Q621 - Steam Plants, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. Waterboxes on condensers are vented to __________.Not learned 2. Under normal conditions, the rate of heat transfer in a feedwater heater is most greatly affected by the __________.Not learned 3. The main feed check valve functions to __________.Not learned 4. Which of the following is the advantage of operating a typical closed feedwater system for a marine boiler when compared to an open feedwater system?Not learned 5. In the boiler steam and water system, pressure is highest in the __________.Not learned 6. As steam accomplishes work in an engine or turbine, the pressure of the steam is reduced because it __________.Not learned 7. Why is superheated steam used in the main propulsion turbines instead of saturated steam?Not learned 8. Which type of energy conversion is associated with an operating steam boiler?Not learned 9. The best conductor of heat in a marine boiler is __________.Not learned 10. The correct method of expanding a generating tube at the boiler drum tube sheet is to roll __________.Not learned 11. A hole should be made in the sagged tube occurring in a water-tube boiler, prior to plugging the tube to prevent a __________.Not learned 12. The MOST common cause of heat blisters developing on boiler generating tubes is due to __________.Not learned 13. A corbel is used in a boiler furnace to __________.Not learned 14. The useful life of furnace refractory is affected most by __________.Not learned 15. Boiler refractory previously baked out and fired is most sensitive to __________.Not learned 16. When drying and baking are impractical, or time is not available, which of the listed materials could be used to repair both burner openings and gas baffles?Not learned 17. To make temporary emergency repairs to brickwork in a boiler furnace, which of the materials listed should be used?Not learned 18. Radial cracks have developed in the castable refractory of the burner cones after the first firing since the installation of new furnace front refractory. This is an indication of __________.Not learned 19. The purpose of the boiler drum air cock is to __________.Not learned 20. Which of the following is the best reason for opening the air cock when draining a water-tube boiler?Not learned 21. A boiler safety valve must be capable of __________.Not learned 22. Which of the precautions listed should be taken when gagging a boiler safety valve?Not learned 23. While your vessel is underway at normal speed, a steam drum safety valve develops a significant leak. Your first corrective action should be to __________.Not learned 24. A variable capacity, pressure atomizing, fuel oil burner functions to __________.Not learned 25. Before using a boiler compressed air soot blower system, you should __________.Not learned 26. Bi-color water level indicators, connected directly to the boiler drum, operate on the principle of __________.Not learned 27. You are standing watch in the engine room of a steam vessel. You should blow down a gauge glass periodically to __________.Not learned 28. In the event of a failure of the pneumatic control system, a multi-element feedwater regulator is designed to operate as a _________.Not learned 29. Which color burner flame would indicate too much excess air?Not learned 30. In a boiler furnace, incomplete combustion due to insufficient air yields an excess amount of __________.Not learned 31. A higher than normal stack gas temperature could indicate __________.Not learned 32. As the percentage of CO2 in the stack gas decreases, you can assume that __________.Not learned 33. The BTU value of fuel oil is determined by a/an __________.Not learned 34. Which of the significant combustible elements of fuel oil is a major source of boiler corrosion?Not learned 35. The flash point of a residual fuel oil should be used to determine the highest temperature to which the oil may be heated __________.Not learned 36. Why should the fuel oil be recirculated before lighting off a cold boiler?Not learned 37. In the prevention of moisture carryover from a marine boiler, one important consideration is to __________.Not learned 38. Oil accumulation in boiler water would __________.Not learned 39. Testing boiler water for chloride content will indicate the amount of __________.Not learned 40. Normally a boiler water sample should be taken __________.Not learned 41. The most troublesome corrosive substances in boiler water are oxygen and __________.Not learned 42. Treatment of boiler feedwater for the control of hardness is necessary to prevent __________.Not learned 43. An adequate phosphate reserve should be maintained in boiler water to __________.Not learned 44. The bottom blow valve on a water-tube boiler is usually attached to the __________.Not learned 45. When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?Not learned 46. Which procedure should be followed to dry out the fireside of a boiler after water washing?Not learned 47. When cleaning the inside surfaces of the boiler tubes of a water-tube boiler with a powered rotary brush, the brush should be kept in motion to __________.Not learned 48. Boiler tube failures can result from __________.Not learned 49. If while filling the boiler a newly installed gasket on a water-tube hand-hole plate weeps, you should __________.Not learned 50. Which of the following statements about boilers is correct?Not learned 51. When raising steam on a cold boiler under normal conditions, you should always __________.Not learned 52. The time taken to raise steam on a cold boiler should always be __________.Not learned 53. Which of the following precautions should be taken prior to lighting off a boiler?Not learned 54. When increasing the firing rate of a boiler, which of the following should be carried out FIRST?Not learned 55. Water in the fuel supply to a steaming boiler can be detected by __________.Not learned 56. In a boiler equipped with an automatic feed water regulator, erratic variations in the steam drum water level could be caused by __________.Not learned 57. Which of the following types of bearing lubrication schemes can carry the highest unit loading?Not learned 58. Babbitt is a metal alloy commonly used for lining __________.Not learned 59. Main steam turbine bearings are lined with __________.Not learned 60. Which of the journal bearings listed most easily accommodates the minor turbine shaft misalignment?Not learned 61. The splits located in the halves of main reduction gear bearings are aligned at an angle to the horizontal in order to resist __________.Not learned 62. A Kingsbury, or pivot shoe type thrust bearing, can bear much greater loads per square inch of working surface than can parallel surface bearings because provisions are made in the Kingsbury bearing __________.Not learned 63. Large temperature and pressure drops which occur in the first stage of a combination impulse and reaction turbine are caused by steam passing through __________.Not learned 64. Design characteristics of a velocity-compounded impulse turbine include the utilization of __________.Not learned 65. A pressure-velocity compounded impulse turbine consists of __________.Not learned 66. A turbine assembly in which steam flows in series through a high-pressure turbine and then on to a low- pressure turbine, with both turbines driving a common reduction gear through separate shafts, is classified as _________.Not learned 67. Most auxiliary turbine feed pumps do not require an external source of gland sealing steam because they __________.Not learned 68. Turbine casing flanges are sometimes provided with a system of joint grooving to __________.Not learned 69. Labyrinth seals used to reduce leakage around a turbine shaft are constructed of __________.Not learned 70. Because of the pressure drop existing across each diaphragm, the flow of steam between the nozzle diaphragm and the rotor of the turbine is held to a minimum by __________.Not learned 71. The correct radial clearances between the rotor and the casing in a propulsion turbine are maintained by the turbine __________.Not learned 72. Allowance for axial expansion of the steam turbine due to temperature changes is provided for by the use of __________.Not learned 73. Which type of packing is primarily utilized to control steam leakage from the casing of a modern auxiliary turbine?Not learned 74. On main turbine propulsion units, gear-type flexible couplings are generally used between the __________.Not learned 75. During high-speed operation of the main turbine propulsion unit, the heat absorbed by the lubricating oil is removed by the __________.Not learned 76. The lube oil coolers installed in a gravity lubricating oil system are located between the __________.Not learned 77. What type of strainer is used in a turbine lube oil system to remove metallic particles?Not learned 78. When the temperature of the main turbine lubricating oil is lowered, an increase will occur in the __________.Not learned 79. The gravity tank in a gravity lube oil system serves to __________.Not learned 80. In a pressure type main propulsion turbine lubrication system, the lube oil service pumps normally take suction from the main sump and discharge directly to the __________.Not learned 81. Which of the filters listed will deplete the additives in lubricating oil?Not learned 82. Lube oil is preheated before centrifuging in order to __________.Not learned 83. If contaminated lube oil were allowed to settle undisturbed in a tank, into which layers would the contaminants separate?Not learned 84. Of the many impurities commonly found in marine lubricating oil, which of the following CANNOT be removed by a centrifugal purifier at normal operating speeds and temperatures?Not learned 85. The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by __________.Not learned 86. The intake and exhaust valves used in a diesel engine are returned to their seats by __________.Not learned 87. In a four-stroke cycle diesel engine, badly worn intake valve guides can cause excessive __________.Not learned 88. In diesel engines, hydraulic valve lifters are used to __________.Not learned 89. One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to __________.Not learned 90. Fuel oil contamination of an auxiliary diesel engine lube oil can result in __________.Not learned 91. High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by __________.Not learned 92. All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low. Which of the following situations is responsible for this condition?Not learned 93. The purpose of the separating nozzle in the accumulator of a water-tube, coil-type, steam generator is to separate __________.Not learned 94. Which of the following statements concerning fire-tube boilers is correct?Not learned 95. The rate of heat transfer in a water-tube auxiliary boiler can be increased by __________.Not learned 96. Bottom blow valves are installed on auxiliary water-tube boilers to _______.Not learned 97. Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on a boiler, are __________.Not learned 98. The solenoid valves in the fuel oil supply line to an automatically fired auxiliary boiler, are automatically closed by __________.Not learned 99. During unsafe firing conditions in a large automatic auxiliary boiler, various control actuators are interlocked with the burner circuit to prevent start-up, in addition to safety shutdown. These controls are referred to as __________.Not learned 100. The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and __________.Not learned 101. Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the desired steam pressure is obtained?Not learned 102. A diesel engine may fail to start when being cranked, due to __________.Not learned 103. Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________.Not learned 104. If an auxiliary diesel engine equipped with an electric starting system cranks very slowly after repeated attempts to start, the cause could be a/an __________.Not learned 105. A diesel engine could fail to start because of __________.Not learned 106. Excessive vibration in an operating diesel generator may be caused by __________.Not learned 107. Steam drum water level indicators must be calibrated to compensate for density differences between the indicated drum water level, and the actual drum water level. If no compensation is made, the indicator will show a __________.Not learned 108. In the auxiliary diesel engine, shown in the illustration, the __________Not learned 109. The component shown in the illustration, labeled "I", is the __________Not learned 110. A four-stroke cycle auxiliary diesel engine fuel cam has shifted from its original position during maintenance. To ensure correct timing of the fuel pump, the intake and exhaust valves should be in what position when approaching top dead center for injection?Not learned 111. The Fairbanks Morse part labeled "G", as shown in the illustration, is a __________Not learned 112. A photoelectric cell installed in an automatically fired auxiliary boiler burner management system __________.Not learned 113. The adjustable spherically seated self-aligning bearing housings used in turbines are provided with oil deflector rings. The function of these rings is to __________.Not learned 114. On a boiler safety valve, the blowdown adjusting ring is locked in place by a __________.Not learned 115. The boiler water gauge glasses should be blown down __________.Not learned 116. In a coil-type forced circulation water-tube boiler, __________.Not learned 117. Control of the fuel oil metering valve in an automatically fired boiler is accomplished by a __________.Not learned 118. Which of the coupling types listed is shown in the illustrationNot learned 119. In the diagrammatic arrangement of the thrust bearing, shown in the illustration, the direction of shaft rotation and the direction of thrust are indicated respectively by arrows __________Not learned 120. Which of the following conditions is indicated by oil flowing through a lube oil gravity tank overflow sight glass?Not learned 121. Where do fuel oil vapors tend to accumulate in an engine room?Not learned 122. Journal bearings used with turbine rotors are manufactured in two halves in order to __________.Not learned 123. Which of the listed types of safety valves is shown in the illustrationNot learned 124. Many steam plants are designed so that diesel oil can be provided to the burners when __________.Not learned 125. When monitoring a steam propulsion plant lubricating oil pressures, what pressure is the most critical to check regularly while underway?Not learned 126. When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?Not learned 127. When operating with the auxiliary feed line, feed water flow is controlled __________.Not learned 128. Precautions to be observed prior to starting a turbine driven feed pump, should include __________.Not learned 129. To prevent a small plastic refractory wall patch repair from falling into the furnace of a boiler, you should __________.Not learned 130. What is the primary operational difference between a nozzle reaction safety valve and a huddling chamber safety valve?Not learned 131. The property of a fuel oil which is a measurement of its available energy, is known as its __________.Not learned 132. The purpose of the mica used in a boiler water gauge glass assembly is to prevent __________.Not learned 133. A secondary function of the refractory installed in a marine boiler is to __________.Not learned 134. As shown on the illustrated boiler steam drum gauge glass, what do items "D" and "M" representNot learned 135. What statement concerning the operation of a propulsion steam turbine turning (jacking) gear is true?Not learned 136. In terms of the completeness of combustion, in viewing the flame through the peephole, what would be the indication of the MOST complete combustion?Not learned 137. In terms of the diluting effect of excessive excess air, when viewing the flame through a peephole, what would be the indication of the greatest diluting effect with far too much excess air?Not learned 138. The type of turbine shown in the illustration is classified as a __________Not learned