MN Boiler License 258 Questions with 100% Correct Answers., Exams of High Pressure Vessels and Boilers

Download MN Boiler License 258 Questions with 100% Correct Answers. and more Exams High Pressure Vessels and Boilers in PDF only on Docsity! 1.MN Boiler License 258 Questions with 100% Correct Answers. 2. What are the conditions necessary for good combustion? a) Low sulfur content b) Thermal, thermocouple, tubular c) Turbulence, temperature, time 3T's - Correct Answer c) turbulence, temperature, time 3T's 3. Why secondary air is necessary in hand fired boilers? a) Necessary to burn the combustible gases b) If primary air should fail c) Used only if sulfur content is high - Correct Answer a) Necessary to burn the combustible gases 4. When pressure increases on steam from a given amount of water what happens to its volume and latent heat? a) Increases b) Decreases c) Remains the same - Correct Answer b) decreases 5. When pressure increases on steam from a given amount of water what happens to its temperature? a) Increases b) Decreases C) remains the same - Correct Answer a) increases 6. When carbon monoxide (co) is formed and carbon dioxide (co2) is very high what does it generally signify? a) More "under the fire air" is needed b) Less "under the fire air" is required c) More "over the fire" air is needed d) Less "over the fire" is needed less - Correct Answer c) more "over the fire" air is needed 7. Excess air is an expression that refers to: a) Overabundance of air b) Theoretical amount of air c) Air supplied above that theoretically required - Correct Answer c) air supplied above that theoretically required 8. A good percentage of carbon dioxide when burning oil is: a) 12% b) 8 % c) 10% - Correct Answer a) 12% 9. What is draft on a boiler in operation? a) Flow of gases through boiler b) Difference in pressure between atmosphere and furnace or firebox c) Difference between atmospheric pressure and breeching - Correct Answer b) difference in pressure between atmosphere and furnace or firebox 10.Which has greater heating value per pound? a) Oil b) Coal - Correct Answer a) oil (18000 - 19500 BTU) 11. (Coal has (6900 - 12910 BTU)) 12.Heavy oil must be heated before entering the burner to: a) Increase carbon content b) Decreased sulfur content c) Get proper atomization - Correct Answer c) get proper atomization 13.Why should a daily log be kept of flue gas temperature? a) Valuable information in case of explosion b) Superintendent files them c) Change an operation, causing heat loss, can be detected - Correct Answer c) change an operation, causing heat loss, can be detected 14.Find SWP of a boiler 72 inches in diameter, thickness of one-half inch, tensile strength of 55,000 pounds, quadruple riveted butt and strap joint (.94) factor of safety 5: a) 14.3 b) 143.6 c) 1436 - Correct Answer b) 143.6 15.The total heat of steam is 1,188 BTUs, and feed water temperature is 182 degrees Fahrenheit. What is the factor of evaporation? a) 107 b) 10.7 c) 1.07 - Correct Answer c) 1.07 16.Why would viscosity be important in fuel oil? a) More heat is recovered in water b) Has more volatile hydrocarbons c) Affects ease with which it can be handled - Correct Answer c) effects ease with which it can be handled 17.Why is too much air objectionable? a) Cost too high b) Loss of efficiency 36.On a globe valve used on feed piping, the inlet shall be: a) Immaterial b) Above the valve disc c) Under the valve disc - Correct Answer c) under the valve disc 37.Which valve offers very little resistance to a flow? a) Gate b) Globe c) Check - Correct Answer a) gate 38.Which valve is used where a flow in one direction only is desired? a) Gate b) Globe c) Check - Correct Answer c) check 39.Each boiler shall have: a) Only one safety valve b) Two safety valves c) One or more safety valves d) Two or more safety valves - Correct Answer c) one or more safety valves 40.A boiler with more than 500 square feet of heating surface must have: a) One safety valve b) Two or more safety valves c) Three safety valves d) Four safety valves - Correct Answer b) two or more safety valves 41. If a boiler is fired to full capacity, the header valve being closed, the safety valves or valve should prevent steam pressure from rising above: a) 4% above S.W.P. or valve setting b) 5% above S.W.P. or valve setting c) 6% above S.W.P. or valve setting d) 10 % above S.W.P. or valve setting - Correct Answer c) 6% above S.W.P. or valve setting 42.The maximum steaming capacity of a boiler shall be based on the: a) Capacity of the fuel burning equipment, air supply, draft, etc. b) Ability of the fireman c) Type of boiler under test d) Temperature of hot boiler feed water - Correct Answer a) capacity of the fuel burning equipment, air supply, draft, etc. 43.One of mare safety valves on the boiler proper shall be set: a) At or below the maximum allowable working pressure b) Not more than 6% above the maximum allowable working pressure c) Not more than 10% above the maximum allowable working pressure d) Not more than 15% above the maximum allowable working pressure - Correct Answer a) at or below the maximum allowable working pressure 44. If additional valves are used, the highest pressure setting shall not exceed the M.A.W.P. by more than: a) 3% b) 4% c) 5% d) 6% - Correct Answer a) 3% 45.Safety valves shall be: a) Positive weight b) Direct spring loaded type c) Combination of weight and spring d) Doesn’t make any difference - Correct Answer b) direct spring loaded type 46.Dead-weight or weighted-lever safety valves may be used: a) When pressure is less than 100 psi b) Never c) Only by permission of boiler inspector d) Under 15 psi - Correct Answer b) never 47. If it is desirable to prove the computations of the safety valve capacity it may be done in: a) Two ways b) Three ways c) Four ways d) five days - Correct Answer b) three ways 48.When not more than two valves of different sizes are mounted singly. The relieving capacity of the smaller valve shall not be less than _______ percent of the larger valve. a) 20% b) 35% c) 50% d) 70% - Correct Answer c) 50% 49.The safety valve or valves shall be connected to the boiler independent of any steam connection. a) If under 100psi b) Always c) If furnace is stoker fired d) If required by inspector - Correct Answer b) always 50.No valve of any description shall be placed between the required safety valve or valves and the boiler nor on the discharge pipe between the safety valve and the atmosphere. a) If over 15psi b) If over 100psi c) Without written permission from state boiler inspector d) At any time - Correct Answer d) at any time 51. If a discharge pipe is used on the safety valve, the cross sectional area shall be: a) Not less than the full area of the valve outlet b) Two times the full area of the valve outlet c) Three times the full area of the valve outlet d) It doesn't make any difference - Correct Answer a) not less than the full area of the valve outlet 52.Safety valves shall operate without chattering and shall be adjusted to close after blowing down not more than: a) 4% but not less than 2 lbs. psi b) 3% but not less than 4 lbs. psi c) 6% but not less than 4 lbs. psi d) 10% but not less than 2 lbs. psi - Correct Answer a) 4% but not less than 2 lbs. psi 53.The spring in a safety valve in service for pressure up to 250lbs psi shall not be used for any pressure more than _______ below that for which it is designed. a) 2% above or 2% b) 6% above or 6% c) 10% above or 10% d) 12% above or 12% - Correct Answer c) 10% above or 10% 54.For pressure above 250lbs P.S.I., the safety relief shall not have a pressure more than ______ below that that for which it is designed. a) 2% above or 2% b) 5% above or 5% c) 6% above or 6% d) 10% above or 10% - Correct Answer b) 5% above or 5% 55.Every attached super-heater shall have one or more safety relief valves: a) Near the outlet b) Between boiler and super-heater c) Between super-heater and turbine or engine d) If steam is used to operate turbine - Correct Answer a) near the outlet 72.Priming is a condition in which water is: A) Too hot for pump b) Too low for pump to lift c) Suddenly discharged with steam - Correct Answer c) suddenly discharged with steam 73.Phosphate salts are used extensively to: a) Prevent scale deposits b) Reduce oxygen in feed water c) Increased pH - Correct Answer a) prevent scale deposits 74.Boiler feed water is neutral in pH is: a) 8.3 b) 7.0 75.C) 10 to 11 - Correct Answer b) 7.0 76.Sodium sulfate may be used to: a) Diminish caustic embrittlement b) Remove oxygen corrosion c) Charge zeolite softener - Correct Answer b) remove oxygen corrosion 77.Boiler efficiency is found by using which of the following formulas? a) O / I b) I / O c) O * I - Correct Answer a) O / I 78.Output / input 79.Foaming in a boiler is caused by: a) Feed water too cold b) Solids too high c) Low pH - Correct Answer b) solids too high 80.When soot blowers are incorrectly adjusted steam from the blower can: a) Wear the tubes b) Bind the tubes c) Cut the tubes - Correct Answer c) cut the tubes 81.Why must the ends of the fire tubes be flared and beaded? a) Aid in removal in the future b) Aid in the flow of flue gases c) For expansion and contraction d) - Correct Answer b) aid in the flow of flue gases 82. If 80,000 BTUs are absorbed into the water of a boiler and 100,000 BTUs are supplied in the fuel to the fire box what would the efficiency of the boiler be? a) 120 b) 100 c) 80 - Correct Answer c) 80 83.80000 divided by 100000 84.Output / input 85.A compound engine uses the same steam: a) 1x b) 2x c) 3x d) 4x - Correct Answer b) 2x 86.The blow-back Ring should be adjusted so the blow back on a safety valve up to 100 pounds will not be less than: a) 2 pounds b) 4 pounds c) 6 pounds d) 10 pounds - Correct Answer a) 2 pounds 87.Lubricating oil reaches a breakdown point at: a) 80 degrees b) 160 degrees c) 240 degrees d) 320 degrees - Correct Answer b) 160 degrees 88.A bearing is said to be brass bound when: a) It is made of brass b) It is held together with a brass ring c) The Babbitt is all worn out d) Brass bolts are used - Correct Answer c) the Babbitt is all worn out 89. If the valves are used on the water column connections, they must be: a) Check valves b) Blow off type valves c) Valves that can be locked open d) Lever valves - Correct Answer c) valves that can be locked open 90.Valves used for throttling action should be: a) Check valves b) Globe valves c) Butterfly valves d) Gate valves - Correct Answer b) globe valves 91.What is the maximum boiler horsepower you may take charge of on a chief engineer license? a) 100 horsepower b) Unlimited horsepower c) 500 horsepower - Correct Answer b) unlimited horsepower 92.A first-class engineer may take charge of a boiler plant not to exceed: a) 150 horsepower b) 600 horsepower c) 500 horsepower - Correct Answer c) 500 horsepower 93. If you were to fail a Chief Engineers exam, how long must you wait before you would be allowed to take the test again? a) 10 days b) 30 days c) 90 days d) 120 days - Correct Answer b) 30 days 94.Same for all exams 95.Recent change 96.What should be displayed in the boiler room? a) Vacation schedule b) engineer's license, and exemption or inspection certificates c) The manufacturers book of operation on the boiler - Correct Answer b) engineer's license, and exemption or inspection certificates 97.A second-class engineer make a complete charge of a boiler plant not to exceed: a) 10 horsepower b) 100 horsepower c) 500 horsepower d) Unlimited horsepower - Correct Answer b) 100 horsepower 98.When determining which engineers license is needed, the total horsepower connected to the common header is used. a) True b) False - Correct Answer a) true 99. in a boiler plant where there are two 250 horsepower boilers (using heating surface) connected to the same common header, what engineers license would be required to be in charge of the plant? a) Chief engineer b) First class engineer c) Second class engineer d) Special engineers license - Correct Answer b) first class engineer b) Yes c) No, see section 13, 183. 501 - Correct Answer c) no, see section 13, 183. 501 117. What equipment would you be allowed operating responsibility for with a first class engineer's license Grade B? a) Low-pressure boilers and their appurtenances b) Low and high-pressure boilers 118. C total boiler horsepower not to exceed 50 horsepower liquid or vapor boilers and their appurtenances. - Correct Answer c total boiler horsepower not to exceed 50 horsepower liquid or vapor boilers and their appurtenances. 119. Four 20 million BTU input hot water boilers are connected to the same common header. What license would be needed to be in charge of this (temperature of hot water is less than 250 degrees Fahrenheit and pressure is less than 160 PSI) a) Chief A b) Only chief A or B c) Chief A, B or C license - Correct Answer c) Chief A, B or C license 120. The energy rate needed to evaporate 34.5lb of water at 212 °F (100 °C) in one hour. Equal to 33,475 BTU/h. Approximately 9.810657 x 103 121. Over 500hp to unlimited requires chief 122. What class and grade of license must the shift engineer have where a chief engineer has charge of a hot water plant operating be what class and grade of license must the shift engineer have where a chief engineer has charge of a hot water plant operating below 250 degrees Fahrenheit and 160 PSIG total boiler horsepower of 500 bop? a) A 2nd Class Grade A, B or C License b) A 1st Class Grade A, B or C License c) Only a 2st Class A or B - Correct Answer a) A 2nd Class Grade A, B or C License 123. (ASME) stand for what? a) American Standards for Mechanical Electricians b) American Society of Mechanical Engineers c) Allied Sciences and Mechanics Emeritus - Correct Answer b) American Society of Mechanical Engineers 124. Founded in 1880 125. (ASME) developed the 'Boiler and Pressure Vessel Code' which forms the basis for laws in the US and Internationally in what year? a) 1880 b) 1920 c) 1914 - Correct Answer c) 1914 126. "Operating experience" according to MN state statutes includes which of the following? a) Boiler Operation b) Maintenance c) Training d) Observation e) Personal Participation - Correct Answer all a) Boiler Operation b) Maintenance c) Training d) Observation e) Personal Participation 127. A chief class operating license is required to take charge of a boiler plant over what horsepower? a) 50 bop b) 500 bop c) 300 bop - Correct Answer c) 300 bop 128. Must be in attendance 4 hrs. A day for 5 days a week except for sick and vacation time or holidays. 129. Minimum passing grade for MN boiler exams is... percent? a) 60 b) 70 c) 80 - Correct Answer b) 70 130. For purposes of the exam, experience must be obtained within the previous how many years? a) 5 b) 20 c) 10 - Correct Answer c) 10 131. For purposes of the exam a "year of experience" is defined as? a) A twelve month period for low pressure boiler, including off season maintenance. b) 2,000 hrs. Or more c) All of above - Correct Answer c) all of above 132. For purposes of the exam only, a boiler horsepower is defined as? a) 10 sq. ft. of heating surface b) Boiler BTU input / 676,000 c) 10 kW d) All of above - Correct Answer a) 10 sq. ft. of heating surface 133. b) Boiler BTU input / 676,000 134. c) 10 kW 135. d) All of above 136. A high pressure boiler plant of 30 or less bop must be attended (checked) to? A) daily b) 4 hours a day c) Cannot be left unattended over consecutive 2 hrs. - Correct Answer a) daily 137. A high pressure boiler plant of 31 to 200 bop must be attended (checked) to? A) daily b) 4 hours a day c) Cannot be left unattended over consecutive 2 hrs. - Correct Answer c) cannot be left unattended over consecutive 2 hrs. 138. A high pressure boiler plant of over 200 bop must be attended? a) May be left for 15 mines as long as they are within 500ft of boiler room b) May be left for 30 mines as long as they are within 500ft of boiler room c) Cannot approach near continuous absence - Correct Answer b) may be left for 30 mines as long as they are within 500ft of boiler room d) Cannot approach near continuous absence 139. (Cannot leave near 2 hrs. check in briefly and leave again for 2 more. must check equipment for normal operation.) 140. T/F? 141. An automatically fired steam boiler must have a low water cut off that cuts off fuel in case of low water condition. (Over 750,000 Btu) - Correct Answer True 142. T/F? 143. An automatically hot water (or other liquid) boiler does not need a low water cut off that cuts off fuel in case of low water condition. (Over 750,000 144. Btu) - Correct Answer False 145. T/F? 146. In a coil type (fire tube) boiler over 500 sq. ft. must have three or more safety valves. - Correct Answer False 147. In a coil type (fire tube) boiler over 500 sq. ft. must have TWO or more safety valves. 148. T/F? 149. In a high pressure boiler plant over 750,000 177. According to boiler license law enacted in 1982, who is allowed to fill out an affidavit for a person applying for a second class license or higher, boiler license? a) The employer or a second class engineer b) The applicant c) Any licensed engineer in MN - Correct Answer a) the employer or a second class engineer 178. A special engineer shift engineer in no more than a plant of what size? a) 50 bop b) 100 bop c) Unlimited bop - Correct Answer b) 100 bop 179. A first class grade B engineer could take charge of and be responsible for the safe operation and maintenance of boilers of not more than how many bop? a) 200 bop b) 500 bop c) Unlimited bop - Correct Answer b) 500 bop 180. Could a first class grade an engineer be in charge of a low pressure boiler of 400 bop? a) Yes b) No c) If the boiler was approved by the A.S.M.E. - Correct Answer a) yes 181. A hot water boiler is considered to be a high pressure boiler when it: a) Exceeds 250 degrees Fahrenheit, or160 psi b) Exceeds 100 psi c) Exceeds 15 psi d) None of the above - Correct Answer a) exceeds 250 degrees Fahrenheit, or160 psi 182. When operating a hot water boiler, what could cause the safety valve to lift? a) Water too cold for the system b) Expansion tank filled with water c) Not enough pressure - Correct Answer b) expansion tank filled with water 183. What is the purpose of an expansion tank for a hot water boiler? a) To allow for expansion and contraction of water volume at varied temperatures b) It has little value and could be plugged c) The expansion tank will hold the extra water needed for operation d) None of the above - Correct Answer a) to allow for expansion and contraction of water volume at varied temperatures 184. On some hot water boilers, a run around pump is used. What is its purpose? a) To increase circulation and bring the boiler up to temperature faster b) It keep the discharge and return lines at the same pressure c) To increase discharge pressure - Correct Answer a) to increase circulation and bring the boiler up to temperature faster 185. Also makes temperature move even reducing temperature fluctuations 186. What is the purpose of a low limit control on a hot water heater? a) Low limit controls are not used on hot water boilers b) This control will not allow the burner to leave its low fire position until the temperature in the boiler has passed 150 degrees c) A low limit control will decrease the pressure on the system - Correct Answer b) this control will not allow the burner to leave its low fire position until the temperature in the boiler has passed 150 degrees 187. If you passed a state boiler exam for 1st class, grade c engineer, what equipment would your license allow you to operate? a) Total horsepower of 250 psi b) boilers up to 500 hip and hot water boilers not to exceed 250 degrees F or 160 psi steam boilers not to exceed 15 psi c) Hot water boilers above 250 f or 160 psi and steam boilers above 15 pies - Correct Answer b) boilers up to 500 hip and hot water boilers not to exceed 250 degrees F or 160 psi steam boilers not to exceed 15 psi 188. Would a safety relief valve installed on a hot water boiler relieve all the pressure if the boiler was low open water and the water was flashing into steam? a) Yes b) Yes because of the A.S.M.E. code c) No, because such a valve may be sized to handle liquids only. d) If the boiler was approved by the A.S.M.E. - Correct Answer b) yes because of the A.S.M.E. code 189. With a current state of MN Chief Engineer's license (grade C) you would be allowed to operate and take charge of: a) Boilers of unlimited hip not to exceed 250 degrees F or 160 psi hot water and 15 psi steam b) Boilers of unlimited hip and above 250 degrees F or 160 psi hot water and at 15psi steam pressure. c) Boilers of unlimited hip above 15 psi, but below 250 degrees F or 160 psi hot water. - Correct Answer a) boilers of unlimited hip not to exceed 250 degrees F or 160 psi hot water and 15 psi steam 190. What firing control will prevent thermal shock to a hot water boiler? a) A low limit control b) An operating control c) A high limit control d) None of the above - Correct Answer a) a low limit control 191. Can high temperature high pressure hot water be converted to low pressure steam? a) Yes, by using a larger pipe b) No, it cannot be done. c) Yes, with the use of a heat exchanger - Correct Answer c) yes, with the use of a heat exchanger 192. Comparing hot water boilers to steam boilers, what auxiliaries are eliminated? a) Steam traps, condensate tanks, D.A. tanks b) Both systems need the same auxiliaries c) Strainers and reciprocating pumps - Correct Answer a) steam traps, condensate tanks, D.A. tanks 193. In addition to A.S.M.E. safety valve, what other safety device should be installed on hot water boilers? a) A low water fuel cut off b) Steam safety valves c) Purge valve - Correct Answer a) a low water fuel cut off 194. Can low water occur in a hot water boiler? a) No, because the boiler is filled with water b) Yes, for numerous reasons c) Only if the water is too hot - Correct Answer b) yes, for numerous reasons 195. A second class engineer grade C could operate as a shift engineer in a low pressure steam or hot water plant of not more than? a) 100 hip b) 500 hip c) Unlimited HP - Correct Answer b) 500 hip 196. What kind of valve should be used for high pressure, high temperature, and hot water boilers? a) Any kind of low pressure valves can be used b) Brass or bronze valves c) Valve seats. Plugs, and bodies should be made of only cast steel, forged steel or steel alloys - Correct Answer c) valve seats. Plugs, and bodies should be made of only cast steel, forged steel or steel alloys 197. What is meant by the term low pressure boiler? c) Special boiler only - Correct Answer a) hot water boiler 211. The purpose of an expansion tank is to? a) Let steam into the system 212. B) Provide for expansion and contraction of the water volume as the temperature varies 213. c) Allow for the expansion of steam - Correct Answer b) provide for expansion and contraction of the water volume as the temperature varies 214. On a hot water boiler, what is the purpose of the vent valve? a) To make sure there is water in the boiler and to vent out any trapped air b) To provide water for washing the floor c) To vent out dirty water - Correct Answer a) to make sure there is water in the boiler and to vent out any trapped air 215. If the safety valve or ASME safety relief valve leaks, you would? a) Reduce the pressure b) Have the valve repaired or replaced c) Tighten the spring on the valve d) Leave it alone because a small leak is ok - Correct Answer b) have the valve repaired or replaced 216. Tricks or gauge cocks are used on a steam boiler to indicate? a) The true water level inside the boiler b) To let steam into the boiler room c) To vent out the boiler only - Correct Answer a) the true water level inside the boiler 217. On a steam or hot water boiler, the safety valve or safety relief valve could be tested by? a) Hitting them with hammers b) By lifting the lever on the valve or raising the pressure until they operate c) Increase the temperature until they operate - Correct Answer b) by lifting the lever on the valve or raising the pressure until they operate 218. Before starting a steam or hot water boiler you should check for? a) Water in the boiler b) Proper operation of all valves c) The pressure gauges - Correct Answer a) water in the boiler 219. Bottom blow down valves are provided for both Steam and hot water? a) True b) False c) Sometimes - Correct Answer a) true 220. Safety valves or safety relief valves should be manually tested at least? a) True b) False c) Sometimes - Correct Answer... 221. The low water cut out is one of the most important electrical / Mechanical devices on your boiler. How often should it be tested? A) hourly b) Weekly 222. C) Yearly 223. d) Daily - Correct Answer d) daily 224. What device must be located between a hot water boiler and the expansion tank? a) A shut-off valve, so the expansion tank can be isolated and drained during the operation of the boiler b) 2 temperature controls c) A low fire limit control - Correct Answer a) a shut-off valve, so the expansion tank can be isolated and drained during the operation of the boiler 225. On a hot water boiler, every time the burner operates the safety relief valve opens. Why? a) Too high of a temperature b) The expansion tank is waterlogged or the isolating valve for the expansion tank is closed c) The burner needs adjustment - Correct Answer b) the expansion tank is waterlogged or the isolating valve for the expansion tank is closed 226. An aqua stat is used on a? A) hot water boiler b) Steam boiler only c) Both types of boilers - Correct Answer a) hot water boiler 227. An aqua stat is a device used in hydroid heating systems for controlling water temperature. To prevent the boiler from firing too often, aqua stats have a high limit temperature and a low limit 228. To reduce thermal shock on hot water boilers, what devices are used? a) A hot water heater, an electric heater, or an air preheater b) 1 low limit or low fire hold control, 2 a three-way valve, 3 a run around pump c) none of the answers given above - Correct Answer b) 1 low limit or low fire hold control, 2 a three-way valve, 3 a run around pump 229. On a steam boiler, the control named the operator will? a) On pressure decrease; start: on pressure increase, stop; b) On pressure decrease; stop: on pressure increase, start; c) None of the above - Correct Answer a) on pressure decrease; start: on pressure increase, stop; 230. On a hot water boiler, the control called the operator will? a) On temperature increase, start; on temperature decrease, stop b) On temperature increase, stop; on temperature decrease, start c) None of the above - Correct Answer b) on temperature increase, stop; on temperature decrease, start 231. On a steam boiler, what is the siphon or pigtail used for? a) To let steam leaves the boiler b) To drain water from the boiler c) To protect the steam gauge from too high of a temperature - Correct Answer c) to protect the steam gauge from too high of a temperature 232. What is one reason causing the expansion tank to fill with water? a) Too high of pressure b) Air leaks out by the gauge glass fittings c) Too high of a temperature - Correct Answer b) air leaks out by the gauge glass fittings 233. What would you do if you came into the boiler room and found no water in the boiler, regardless if it's a steam or hot water boiler? a) Add water to the boiler b) Lift the safety valve on the boiler 234. C shut off the burner and allow the boiler to cool - Correct Answer c shut off the burner and allow the boiler to cool 235. Referring to the previous question, the most dangerous action a boiler operator can take when a dangerously low water condition exists is? a) Add water to the boiler b) Increase the pressure on the boiler c) Shut down the boiler - Correct Answer a) add water to the boiler 236. What is the purpose of the bottom blow down on a steam boiler? a) To check the steam gauge b) To remove sludge and sentiment and to drain the boiler c) None of the answers given - Correct Answer b) to remove sludge and sentiment and to drain the boiler 237. On a closed system, why must there be a drain line on the expansion or compression tank? a) So that any extra air can be evacuated from the system d) All of the answers mentioned - Correct Answer c) the output of the pump in gallons per minute 259. Will static head in a hot water system reduce the output of the recirculating pump in gallons per minute? a) It depends on the temperature of the water b) Yes 260. C) no 261. d) None of the answers given - Correct Answer b) yes 262. Name one way an expansion tank can become waterlogged? a) Air could escape past the upper gauge glass fitting b) Too much pressure in the system c) Not enough pressure in the system d) None of the answers given - Correct Answer a) air could escape past the upper gauge glass fitting 263. A device that controls the stopping and starting of the burner on a hot water boiler is a/n? a) Pressure troll b) aqua-stat c) Low water cut out d) Sail switch - Correct Answer b) aqua-stat 264. If the expansion or compression tank becomes waterlogged and the burner starts what may happen? a) Nothing b) Boiler will explode c) Safety relief valve may lift d) The pressure in the system will decrease - Correct Answer c) safety relief valve may lift 265. When comparing a hot water boiler to a steam boiler, what auxiliaries are eliminated? a) Steam traps, condensate tanks, and pumps b) Both systems need the same auxiliaries c) Strainers in recirculating pumps d) Aqua stats and recirculating pumps - Correct Answer a) steam traps, condensate tanks, and pumps 266. After a hot water boiler has been drained, cleaned, and refilled with water, what must be done? a) Reset aqua stats b) Blow down c) Evacuation of air from the system d) Reset the sail switch - Correct Answer c) evacuation of air from the system 267. In addition to a safety relief valve, what other safety devices should be installed on a hot water boiler? a) A safety purge valve b) A low water cut out control c) Pressure troll d) All of the answers given - Correct Answer b) a low water cut out control 268. Can a hot water boiler have a low water condition? a) Yes, for numerous reasons b) No, because the system is filled with water c) Not enough information for an answer d) None of the answers given - Correct Answer a) yes, for numerous reasons 269. When first coming on duty, the boiler operator should? a) Blow down the boiler b) Check for water in the pipelines c) Check for water in the boiler d) Look at the fire in the boiler - Correct Answer c) check for water in the boiler 270. On a steam boiler, the boiler operator will use the and the to find the true water level in the boiler? a) Low water cut off b) Pressure troll c) Gauge cocks and tri cocks d) None of the answers given - Correct Answer c) gauge cocks and tri cocks 271. When blowing down the water column or gauge glass, the water in the glass should blank return to normal when the valves are closed? a) Slowly b) Quickly c) Does not make any difference d) None of the above answers - Correct Answer b) quickly 272. If the water in the boiler is below the bottom tri cock can water be safely added to the boiler? A) no b) Only if the pressure is above 15 PSIG c) Yes if water flows continuously from the gauge glass drain line d) None of the answers given - Correct Answer c) yes if water flows continuously from the gauge glass drain line 273. The most dangerous action the boiler operator can take when water cannot be found in the boiler is to what? a) Increase the pressure on the boiler b) Add water to the boiler c) Shut off the burner d) Change fuels - Correct Answer b) add water to the boiler 274. All low water cut-offs should be taken apart and cleaned and inspected how often? A) yearly b) Every five years c) Every three years d) Never - Correct Answer a) yearly 275. If a magnetron low water cut off hangs up, the boiler operator should? a) Take apart the low water cut out and check the enclosing tube to see if the steel rod is sticking inside it. b) Replace the magnets c) Replace the floats d) Replace the switches - Correct Answer a) take apart the low water cut out and check the enclosing tube to see if the steel rod is sticking inside it. 276. If a float type of low water cutoff hangs up, the boiler operator should? a) Replace the float b) Replace the Mercury switch c) Check the float chamber for mud or sediment d) Adjust the float - Correct Answer c) check the float chamber for mud or sediment 277. If an electrode type of low water cut off does not work you should? a) Increase the voltage b) Check the electrodes for bridging c) Replace the electrodes d) Replace the entire unit - Correct Answer b) check the electrodes for bridging 278. A skilled boiler operator can use a pressure gauge to indicate a waterlogged expansion tank? A) no b) Only if the boiler is up to pressure c) Yes d) None of these answers - Correct Answer c) yes 279. How? 312. Name two types of boilers that use stay bolts? A) locomotive and boats b) HRT and scotch boilers c) Fire tube and water tube - Correct Answer b) HRT and scotch boilers 313. T /F in a CLOSED feed water system, steam condenses and becomes part of the feed water. 314. T) 315. F) - Correct Answer F 316. In a closed feed water system, the condensate does not mix with the feed water 317. Heat is transferred by three means. What are they? a) Touch, direct heat, and across space b) Conduction, radiation, convection c) Light, infrared, direct heat - Correct Answer b) conduction, radiation, convection 318. Conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass 319. What is "sensible" heat? A) heat you can feel b) Heat that shows on a thermometer (measurable) c) Common sense heat 320. D) a) and b) - Correct Answer d) a) and b) A) heat you can feel b) Heat that shows on a thermometer 321. What is "latent" heat? a) Heat that is waiting to be released b) Heat of a state i.e. liquid or gas c) Can be measured with a thermometer - Correct Answer b) Heat of a state i.e. liquid or gas 322. The difference in latent heat for water to steam is 970BTU's for 1lb water 323. What is "total" heat? a) All the heat in something b) "Sensible" plus "latent" heat c) Heat that shows on a thermometer (measurable) - Correct Answer b) "sensible" plus "latent" heat 324. List 5 ways to determine boiler horsepower. a) BTU (1bhp = 33,475BTU/hr.) b) sq. ft. heating surface (1bhp = 10sq ft.) c) Evaporation of water (1bhp = 34.5lbs/water/hr@212deg f) d) ft. lbs. (1bhp = 33,000 ft. lbs. / minute) e) Kw (1bhp = 10 kW/ hr.) - Correct Answer a) BTU (1bhp = 33,475BTU/hr.) 325. b) sq. ft. heating surface (1bhp = 10sq ft.) 326. c) Evaporation of water (1bhp = 34.5lbs/water/hr@212deg f) 327. d) ft. lbs. (1bhp = 33,000 ft. lbs. / minute) f) Kw (1bhp = 10 kW/ hr.) 328. Two safety valves are required on boilers over how many sq. ft. of heating surface? a) 10 sq. ft. b) 100 sq. ft. c) 500 sq. ft. - Correct Answer c) 500 sq. ft. 329. On a low-pressure boiler, what is the MAWP? a) 10 psi b) 15psi c) 100 psi - Correct Answer b) 15psi 330. If the safety valve(s) on a boiler were set at 12 psi, what is the maximum psi allowed? (Before the safety valve opened) a) 11 psi b) 13 psi c) 15 psi - Correct Answer b) 13 psi 331. (Before the safety valve opened) or (max pressure the boiler could reach)? 332. Who can service safety valves? a) Licensed boiler operator b) Chief boiler inspector or his representative c) Anyone qualified or trained like a company rep - Correct Answer c) anyone qualified or trained like a company rep 333. Which of the following are correct conversions of temperature? a) F = 9/5 c +32 dig = C b) C x 1.8 +32 dig = F c) C = 5/9 (F-32 dig) = F d) F -32 dig x 5/9 =C 334. E) F -32 dig / 1.8 =C g) C x 9/5 +32 dig =F - Correct Answer all are correct 335. What is the purpose of the 'R' stamp? A) Signifies qualified repair/modification facility B) Indicates repaired boiler b) Remodeled boiler stamp - Correct Answer a) Signifies qualified repair/modification facility 336. What is meant by "pitch of rivets"? a) The center-to-center distance of adjacent rivets b) The distance between the centers of two rivets in the outer row of rivets is called the pitch of the rivets in boilers c) Space between two rivets in the boiler - Correct Answer b) the distance between the centers of two rivets in the outer row of rivets is called the pitch of the rivets in boilers 337. What does the ASME code stand for and what does it do? a) ASME stands for Associated Social Mechanics and Engineers b) ASME stands for American Society of Mechanical Engineers, enforces Boiler and pressure vessel construction and maintenance c) ASME stands for American Society of Mechanical Engineers and gives codes for boiler and pressure vessel construction/maintenance - Correct Answer c) ASME stands for American Society of Mechanical Engineers and gives codes for boiler and pressure vessel construction/maintenance 338. Who is NBBI and what do they do? a) The National Board of Boiler and Pressure Vessel Inspectors, enforces ASME laws, rules, and regulations relating to boilers and pressure vessels b) The National Board of Boiler and Pressure Vessel Inspectors oversees adherence to ASME laws, rules, and regulations relating to boilers and pressure vessels c) The National Board of Boiler and Pressure Vessel Inspectors, creates ASME laws, rules, and regulations relating to boilers and pressure vessels - Correct Answer b) The National Board of Boiler and Pressure Vessel Inspectors was created in 1919 to promote greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of pressure equipment of ASME ; oversees adherence to laws, rules, and regulations relating to boilers and pressure vessels. 339. What does "simmering" mean in relation to boilers? a) When a boiler is almost at boiling, but not at a full boil yet b) Leaking valve on a boiler c) Slight leaking due to improper seating of the Safety-valve disk - Correct Answer c) Slight leaking due to improper seating of the Safety- valve disk 340. What is a "huddling chamber" on a safety valve? a) A safety valve has a huddling chamber, located between the valve seat and atmosphere which confines steam, thus increasing upward load, lifting the spring higher and providing a closing snap.