Q652 - General Subjects, USCG prep certification 2026

Progress: 24% (23/94)

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1. In the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducing valve, what statement is true concerning the pilot and main valvesNot learned 2. For the various sizes of tubing and wall thickness used in a hydraulic system, the inside diameter can be determined if it is remembered that the inside diameter equals the outside diameter less __________.Not learned 3. For the power hacksaw shown in the illustration, how should the teeth point for the blade being installedNot learned 4. Which of the drill sizes listed represents the largest size drill?Not learned 5. Which of the drill sets listed would commonly be referred to as a “Jobbers Set”?Not learned 6. No two drills from differing drill sets are of the exact same size, with the exception of the drills measured as 0.25 inch. These two drills are the 1/4 inch and the __________.Not learned 7. If the speed of a drill is too great, the drill will __________.Not learned 8. Before boring a blind tapered hole, a good shop practice to follow is to __________.Not learned 9. If the cutting edges of a drill are ground at different angles, the __________.Not learned 10. A grinding wheel is trued with a __________.Not learned 11. A metal scribe commonly found on a combination square measuring tool should only be used to __________.Not learned 12. To measure the circumference of a piece of pipe, you should use a __________.Not learned 13. Which of the instruments listed is used to measure the gauge of a piece of sheet metal?Not learned 14. When arc welding, the flux that covers the electrode is used to __________.Not learned 15. When renewing spiral packing in a centrifugal pump stuffing box, after the packing is firmly seated, the packing gland nuts should be __________.Not learned 16. Charring or glazing of the inner circumference of the packing rings in a centrifugal pump is caused by __________.Not learned 17. Which of the following statements is true regarding mechanical seals?Not learned 18. The function of seal cages, or lantern rings installed in the centrifugal pump stuffing boxes, is to __________.Not learned 19. Permanent centrifugal pump shaft damage due to erosion, corrosion, and wear at the stuffing box is usually prevented by __________.Not learned 20. One disadvantage of using a mechanical shaft seal instead of mechanical packing is that __________.Not learned 21. A pump shaft that is bent or distorted should normally be __________.Not learned 22. Which of the following bilge pumping applications would most likely use a non-automated centrifugal pump under manual supervision?Not learned 23. One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the _______.Not learned 24. If a centrifugal pump were continually operated with the discharge valve closed, the __________.Not learned 25. To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out?Not learned 26. A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?Not learned 27. Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump, results from cavitation in the fluid being pumped. Cavitation describes the formation of __________.Not learned 28. A spur gear pump should be operated with the discharge valves __________.Not learned 29. In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modern low-pressure air compressors?Not learned 30. If one drive belt on an air compressor is found to be worn you should __________.Not learned 31. Which of the following compressors on a motor ship would most likely operate at approximately 100 psig?Not learned 32. How often should the air receivers on a compressed air system be drained of moisture and emulsions?Not learned 33. Which of the following statements represents the proper procedural sequence for adjusting the metering rate of an in-line lubricator as used in a ship's service air system hose station? Assume that the pressure regulator has been properly set.Not learned 34. Which of the following statements represents the proper criteria to decide when to drain a filter/moisture separator as used in a ship's service air system hose station?Not learned 35. In a twin-tower desiccant type air dryer using silica gel as an adsorbing agent, what is the procedure for rejuvenating the tower presently on service when the desiccant becomes saturated with moisture?Not learned 36. The general purpose of a heat exchanger is to __________.Not learned 37. If both the shell-and-tube lube oil cooler and shell-and-tube jacket water cooler of a diesel engine are sea water-cooled, what statement is true?Not learned 38. With regard to the number of passes through the tubes of shell-and-tube heat exchangers, what statement is true?Not learned 39. If a heat exchanger is designed to cool lubricating oil using sea water as a cooling medium, what statement is true?Not learned 40. If a heat exchanger is designed to evaporate sea water using diesel engine jacket water as an evaporating medium, what statement is true?Not learned 41. For a given shell diameter and tube sizes for a shell-and-tube heat exchanger, which tube pitch pattern would be the most compact design allowing for the most tubes?Not learned 42. For a shell-and-tube heat exchanger, which tube pitch pattern would feature "see-through" lanes and would most easily allow external mechanical cleaning of the tubes?Not learned 43. Concerning the baffles of a shell-and-tube heat exchanger, what statement is true?Not learned 44. For marine-type shell-and-tube heat exchangers, what is the most common arrangement for baffles?Not learned 45. With regard to the flow patterns associated with plate type heat exchangers, which flow pattern is able to achieve counterflow on opposite sides of each heat exchange plate?Not learned 46. Under what conditions is it permissible to pump machinery space bilges directly overboard without processing by an oily-water separator?Not learned 47. What is meant by the term independent bilge suction?Not learned 48. What is meant by the term emergency bilge suction?Not learned 49. What type of fuel oil as part of an oily-water mixture is most likely to have a density approaching that of water?Not learned 50. What type of oil as part of an oily-water mixture is most likely to require heating to facilitate separation in an oily-water separator?Not learned 51. What statement is true with regard to the basic operating principle of gravity associated with an oily- water separator?Not learned 52. What type of disinfection system has the disadvantage that it would fail to provide residual disinfectant in the potable water?Not learned 53. Which of the following statements concerning the arrangements of a potable water system is true?Not learned 54. What is the primary purpose of the lead-lag arrangement of the two potable water pumps supporting a typical potable water system?Not learned 55. The pressure of an operating hydraulic system, as indicated by a pressure gauge, is a result of the fluid flow overcoming __________.Not learned 56. An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of __________.Not learned 57. In application, which of the listed sealing devices is most similar to an O-ring?Not learned 58. Strainers are commonly used in hydraulic systems to __________.Not learned 59. The determining factor for the strength of a flexible rubber hydraulic hose is the __________.Not learned 60. A flare-type tubing connector is used in the hydraulic hatch cover system and has developed a slight leak. To stop the leak, you should __________.Not learned 61. The output volume of a positive fixed displacement pump can be changed only by __________.Not learned 62. Both the direction of flow and fluid flow rate of a variable displacement radial piston pump are determined by the relative positions of the __________.Not learned 63. To convert a vane type hydraulic pump to a hydraulic motor, which of the following would have to be done?Not learned 64. A two-stage hydraulic pump unit is used to __________.Not learned 65. With an increase in temperature, the volume of hydraulic fluid __________.Not learned 66. Which characteristic or condition will have the greatest effect on increasing a hydraulic oil's viscosity?Not learned 67. Energy losses occurring in a hydraulic system are ultimately absorbed by the __________.Not learned 68. In an electro-hydraulic steering system, damage due to rudder shock is prevented by __________.Not learned 69. What do hydraulically, servo-operated, automatic, changeover valves, used in a two-ram hydraulic steering gear accomplish?Not learned 70. When making welding repairs to a ship's structural member, why is it important to avoid weld faults?Not learned 71. When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality weld when welding a single-V butt joint?Not learned 72. When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality weld when welding a single-V butt joint?Not learned 73. When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality weld when welding a single-V butt joint?Not learned 74. Which of the following propulsor types would be used with unidirectional propulsion shafting rotation?Not learned 75. What type of propeller consists of a flat disc set flush with the under surface of the vessel's hull with a number of vertical, rudder-like blades projecting from it?Not learned 76. Concerning the operating mechanism of a controllable-pitch propeller, what statement is true?Not learned 77. When an electricity generating plant features shaft-driven generators, what type of propulsor is generally used for main propulsion?Not learned 78. Concerning steerable internal duct thrusters, what statement is true?Not learned 79. What statement represents the fundamental difference between an azimuthing thruster and a podded propulsor?Not learned 80. By what means is electric current conveyed to the electric drive motor of a podded propulsor?Not learned 81. What is the primary advantage of transverse bow and stern tunnel thrusters when installed on ships?Not learned 82. Which set of operating conditions would be most problematic in terms of the deterioration of the insulation resistance of the drive motor of an electric motor driven transverse tunnel bow thruster?Not learned 83. As it pertains to the automatic electric brake of a horizontal electro-mechanical anchor windlass, what statement is true?Not learned 84. A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake handwheels, two clutch control levers, and a multipoint lever-operated pedestal-mounted controller. What statement is true as it pertains to the operation of the pedestal-mounted controller?Not learned 85. A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake handwheels, two clutch control levers, and a multipoint lever-operated, pedestal-mounted controller. What statement is true as it pertains to the operation of the manual brake handwheels?Not learned 86. In attempting to start the hydraulic pump drive motor of a horizontal electro-hydraulic anchor windlass, what condition would prevent the electric motor from starting?Not learned 87. As it pertains to the automatic hoist winch brake of an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?Not learned 88. As it pertains to the hoist motion limits associated with an electro-hydraulic cargo-handling pedestal- type deck crane, which statement is true?Not learned 89. What statement is true concerning the door interlock devices associated with a winding drum or traction drive passenger elevator onboard ship?Not learned 90. A ball or roller bearing has an interference fit with the shaft upon which it is being installed with a hydraulic or arbor press. Upon what surface should the sleeve of the press be applied?Not learned 91. Rolling element bearings may experience fatigue failure after a length of service. What is the first evidence of the beginnings of fatigue failure?Not learned 92. What is the primary indication of a grease lubricated bearing that is over-lubricated in terms of the quantity of grease in the housing?Not learned 93. What is the name of an internal passage of watertight construction fitted along the centerline between the double bottoms of some ships, usually from the forepeak to the forward machinery space bulkhead, used to carry pipe work along the length of the ship to the various holds or tanks?Not learned 94. How is access to the double bottom tanks usually provided for inspection, cleaning, maintenance, and repairs of tank interiors?Not learned 95. As it applies to a transverse-framed ship with double bottom construction, what does the term "floor" represent?Not learned 96. What is the name of the opening in a bilge margin bracket that reduces the weight of the bracket without materially reducing its strength?Not learned 97. Even though bilge keels do provide some improvement in longitudinal strength at the bilge radius, what is the primary purpose of the bilge keels?Not learned 98. In terms of ship construction framing methods, which statement is true concerning the transverse framing system?Not learned 99. What statement is true concerning the plating meeting at the gunwales of a ship?Not learned 100. Suppose a prime mover rotates at a steady speed of 900 rpm at rated full load and rotates at a steady speed of 1000 rpm at no load. Assuming that no adjustments have been made to the governor speed control setting, what is the speed regulation of the prime mover expressed in percent?Not learned 101. What is one benefit of maintenance of proper air circulation in an air-conditioned cargo space?Not learned 102. In an air conditioning system, what is the name of the chamber where the duct-work originates?Not learned 103. In a two-stage centrifugal air conditioning system such as the one illustrated, the liquid refrigerant passes from the condenser directly to what componentNot learned 104. What statement is true concerning a one-pipe hydronic heating system?Not learned 105. What statement is true concerning a two-pipe hydronic heating system?Not learned 106. What type of centrifugal fan is characterized by the highest operating efficiency?Not learned 107. What pressure drop across an air conditioning filter is indicative of a need to replace or clean the filter as appropriate?Not learned 108. What statement is true concerning steam-heated, hot water heated, or electric-heated convectors?Not learned 109. Which of the fluids listed is suitable and commonly used as a secondary refrigerant?Not learned 110. The amount of HCFC-123 in a storage cylinder is measured by what means?Not learned 111. What is the physical state and pressure condition of refrigerant as it leaves a receiver in a typical refrigeration system?Not learned 112. The "tare weight" of a refrigerant storage cylinder refers to what weight?Not learned 113. What is the pressure and condition of the refrigerant entering the receiver of a refrigeration system?Not learned 114. A device used to hold open the refrigeration compressor suction valve during starting to reduce the compression load is called what?Not learned 115. The carbon seal ring of a refrigeration compressor crankshaft mechanical seal is held in position against the stationary ring face by using what device?Not learned 116. On a modern refrigerated container unit employing suction modulation for the purposes of capacity control and capacity limitation, what happens when the applied voltage and current draw associated with the normally open (NO) suction modulation valve located in the suction line both increase?Not learned 117. Which of the following illustrated thermal expansion valves would be appropriate to use on an evaporator coil with an 8 psi pressure drop, where externally adjustable superheat and a replaceable power element are both desiredNot learned 118. Alkylbenzene ISO 32 cSt synthetic refrigerant oil is miscible and suitable to use with which of the following refrigerants?Not learned 119. During operating periods of a multi-box refrigeration system using a capacity controlled compressor, when only one of the evporators of a four box plant are actively being fed with liquid refrigerant, the control oil pressure acting on the hydraulic relay piston will be at what valueNot learned 120. Before charging a refrigeration unit, unless quick disconnect fittings are used, the refrigerant charging hoses should be prepared in what way?Not learned 121. What must be done, at a minimum, before a system can legally be opened up for repairs while adhering to the prohibition against the venting of halogenated fluorocarbon refrigerants to the atmosphere?Not learned 122. What is the correct color-coding of refrigerant recovery cylinders regardless of the refrigerant contained within?Not learned 123. In a refrigeration system, the push-pull technique can be used for the recovery of the refrigerant in what state?Not learned 124. What is an example of an epicyclic gear?Not learned 125. Which of the listed reduction gear sets has the input and output shafts in-line with one another?Not learned 126. If the bearings of a piece of machinery are force-fed by a pressure-feed lubricating oil system, which statement is true?Not learned 127. Preferably when should the bridge be informed when engine room situations may affect the speed, maneuverability, power supply, or other essentials for the safe operation of the ship?Not learned 128. Which of the following bearing types would be an example of a plain bearing which substitutes fluid friction for sliding friction?Not learned 129. Which of the following statements is true concerning the application for an isochronous governor?Not learned 130. Concerning governor speed droop, what statement is true?Not learned 131. Which term represents the ability of a speed control governor to maintain prime mover speed without hunting?Not learned 132. Which of the following speed control devices is used strictly as a safety device to prevent prime mover damage and acts by shutting down the prime mover?Not learned 133. In which lubrication application is a detergent type oil most likely to be used?Not learned 134. What is the operating principle of detergent type lubricating oil that provides the oil with its unique properties?Not learned 135. With respect to lubricating oils, what statement is true concerning viscosity and viscosity index?Not learned 136. Which of the following statements best describes the filtering ability of a fine mesh metal lube oil strainer?Not learned 137. Which of the filter/strainer units listed permits you to clean the element while leaving the system on the line?Not learned 138. What type of diesel engine lubricating oil filtration scheme filters a small portion of the output of the lubricating oil pump prior to delivery back to the sump via a fine filter?Not learned 139. Of the following propulsion modes, which one would operate with a geared-drive featuring a double reduction?Not learned 140. Which of the following couplings or clutches allows, within limits, a certain degree of slip?Not learned 141. Which of the listed temperature sensors consists of finely coiled wire, such as platinum, where the resistance varies directly with temperature?Not learned 142. For a pneumatic transmission system for instrumentation purposes, if a pneumatic temperature indicator has a calibrated scale of -40 to +40°F, what would be the actual measured temperature if the transmitted pneumatic signal pressure to the indicator is 9 psig, assuming the industry standard of 3 to 15 psig is used for instrument air?Not learned 143. Which of the following direct pressure measuring instruments is most appropriately used for measuring most pressures, typically above 10 psig and is by far the most common type?Not learned 144. What is used to protect a direct sensing steam pressure gauge from damage from contact with steam?Not learned 145. Which of the following rotational shaft speed sensors produces a digital signal?Not learned 146. Which of the following liquid level sensors would be most suitable for measuring the liquid level in a pressure vessel, such as a water-tube boiler steam drum?Not learned 147. How would the pressure setting of the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducer be reduced to a lower setpointNot learned 148. In a closed-loop process control system, what term is used to describe the action of measuring the difference between the actual result and the desired result and using that difference to drive the actual result toward the desired result?Not learned 149. In a closed-loop process control system, what statement concerning feedback is true as it relates to stability and the direction of error displacement?Not learned 150. In a closed-loop process control system featuring negative feedback, what is the function of the error detector within the controller?Not learned 151. What is another name for the control mode used in a process control system that uses two-point control?Not learned 152. On a ship with a periodically unmanned engine room, under what conditions must the propulsion console be continuously manned?Not learned 153. Under which of the listed conditions can the engine room retake the throttle control from the bridge of an automated vessel?Not learned 154. In accordance with 33 CFR Subchapter O (Pollution), which type of Marine Sanitation Device (MSD) is used solely for the storage of sewage and flush water at ambient air pressure and temperature?Not learned 155. According to the illustration, which of the following conditions would most likely cause Pump "A" to short cycleNot learned 156. What advantage does a 4-pipe hydronic heating/cooling system have over a 2-pipe hydronic heating/cooling systemNot learned 157. The air charge leaving an intercooler or after cooler of an air compressor can be expected to be which of the following?Not learned 158. At appropriate intervals, inspection rounds should be made of the main propulsion plant, auxiliary machinery, and steering spaces. If bilge levels are identified to be high, they should be __________.Not learned 159. The best tool to use to measure the number of threads per inch on a bolt is a __________.Not learned 160. Bridge orders must be promptly carried out and a record kept. What orders must be recorded?Not learned 161. Capacity control of a centrifugal refrigeration compressor can be accomplished by what means?Not learned 162. A 'centerline' depicted in a drawing or blueprint is represented by which of the figures shown in the illustrationNot learned 163. Through which of the components shown in the illustration is flash gas formation a normal occurrenceNot learned 164. In a compression type automatic grease cup, the lubricant is forced into the bearing by__________.Not learned 165. Concerning the proper installation of the sensing bulb of a thermal expansion valve that is attached to the evaporator tail coil on a horizontal run, what statement is true?Not learned 166. The device illustrated would be best used as a __________Not learned 167. The device shown in the illustration is a/an __________Not learned 168. Which of the devices shown in the illustration is designed for both inside and outside measurementsNot learned 169. In what remote temperature indicating system is a voltage generated by the magnitude of temperature difference between hot and cold junctions?Not learned 170. You are on a ship with a large slow speed main engine that operates an Unattended Machinery Space. When entering the main machinery space to conduct maintenance or a machinery space round, what should be done?Not learned 171. Which of the fasteners in illustration GS-0080 would be used in conjunction with figure "C" in illustration GS-0015Not learned 172. Which of the figures illustrated would be LEAST desirable for use as a set screwNot learned 173. In the figure shown in the illustration, the standard blueprint symbols above the letters "A", "B", and "C" indicate __________Not learned 174. Which of the following components listed is shown in the illustrationNot learned 175. Which of the following compressors would be used for a dead ship start-up of a ship's service diesel- generator on a motor ship?Not learned 176. Which of the following lube oil filters would be considered acceptable for use with today's high detergent additive type oils?Not learned 177. Which of the following roller bearing types would be limited to radial thrust load applications?Not learned 178. Which of the following statements is true concerning the gauge labeled "A" of the illustrated gauge manifold setNot learned 179. Which of the following statements is true concerning the illustrated gauge manifold setNot learned 180. Which of the following statements is true concerning the operation of the device shown in the illustrationNot learned 181. In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time?Not learned 182. The function of item "7" shown in the illustration is to __________Not learned 183. Generally speaking, when using a twist drill to bore a hole in metal, the harder the metal, the greater the drill's required __________.Not learned 184. A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake handwheels, two clutch control levers, and a multipoint lever-operated pedestal- mounted controller. What statement is true as it pertains to the operation of the windlass clutch control levers?Not learned 185. The hydraulic tubing installation shown as figure "D" is INCORRECT and will probably leak when in operation because the tubing __________Not learned 186. Which of the illustrated devices would be the LEAST accurate for the purposes of weighing-in a refrigerant chargeNot learned 187. In the illustrated pneumatically operated, diaphragm actuated control valve, what statement is true concerning the opening and closing forces acting upon the control diaphragmNot learned 188. In the illustrated refrigeration system, what is the proper name for the component labeled "A"Not learned 189. In the illustrated self-contained, internal-pilot, piston-operated temperature control valve, what statement is true concerning the pilot and main valvesNot learned 190. In the illustrated single zone HVAC system, what statement represents the functioning of the diverting relay as it controls the cooling coil flow and the exhaust, outside air and recirculation dampersNot learned 191. In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampersNot learned 192. In the illustration, line "C" is a __________Not learned 193. In the illustration shown, what is the proper description of the hole represented by "C"Not learned 194. What is the length of the stud used to secure the packing gland shown in the illustrationNot learned 195. The line labeled "C", as shown in the illustration, would be identified as the ______Not learned 196. The line labeled "G", as shown in the illustration, would be identified as the ______Not learned 197. Which of the listed temperature sensors is made of heat-treated metallic oxides and generally has a negative coefficient of resistance?Not learned 198. Which of the listed valve types is typically used for the low-pressure stage of a reciprocating air compressor?Not learned 199. The locking plates shown in the illustration are used in many marine applications. Which figure indicates the improper method for using these devicesNot learned 200. What is meant by the term "deadband" as it applies to prime mover speed control governors?Not learned 201. How would you prevent the rudder from moving while a repair is made on the steering system using the illustrated actuatorNot learned 202. What is the normal direction of flow through the device shown in the illustration while operating in the processing modeNot learned 203. While at normal sea speed the rudder movement stops, but is restored after changing over power units. At the earliest opportunity the faulty power unit is placed in operation with the following results: The main pump discharge/return pressures are equal and there is no rotation of the rotary actuator, regardless of the direction of helm input. Which of the following is the probable cause of the failureNot learned 204. Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by __________.Not learned 205. Over pressurization of an air compressor intercooler is prevented by which of the following?Not learned 206. What is the primary function of the devices shown in the illustrationNot learned 207. In the pump shown in the illustration, what is the distance from the bottom of the inlet to the bottom end of the motor shaftNot learned 208. When reading a pressure that fluctuates severely on a direct-reading pressure gauge, what should be done?Not learned 209. Referring to the illustrated diagram for a central-station hookup for a hot water heating system, what statement represents the configuration of the systemNot learned 210. Referring to the illustrated drawing of the central-station hookup for a hot water heating system, what statement is true concerning the air separator on the heated water outlet of the converterNot learned 211. Referring to the illustrated single zone HVAC system diagram, what statement is true concerning the damper controlsNot learned 212. Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is running. The check valve in line "G" is closed. Valve "B" is closed. Valve "D" is open. What is the operational status of the oily-water separator unitNot learned 213. With respect to a "pusher" type azimuthing thruster, what statement is true?Not learned 214. With respect to shaft bearing load absorption capability in terms of direction, what is meant by a radial load?Not learned 215. When responding to a "right rudder" command from the amidships position, which parts of the steering gear system illustrated will be subjected to the highest pressureNot learned 216. On a ship with a periodically unmanned engine room, what statement is true concerning internal fuel transfers?Not learned 217. As shown in figure "B" in the illustrated block diagram of a central operating system configured for supervisory control, what is the function of the block "ANALOG (A-D MUX)"Not learned 218. As shown in figure "B" of the illustrated block diagram of a central operating system configured for supervisory control, which statement is true concerning the block "COMPUTER" with respect to closed-loop control processesNot learned 219. As shown in figure "B" of the illustrated self-contained recovery unit connection diagrams, what is the recovery method supported by the connection schemeNot learned 220. As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL CONTACT" representNot learned 221. As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL OUTPUT" representNot learned 222. Spring reinforced oil seals for retention of lubricant, are installed with the lip of the seal facing __________Not learned 223. What statement is true concerning the term "isochronous" as it applies to prime mover speed control governors?Not learned 224. Suppose the illustrated pneumatically operated diaphragm actuated control valve is used to control the fuel oil outlet temperature of a steam-heated heavy fuel oil heater by controlling the steam flow. What would be the result if there was a complete loss of pilot air being delivered to the valve actuatorNot learned 225. Suppose the illustrated self-contained, internal-pilot, piston-operated temperature control valve is part of the temperature control system for a steam-heated heavy fuel oil service heater for a steam boiler. If there was an increase in demand for fuel by the boiler, what statement correctly represents how the valve would initially respondNot learned 226. Suppose the pilot pressure is from 3 to 15 psig for the illustrated pneumatically operated, diaphragm actuated control valve. Assuming the control valve is trimmed for a linear response and the travel position indicator is calibrated in percentage, what would be the approximate pilot pressure if the position indicator showed the valve to be 75% openNot learned 227. Suppose the pilot pressure range is from 3 to 15 psig for the illustrated pneumatically operated diaphragm actuated control valve. Assuming the control valve is trimmed for a linear response and the travel position indicator is calibrated in percentage, what would be the approximate valve position with a 9 psig pilot pressureNot learned 228. The term "oil foaming" in refrigeration practice, is used to describe what event?Not learned 229. Which term represents the change in speed required before a speed control governor will initiate corrective action as the load changes?Not learned 230. What type of pump is shown in the illustrationNot learned 231. A typical oily-water separator has three stages of separation. Which statement represents the correct sequential order of the stages?Not learned 232. The working depth of the gear illustrated is represented by __________Not learned 233. With regard to the relative flow patterns through the tubes and the shell of single pass shell-and-tube heat exchangers, what statement is true?Not learned 234. The safety heads of most large reciprocating compressors used in refrigeration systems are held in place by what means?Not learned 235. How is accidental flooding of the engine room bilges through the bilge system prevented?Not learned 236. The rudder torque capacity of the four-ram steering gear illustrated, is rated at 44,210,000 inch-pounds with one power unit in operation. If the four-ram system was able to be operated as a two-ram system with both power units on line, what would be the available torqueNot learned 237. With respect to shaft bearing load absorption capability in terms of direction, what is meant by an axial load?Not learned 238. During operating periods of a multi-box refrigeration system using a capacity-controlled compressor, when all of the evaporators of a four box plant are actively being fed with liquid refrigerant, the control oil pressure acting on the hydraulic relay piston shown in the illustration will be at what valueNot learned 239. Which of the following illustrated thermal expansion valves would be appropriate to use on an evaporator coil with a 2 psi pressure drop, where externally adjustable superheat and a replaceable power element are both desiredNot learned 240. What is the physical state and pressure condition of refrigerant as it enters the condenser of a typical refrigeration system?Not learned 241. A ball or roller bearing has an interference fit with the housing in which it is being installed with a hydraulic or arbor press. Upon what surface should the sleeve of the press be applied?Not learned 242. In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time?Not learned