Ch. 5

Question 1

322. The popping pressure of a safety valve must be:
     a. Lower on the economizer than the main steam drum
     b. Higher on the main steam drum than the air preheater
     c. Lower on the main steam drum than the superheater
     d. Higher on the main steam drum than on the superheater
     e. The same on the main steam drum as on the superheater

Answer 1

d. Higher on the main steam drum than on the superheater

Question 2

323. Safety valves should be opened manually to:
     a. Release internal pressure
     b. Remove sludge
     c. Lower boiler water level
     d. Test the operation of the valve
     e. Test the low water fuel cut off

Answer 2

d. Test the operation of the valve

Question 3

324. Safety valves:
     1) Prevent loss of production in a plant
     2) Prevent bursting of the boiler drum
     3) Release steam to the atmosphere
     4) Are not required on boilers
     a. 1, 2, 3, 4
     b. 1, 2
     c. 2, 3
     d. 3, 4
     e. 1, 3

Answer 3

c. 2, 3

Question 4

325. To increase the popping pressure of a safety valve:
     a. The adjusting ring is screwed upward
     b. The adjusting screw is moved upward
     c. The adjusting ring is screwed downward
     d. The adjusting screw is moved downward
     e. The spring is replaced

Answer 4

d. The adjusting screw is moved downward

Question 5

326. To increase the blow down of a safety valve:
     1) Increase the spring tension
     2) Increase the port openings
     3) Screw the adjusting ring upwards
     4) Decrease the port opening
     a. 1, 2
     b. 2, 3
     c. 2, 4
     d. 1, 3
     e. 3, 4

Answer 5

e. 3, 4

Question 6

327. The purpose of the lip or feather on a safety valve seat:
     1) Increases the force of steam acting on the seat
     2) Allows the valve to pop open
     3) Allows simpler construction of the valve
     4) Makes no difference in operation
     a. 1, 2, 3, 4
     b. 1, 2
     c. 2, 3
     d. 3, 4
     e. 1, 2, 3

Answer 6

b. 1, 2

Question 7

328. Safety valves:
     1) Shall be attached as close as possible to the boiler drum
     2) Shall be attached in an upright position with the spindle vertical
     3) Shall have a discharge line attached
     4) Shall have no valve placed between the boiler and the safety valve
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 1, 2, 4
     d. 2, 3, 4
     e. 1, 3, 4

Answer 7

c. 1, 2, 4

Question 8

329. A safety valve:
     1) Which discharges shall be located or piped clear of platforms or running boards
     2) Must have a gravity drain installed in the discharge line where condensate may collect
     3) Shall have an open gravity drain in the valve casing below the seat
     4) Has no discharge pipes in some cases
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 3, 4
     e. 1, 2, 4

Answer 8

a. 1, 2, 3, 4

Question 9

330. Every boiler must be fitted with at least one pressure gauge:
     a. To indicate the steam flow from the boiler
     b. To indicate that it is on or off line
     c. To indicate the pressure in the boiler
     d. To indicate the pressure in the steam header
     e. To indicate the water level in the boiler

Answer 9

c. To indicate the pressure in the boiler

Question 10

331. A water gauge glass:
     1) Indicates how much steam is in the boiler
     2) May be connected directly to a boiler
     3) Must have a water column connected to the boiler first
     4) Indicates how much water is in the boiler
     a. 1, 2, 4
     b. 2, 3, 4
     c. 1, 2
     d. 2, 4
     e. 1, 3, 4

Answer 10

d. 2, 4

Question 11

332. During the operation of a boiler, it is extremely important to maintain the correct water level:
     1) To prevent the gas burner from fluctuating
     2) To prevent water carry over
     3) To prevent hot spots
     4) To protect the alternator
     a. 1, 2, 3, 4
     b. 1, 2
     c. 1, 4
     d. 2, 3
     e. 1, 2, 3

Answer 11

d. 2, 3

Question 12

333. The water column:
     1) Acts as a reservoir
     2) Dampens the agitation
     3) Tends to trap any sludge or sediment
     4) Provides a place for the installation of alarm floats
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 3, 4
     e. 1, 2, 4

Answer 12

a. 1, 2, 3, 4

Question 13

334. Water gauge glasses have:
     1) Quick closing type valves in the steam and waterside
     2) Valves with convenient handles, that could be remotely operated if needed
     3) Drain valves, which are slow opening
     4) No drain valves
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 1, 2, 4
     d. 2, 3, 4
     e. 1, 3, 4

Answer 13

b. 1, 2, 3

Question 14

335. Flat glass gauges:
     1) Are used for pressures above 2750 kPa
     2) Are used on water tube boilers only because they are cooler
     3) Consist of two glass plates, which are bolted to a steel forged housing
     4) Are lined with thin sheets of mica
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 1, 3, 4
     d. 2, 3, 4
     e. 1, 2, 4

Answer 14

c. 1, 3, 4

Question 15

336. When repairing a gauge glass:
     1) The boiler gauge glass should not be under pressure
     2) The steam and water connections should be closed and the drain valve should be open
     3) The operator should wear a face shield before pressuring up the glass
     4) The steam and water connection should be blown out before installing the new glass
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 3, 4
     e. 1, 2, 4

Answer 15

a. 1, 2, 3, 4

Question 16

337. Low-water fuel cut-offs:
     a. Cannot be automatically reset
     b. Do not act as an interlock device
     c. May have a float or electrode chamber
     d. Cannot be adversely effected by heat
     e. Not required on automatically fired steam boilers

Answer 16

c. May have a float or electrode chamber

Question 17

338. A boiler explosion due to overheating of the heating surfaces may result from:
     a. Improper furnace purge
     b. A faulty low gas pressure switch
     c. A low-water cut-off malfunction
     d. Combustion air switch failure
     e. A faulty flame scanner

Answer 17

c. A low-water cut-off malfunction

Question 18

339. Low water level fuel cut-offs:
     1) Are required when a boiler is not under continuous attendance by a certified operator
     2) Are required on fire tube boilers only
     3) Must be installed so that they cannot be rendered inoperative
     4) Must be tested under operating conditions
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 1, 3, 4
     d. 2, 3, 4
     e. 1, 2, 4

Answer 18

c. 1, 3, 4

Question 19

340. A low water level fuel cut-off device:
     1) Shuts the fuel off to the boiler when the air flow drops
     2) Shuts the fuel off when the burner pressure is low
     3) Protects the boiler from overheating
     4) Shuts the main fuel valve during a low water condition
     a. 1, 2, 3
     b. 1, 2
     c. 2, 3
     d. 3, 4
     e. 1, 2, 4

Answer 19

d. 3, 4

Question 20

341. Low water level fuel cut-off devices:
     1) Usually have mercury switches
     2) Are usually float operated
     3) May be used to activate alarms as well as shutting off the fuel supply
     4) Are usually located in float chambers
     a. 1, 2, 3, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 3, 4
     e. 2, 3

Answer 20

a. 1, 2, 3, 4

Question 21

342. The low water level fuel cut-off device:
     1) Should be blown down every shift
     2) Should be blown down once a week
     3) Has a drain valve installed at the bottom connection
     4) Is blown down to prevent sediment build up
     a. 1, 2, 3, 4
     b. 1, 3, 4
     c. 1, 2, 3
     d. 2, 3, 4
     e. 1, 2, 4

Answer 21

b. 1, 3, 4

Question 22

343. Which of the following do not require steam stop valves?
     1) Safety valve
     2) Main steam header
     3) Reheater
     4) Superheater
     a. 1, 3, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 2, 3, 4
     e. 1, 2, 4

Answer 22

a. 1, 3, 4

Question 23

344. Steam stop valves:
     1) Can be of the gate or globe type
     2) Can be high or are high pressure valves
     3) May have drain valves located on the lower part of the valve body
     4) Can be of flanged type construction
     a. 1. 2
     b. 2, 3
     c. 2, 3, 4
     d. 1, 2, 3, 4
     e. 1, 2, 4

Answer 23

d. 1, 2, 3, 4

Question 24

345. When two or more boilers are connected to a common main:
     1) It is recommended that each boiler be equipped with an automatic stop-and-check valve.
     2) The automatic stop-and-check valve should be located closest to the boiler.
     3) They should have stop valves located between the main and the automatic stop and check valve.
     4) The space between stop-and-check valve and boiler stop valve shall be provided with an adequate drain.
     a. 1, 2, 4
     b. 1, 2, 3
     c. 2, 3, 4
     d. 1, 3, 4
     e. 1, 2, 3, 4

Answer 24

e. 1, 2, 3, 4

Question 25

346. A non-return valve: 1) Can be a globe type valve 2) Can be an angle type valve 3) Is the same as a stop-and-check valve 4) Prevents a backflow of steam from the header to the boiler a. 1, 2, 3, 4 b. 1, 2, 3 c. 2, 3, 4 d. 1, 3, 4 e. 1, 2, 4

Answer 25

a. 1, 2, 3, 4

Question 26

347. A non-return valve: 1) Can use a piston to cushion the valve upon opening 2) Can use a spring to cushion the valve upon opening 3) Does not need anything to cushion the valve upon opening 4) Opens when the boiler pressure exceeds the main steam header pressure a. 1, 2, 4 b. 1, 2 c. 1, 4 d. 3, 4 e. 2, 4

Answer 26

a. 1, 2, 4

Question 27

348. The purpose of the non-return valve is: a. To drain water out of the main steam header b. To prevent the back flow of steam c. To prevent water from entering the steam header d. To prevent the safety valve from popping e. To prevent steam from entering the steam header

Answer 27

b. To prevent the back flow of steam

Question 28

349. The piping between the non-return valve and the stop valve has a drain valve: 1) To help warm up the header 2) To indicate if there is steam flowing from the boiler 3) To indicate the pressure in the line 4) To drain the condensate out of the header a. 1, 2, 3, 4 b. 1, 2 c. 1, 3 d. 1, 4 e. 1, 2, 4

Answer 28

d. 1, 4

Question 29

350. The blow-off connection to a boiler: 1) Is made to the lowest point of the boiler 2) Is used to drain the boiler 3) Is used to blow out mud and sediment 4) Is used to lower the concentration of dissolved impurities a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 3, 4 d. 1, 2, 4 e. 2, 3, 4

Answer 29

a. 1, 2, 3, 4

Question 30

351. The ASME code required that the blow off piping: 1) Shall be painted to indicate a hot pipe. 2) Shall not be less than 25 mm and not greater than 64 mm in size. 3) Is exposed to direct furnace heat so it shall be protected by heat resistant material. 4) Shall be of flanged connections. a. 1, 2 b. 2, 3, 4 c. 3, 4 d. 1, 2, 3, 4 e. 2, 3

Answer 30

e. 2, 3

Question 31

352. Every steam boiler having a working pressure exceeding 103 kPa: 1) Shall be equipped with two approved blow-off valves. 2) Must have at least one slow-opening blow-off valve. 3) Must have two slow-opening blow-off valves. 4) Must have two quick-opening blow-off valves. a. 1, 4 b. 1, 2, 4 c. 1, 2 d. 3, 4 e. 1, 3

Answer 31

c. 1, 2

Question 32

353. Steam boilers: 1) Normally do not have blow-off valves. 2) Are normally equipped with one slow-opening and one quick-opening blow-off valve. 3) May be equipped with one slow-opening and one quick-opening blow-off valve. 4) Normally have two quick-opening blow-off valves. a. 1, 2, 3 b. 1, 2 c. 2, 3 d. 3, 4 e. 1, 3

Answer 32

c. 2, 3

Question 33

354. When a boiler has a quick-opening and a slow-opening blow-off valve: 1) The slow-opening valve is next to the boiler. 2) The quick-opening valve is next to the boiler. 3) It does not matter which one is next to the boiler. 4) It does matter which one is next to the boiler. a. 1, 2, 4 b. 3 c. 1, 4 d. 2, 4 e. 1, 2, 3

Answer 33

d. 2, 4

Question 34

355. A slow-opening blow-off valve: 1) Refers to the amount of time taken to open it. 2) Refers to the amount of time taken to close it. 3) Is one which requires at least five 360 degree turns to fully open or to fully close it. 4) Is located down stream of a quick-opening blow-off valve. a. 1, 3, 4 b. 3, 4 c. 1, 3 d. 1, 4 e. 2, 3, 4

Answer 34

b. 3, 4

Question 35

356. A slow opening blow-off valve: 1) Creates less water hammer than a quick-opening blow-off valve. 2) Creates more water hammer than a quick-opening blow-off valve. 3) Creates the same amount of water hammer as a quick-opening type. 4) Is opened after the quick-opening valve. a. 1, 4 b. 2, 4 c. 3, 4 d. 4 e. 3

Answer 35

a. 1, 4

Question 36

357. Which of the following is the correct procedure, when blowing down a boiler with both a quick-opening and a slow-opening blow-off valve? a. Open the slow-opening valve, then open the quick-opening valve. After blowing down: close the quick-opening valve, then close the slow-opening valve. b. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the quick opening valve, then close the slow-opening valve. c. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve. d. Open the slow-opening valve, then open the quick-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve. e. It does not matter which valve is opened first. After blowing down, it does not matter which valve is closed first.

Answer 36

c. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve.

Question 37

358. All blow-off pipes, valves and fittings must be: 1) Painted to prevent corrosion. 2) Of heavy construction corresponding to the boiler pressure. 3) Installed without sharp bends. 4) Able to expand and contract without being restricted. a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 3, 4 d. 2, 3, 4 e. 1, 2, 4

Answer 37

d. 2, 3, 4

Question 38

359. The purpose of the blow-off tank: 1) Is to measure the amount of water being blown down from the boiler. 2) Is to prevent steam and hot water from going directly to the sewer. 3) Is to reduce the pressure and the temperature of the water entering the sewer. 4) Is to prevent damage to the sewer system. a. 1, 2, 3, 4 b. 1, 2, 3 c. 2, 3, 4 d. 1, 3, 4 e. 1, 2, 4

Answer 38

c. 2, 3, 4

Question 39

360. What are drum internals? a. The riser tubes b. The downcomer c. The fittings located within the boiler drum d. The internal shell e. The fittings attached to the boiler drum or shell

Answer 39

c. The fittings located within the boiler drum

Question 40

361. The removal of impurities from the steam is extremely important because: 1) The boiler uses too much fuel 2) They will form deposits in the superheater tubes 3) The over heating of the tubes will result 4) Deposits will be formed on the turbine blades a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 2, 4 d. 1, 3, 4 e. 2, 3, 4

Answer 40

e. 2, 3, 4

Question 41

362. The purpose of removing moisture from steam: 1) Is to lower the solids concentration of the steam 2) Is to lower the erosion effect on turbines 3) Is to save water make up to the boiler 4) Is to save money on the operation of the boiler system a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 2, 4 d. 1, 3, 4 e. 2, 3, 4

Answer 41

c. 1, 2, 4

Question 42

363. The purpose of the steam washer is: 1) To scrub the incoming water 2) To absorb any gaseous impurities in the steam 3) To prevent excessive water make up to the boiler 4) To prevent silica build up in the superheater tubes a. 2, 3, 4 b. 2, 4 c. 2, 3 d. 1, 3 e. 1, 4

Answer 42

b. 2, 4

Question 43

364. The internal feed pipe: 1) Serves to distribute the incoming feedwater uniformly along the length of the drum 2) Helps prevent scale build up 3) Prevents temperature shock 4) Help prevents turbulence a. 1, 3, 4 b. 2, 3, 4 c. 1, 2, 3 d. 2, 3 e. 1, 2, 4

Answer 43

a. 1, 3, 4

Question 44

365. The purpose of the continuous blow-down connection is to ______. a. lower the concentration of dissolved solids in the boiler water b. keep the water at the correct level in the gauge glass c. keep the steam pressure correct d. blow the sludge out of the mud drum e. lower the boiler feed water flow to the boiler

Answer 44

a. lower the concentration of dissolved solids in the boiler water

Question 45

366. The advantage of the continuous blow down compared to the bottom blow off: 1) Is that the valve is smaller to operate 2) Is that it is much more accurate to control the water concentration 3) Is that it can be used with a heat exchanger for economy 4) Is that it replaces the bottom blow-off completely a. 1, 2 b. 2, 3 c. 1, 2, 3 d. 2, 3, 4 e. 1, 2, 4

Answer 45

b. 2, 3

Question 46

367. A gate valve: 1) Has less restriction in a line than a globe valve 2) Should be operated either fully opened or fully closed 3) Is used to throttle flow 4) Is used for different applications than a globe valve a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 3, 4 d. 1, 2, 4 e. 2, 3, 4

Answer 46

d. 1, 2, 4