditions

Answer 18

C. smoke density

Question 19

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

Answer 19

D. the boiler operator cannot always see the chimney to observe smoking conditions

Question 20

Modern steam plants use instrumentation to————-

A. decrease productivity
B. promote safe and efficient operation
C. reduce plant maintenance
D. comply with insurance regulations

Answer 20

B. promote safe and efficient operation