Preparation Material for 3rd Class Stationary Steam Engineer License Exam, Exams of Classical Literature

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3rd class stationary steam engineer license prep exam

questions with verified answers.

1. _________ are necessary for complete combustion - Correct answer time, temperature, mixture, and atomization
2. if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______
   • Correct answer 214.
3. A boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blow down is______psi - Correct answer 12
4. an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-generator - Correct answer steam turbine
5. A boiler is producing 40,000lb of steam/hr. at a pressure of 100 PSI and a steam temperature of 500 degrees Fahrenheit. The steam produced is _______ steam - Correct answer superheated
6. the economizer on a boiler is used to _______ - Correct answer add heat to the feed water
7. blowers are normally used with________ boilers - Correct answer water tube
8. overheating of tubes on a boiler can be caused by________ - Correct answer scale on tubes
9. carbon dioxide in a condensate return system causes_________ - Correct answer channeling
10. a ________ pump is a positive displacement pump - Correct answer reciprocating
11. a boiler generating 6000 lb. of steam/hr. produces _______but/hr. - Correct answer 6,000,
12. a bottom blow down is performed on a boiler to _____ - Correct answer discharge sludge and sediment
13. water columns are connected to the boiler with a minimum of _______" pipe - Correct answer 1
14. The minimum size of a water column blow down valve is_______". - Correct answer 3/

15. The maximum size bottom blow down valve on a boiler is_________". - Correct answer 2 1/
16. A ________ allows condensate to pass through, but stops Steam. - Correct answer a steam trap
17. when taking over a shift, the first thing to do is check the________ - Correct answer water level in each boiler
18. according to the same code, a high-pressure boiler having more than 500 square feet of heating surface shall have________ - Correct answer two or more safety valves
19. the probable cause of an increase in temperature of gases of combustion at the boiler Outlet is____ - Correct answer dirty heating services
20. boilers in battery equipped with________ must have two main steam stop valves and a free-flowing drain between them - Correct answer manhole openings
21. in order to be sure the gauge glass is indicating an accurate water level reading, the stationary engineer should______ - Correct answer blow down the gauge glass
22. a continuous blow down line is located___ - Correct answer in the Steam and water drum well below the now
23. a temperature reading of 80 degrees Celsius is equal to_________°f - Correct answer 176
24. a chimney temperature of 250 degrees Fahrenheit above steam temperature indicates_______ - Correct answer poor efficiency
25. a manometer is red in________ - Correct answer inches of water
26. the boiling point of water will____ with an increase in pressure - Correct answer be raised
27. if a lather is not obtained when performing a soap hardness test, the water sample is_______ - Correct answer hard
28. combustion efficiency can be increased when air is________ - Correct answer preheated
29. ______ draft is produced by a fan located between the boiler and the chimney - Correct answer induced

46. The but content of number 6 fuel oil is approximately - Correct answer 18750 BTU / lb.
47. chemicals can be added to a boiler by a______pump - Correct answer proportioning
48. the feed water stop valve is found between the____ - Correct answer boiler and check valve
49. sensible heat is______ - Correct answer heat that can be measured with a thermometer
50. balanced draft is______ - Correct answer constant furnace pressure slightly below atmospheric pressure
51. a flame rod_______ - Correct answer ensures that the gas pilot is lighted
52. there are approximately_____but in 1 cu ft. of Natural Gas - Correct answer 1000
53. the pH of boiler water may be controlled by using ______ - Correct answer caustic soda
54. boiler water with a pH of 11 is________ - Correct answer alkaline
55. a scotch Marine boiler is easily identified because it_____ - Correct answer has a cylindrical internal furnace
56. the air flow switch at the burner fan housing________ - Correct answer and shows the primary air fan is functioning
57. the same code recommends that low water fuel cutoff switch be tested by an evaporation test__________ - Correct answer monthly
58. a neutral solution is_______ on the pH scale - Correct answer 7
59. a dry pipe separator _____ - Correct answer delivers higher-quality steam to the header
60. draft is carefully controlled to_____ - Correct answer completely burn fuel supplied to the burner
61. draft is measured with a_________ - Correct answer manometer
62. a rangeland test is used to determine_______ - Correct answer smoke density

63. a flame scanner proves (verifies) __________ - Correct answer pilot in Maine Flame
64. according to the same code, when warming up a boiler the air cock is closed when_______ - Correct answer the steam pressure gauge reads 25 psi
65. a motor rated at 25 horsepower delivering 20 horsepower is operating at_______ % capacity - Correct answer 80
66. a deposit of scale or mud in an HRT boiler could cause_____ - Correct answer a bag to develop
67. water wall tubes protect the refractory and_____ - Correct answer increase boiler heating surface
68. steam at E250 Pisa and 400 degrees Fahrenheit is considered______ Steam - Correct answer saturated
69. sensible heat is heat that_____ - Correct answer changes a substances temperature but not its state
70. extra-heavy pipe must be used on blow down lines when the steam pressure exceeds______ psi - Correct answer 125
71. to check the water level on a boiler online, it is best to_____ - Correct answer blow down the gauge glass
72. a steam pressure gauge has a siphon between the boiler and the pressure gauge to _______ - Correct answer prevent Steam from entering the pressure gauge
73. if a boiler evaporates 50,000 lbs. of steam/hour and is evaporating 10 pounds of steam/sq. ft. of heating surface, the heating surface of the boiler is ____sq. ft. - Correct answer 5000
74. oxygen in feed water causes ______ - Correct answer pitting
75. it is permissible to have one blow down valve on a boiler operated under______ psi - Correct answer 100
76. at atmospheric pressure, water boils and turns to steam at _____ °f - Correct answer 212
77. a steam pressure gauge is protected against excessive temperature by a ______
    • Correct answer siphon

94. two bottom blow down valves are required on boilers operating at pressures above______ psi - Correct answer 100
95. extra heavy steel pipe is required on a boiler bottom blow down line when the pressure is above ____ psi - Correct answer 125
96. package boilers are programmed to _____ - Correct answer ignite the burner in low fire
97. there are________ sq. ft. of heating surface in a water tube 3 1/2" in diameter and 20' long - Correct answer 18.
98. to change 1 lb. of water from and at212 °f into steam at atmospheric pressure,______ but are necessary - Correct answer 970.
99. a surface condenser is one that______ - Correct answer has circulating water flowing through the tubes and exhaust steam around the outside of the tubes
100. A boiler is rated at 30,000 lb. /hr. and has a 5% blow down loss. The minimum size feed water pump to supply this boiler is ________ gal./hr. - Correct answer 3795
101. three types of draft used in power plants are______ - Correct answer natural, forest, and induced
102. in a water tube boiler, heat and gases of combustion pass______ - Correct answer around the tubes
103. when the burner is in high fire, the______ - Correct answer air-fuel ratio is at maximum rate
104. a boiler with a draft gauge showing a positive pressure indicates_____ - Correct answer furnace pressure is above atmospheric pressure
105. down comer tubes are found _____ - Correct answer in a water tube boiler
106. a boiler connected in battery requires a free blowing drain between the two stop valves when the ______ - Correct answer boiler has a manhole opening
107. most furnace explosions are caused by _____ - Correct answer failure to purge the furnace at startup
108. baffles in the boiler are designed to direct gases of combustion for close contact with the ________ - Correct answer boiler heating surface

109. the over speed tripping device on a steam turbine must be tripped when____ - Correct answer shutting down the steam turbine
110. one gallon of no. 6 fuel oil weighs approximately _______ lb. - Correct answer 8.
111. three types of boiler feed water pumps are _____ - Correct answer reciprocating, centrifugal, and turbine
112. the most important fitting on a boiler is the______ - Correct answer safety valve
113. viscosity of fuel oil is a________ - Correct answer measure of internal resistance to flow
114. boiler water treatment is required to____ - Correct answer prevent scale formation on eating surfaces
115. the safety valve______ - Correct answer prevents the boiler from exceeding its map
116. try cocks I used to________ - Correct answer as a secondary means to determine water level
117. a glass is used to ______ - Correct answer indicate the water level in the boiler
118. before using soap blowers, it is necessary to______ - Correct answer open the steam line on the soot blower
119. safety valve repair should be done by the________ - Correct answer safety valve manufacturer or an authorized representative
120. steam at a temperature of 350 degrees Fahrenheit and a pressure of 50 psi is______ - Correct answer superheated
121. a duplex double-acting reciprocating feed water pump has____ - Correct answer to steam Pistons 2 to 2 2/2 times larger in area than the water piston
122. an accumulation test is used to determine_______ - Correct answer safety valve capacity
123. A water tube boiler has 250 tubes that are 20 ft. long and 3" in diameter. if the boiler produces one BHP for every 10 sq. ft. of heating surface, the maximum BHP it will produce is________ BHP - Correct answer 392

139. a water column______ - Correct answer reduces fluctuations of water in the gauge glass
140. the low water fuel cutoff can be tested by _____ - Correct answer allowing the water level to drop
141. boilers that are equipped with air heaters and economizers usually have_____ draft fans - Correct answer forced and induced
142. baffles are used in the Steam and water drum of water tube boilers to _____ - Correct answer prevent water carry over with the steam
143. a closed feed water heater is always installed_______ - Correct answer on the discharge side of the feed water pump
144. the purpose of a burner pressure control is to _____ - Correct answer start and stop the burner firing cycle
145. a gas pressure regulator is used to control the ______ - Correct answer gas pressure at the burner
146. if the chimney temperature is 250 degrees Fahrenheit higher than the Steam and water temperature, the boiler is _______ - Correct answer not operating efficiently
147. the most controllable heat loss in a boiler is from the loss of heat in______

- Correct answer gases of combustion 

148. on the feed water line, the valve closest to the boiler shell is a _____ valve

- Correct answer stop 

149. four basic systems found on boilers are ______< - Correct answer steam, feed water, fuel, and draft
150. if a low-water condition occurs, the operator should first _______ - Correct answer secure the burners
151. A pressure control on a boiler is used to. _______ - Correct answer control the operating range of the boiler
152. sup blowers are most commonly found ______ - Correct answer on water tube boilers

153. a duplex reciprocating feed water pump operates on the principle that the _______ - Correct answer steam piston area must be 2 to 2 1/2 times larger than the water piston
154. When testing the safety valve by hand, it is the accepted practice to have. _________ - Correct answer at least 75% popping pressure before testing
155. Oxygen in a boiler drum causes. ________ - Correct answer pitting
156. __________ steam turbines allow condensate to be reclaimed for use in the system - Correct answer condensing
157. with water at a temperature of 212°f, 1 bop is equivalent to the evaporation of 34.5 lb. of water every ________ hour(s) - Correct answer 1
158. in a closed feed water heater, the _________ - Correct answer Steam and water do not mix
159. sensible heat is heat that ______ - Correct answer changes the temperature of a substance but not its state
160. When performing a hydrostatic test on a boiler, the safety valve must be. ________ - Correct answer removed from the boiler and the opening blank or gagged
161. If repairs are to be made on a safety valve, they must be made by the. _______/ - Correct answer manufacturer of the safety valve or authorized representative
162. the proper way to stop a steam turbine when taking it off line is to _______

- Correct answer trip the over speed device by hand 

163. Approximately. _______^ of air is required to completely burn 1 lb. of fuel oil - Correct answer 15 lb.
164. In order to reduce the viscosity of a fuel oil, it's. _______ - Correct answer temperature must be increased
165. what are is prevented from backing up into the steam line on a desecrator ________ - Correct answer an internal overflow or a loop seal
166. A steam pressure gauge must have a range of at least. _______ - Correct answer 1 1/2 times the map
167. electrostatic precipitators are used in the power plants to ________ - Correct answer remove fly ash from gases of combustion

183. Circulating water passes through a surface condenser. ________ - Correct answer inside the tubes
184. The Pour point of a fuel oil is. ________ - Correct answer the lowest temperature at which oil will flow
185. A condensate pump is located 75 ' below the feed water heater and its discharged gauge reads 75 PSI. The pressure at the inlet to the heater is. _______ psi - Correct answer 42.
186. A boiler burning fuel oil and using forced-draft requires. ________ cu ft. a furnace volume per boiler horsepower - Correct answer.
187. A boiler evaporates 48,000 lb. of steam/hr. it evaporates 12 lb. of steam/sq. ft. of heating surface per hour. The boiler has _______ as ft. of heating surface - Correct answer 4000
188. a steam turbine exhaust end and condenser are prevented from excess pressure by ________ - Correct answer the atmospheric relief valve
189. at 0 psi, _______ but are necessary to change 1 lb. of water from and at 212°f into steam - Correct answer 970.
190. automatic toilets are program to ignite the burner ______ - Correct answer in low fire
191. ________ boilers can operate at higher pressures than fire tube boilers - Correct answer water tube
192. the first step when using a soot blower is ________ - Correct answer open Steam line drain
193. the purpose of a vent on an open feed water heater is to _______ - Correct answer remove air and other non-condensable gases
194. cooling water and steam are in in direct contact with each other in a(n) ________ condenser - Correct answer surface
195. a boiler with 3450 sq. ft. of heating surface design for 5 sq. ft. of heating surface / BHP has ________ hip - Correct answer 690
196. a water column _________ - Correct answer dampens fluctuating water level

197. A closed feed water heater is always installed. ________ - Correct answer on the discharge side of the feed water pump
198. _________ is required for combustion - Correct answer atomization of fuel, oxygen, and Heat
199. heating value of natural gas is expressed in _______ - Correct answer terms
     • Correct answer
200. spelling in a boiler occurs in the_______ - Correct answer combustion chamber
201. economizers are used in Plants to _____ - Correct answer heat feed water using gases of combustion
202. fuel oil with a high viscosity_______ - Correct answer it's hard to pump
203. boiler water is chemically treated to _____ - Correct answer prevent scale from forming on the boiler heating surfaces
204. steam pressure gauges are calibrated in _____ - Correct answer pounds per square inch
205. feed water temperature raised 10 degrees Fahrenheit from exhaustion or heat from gases of combustion result in an increase of ________% in plant efficiency - Correct answer 1
206. the evaporation of 34.5 lb. of water from and at 212°f is a standard for ______ - Correct answer 1 bop
207. the tubes in a water tube boiler are fastened by ______ - Correct answer rolling and expanding in drums and headers
208. a dry pipe separator in a boiler _______ - Correct answer maintains a high-quality Steam
209. a (n) ________ valve offers the least resistance to flow - Correct answer gate
210. if valves are installed between the boiler and water column, they must be _______ - Correct answer soy or lever-type, locked or chained open
211. steam withdrawn from a steam turbine under pressure control is __________ Steam - Correct answer extraction

227. in a steam generating plant, the economizer is used to _______ - Correct answer heat feed water
228. when testing a safety valve by hand, the pressure on the boiler should be at least ___________% are the safety valve set pressure - Correct answer 75
229. heat absorbed by water when changing from liquid to steam at the boiling point is ______ - Correct answer latent heat
230. to raise the temperature of 1 lb. of water from 32°f to 212°f, ________ but are needed - Correct answer 180
231. baffles are placed between the tubes of a boiler to _________ - Correct answer direct the travel of gases of combustion
232. In a pressure atomizing fuel oil burner, atomization of fuel oil is produced by the. _________ - Correct answer burner tip and high fuel oil pressure
233. The steam Inlet connections of a condenser should be provided with. _______ - Correct answer an atmospheric relief valve
234. when a hydrostatic test is performed on a boiler, each safety valve should be _____ - Correct answer blanked or gagged
235. in a surface condenser, the cooling water _______ - Correct answer passes through the tubes
236. a bypass damper on an air heater _______ - Correct answer prevent moisture from collecting at low firing rates
237. The minimum size manhole is. ______ - Correct answer 11" x 15"
238. The diameter of a chimney may have to be increased. ___________ - Correct answer if the boiler smokes continually
239. stay bolts are generally used on ______ - Correct answer fire tube boilers
240. before draining a boiler, _______ - Correct answer allow the setting to cool
241. Cast iron water columns maybe use for pressures up to ______ psi. - Correct answer 250
242. all high pressure boilers must have more than one method to determine water level : engaged glass and _______ - Correct answer try cocks

243. if dry saturated steam at 200 PSI is passing through a reducing valve and is reduced to 25 psi, it is ________ - Correct answer superheated
244. Three boilers are connected to a common header and each boiler is carrying 100 PSI. The pressure gauge on the header reads. ______ psi - Correct answer 100
245. _______ is caused by allowing sudden extreme changes of temperature in a furnace - Correct answer spelling
246. _________ is always necessary in the combustion process - Correct answer oxygen
247. water walls should be blown down ______ - Correct answer when the furnace is cool
248. an automatic non-return valve is used with a(n) _________^ - Correct answer boiler
249. feed water is treated chemically before it enters the boiler drum to ________ - Correct answer change scale forming salts to a non-adhering sludge