199. If you were operating a centrifugal water service pump with worn wearing rings, the

261. Scavenging trunks are more prone to fire because they are ?

236. Diesel engine crankcase oil mist detectors are designed to analyze ?

220. Why are relief valves of fuel service pump for boiler burners installed ?

204. How is dissolved oxygen in boiler feed water minimized?

172. In the boilerás combustion control system, when the demand for steam is increased

219. Rapid fluctuations of absolute pressure in the last effect of a multi-effect submerged tube distilling, plant will tend to cause ?

268. As found in a basic pneumatic automatic combustion control system, the function of standarizing, relay is to

225. When an engine coupled with the large vibrational shocks that act on the shafts, there could be a permanent damage to the propeller shafts.Why.?

206. What is known as an air motion induced in a four-cycle diesel engine cylinder to improve air fuel mixing?

157. If turbine rotor shafts extend through the casing, what external source of sealing steam is used in conjunction with labrynith packing ?.

214. The most common diesel engine fuel system problems are caused by ?

191. What is the most important rule for the safe operation of a boiler?

233. A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the_ _.?

146. The possible cause why lube oil pumps fail to build up discharge pressure could be that the ?

150. What type of pump is used in the steering gear of modern ship?

245. In a mechanical compression refrigerating system, what is the main cause of a very low discharge pressure?

260. What is the effect if fuel oil tanks of a vessel is half full ?

213. What is the use of follow-up gear on an electro-hydraulic steering gear?

226. What does an unusual or new vibration in the hull or propeller shafting indicate?

143. If the boiler fires are extinguished by water contamination in the fuel oil, you should FIRST?

167. The bore of a diesel engine describes the ?

169. How will you know the firing rate of boiler using steam atomization indicated?

259. Excessive scale formation in a distilling plant may result from?

180. Why should hydraulic cranes be properly warmed-up before they are used?

201. Which of the following admits air to the piston of a cylinder relay valves in a correct sequence for engine starting?

215. When a fuel injection nozzle overheated which of the problems listed below can be expected?

227. What happens when oil is heated up ?

202. A twin-screw, rotary, positive displacement pump is provided with timing gears. If it were possible to change the lead (pitch) of the screws, which of the following statements would represent the true effect on the pump characteristics?

203. Excessive vibrations created by the main propulsion machinery are detrimental to which equipment listed below-----------?

228. Schedule of soot blowing for economizers is done for at least ?

140. Which of the following component is the primary shaft emerging out of the engine?lt directly receives the rotational motion from the crankshaft and rotates at the maximum velocity in high speed engines.

216. An incinerator is a waste disposal unit that will burn ?

221. Which operating condition of a diesel engine is indicated by excessive firing pressures?

187. The measure of the amount of salt present in water is called ?

145. In an engine operation what is the effect called that describes the unstable operation of the governor that will not maintain a steady state condition ?

258. Which of the following will happen if the fuel oil heater attains excessively high temperature ?

249. In a large slow-speed propulsion diesel engine, the force applied to the piston is

189. The purpose of the six-way valve used in an electro-hydraulic steering system is to,

176. Movement of the pump control rack in a fuel injection system having individual plunger-type pumps

262. In case Engine room is unmanned and Diesel Engine is running, when the temperature of cooling, water outlet is one degree above the limit in long period of time. What is the next immediate better thing to do?

230. In the water tube boiler, the fire in the furnace is located at the ?

205. When fuel viscosity in the service tank needs to be reduced before the atomizer, what should be done ?

159. Visual inspection of a fuel injector valve, removed during overhaul, shows heat discoloration of the lower end of the valve. This is an indication of

148. How many fuel oil heaters are required for main engine operation ?

263. Emergency diesel generator day tank should always be kept full to reduce the possibility of ?

198. Which of the following terms is used to identify the pressure of the liquid ?

224. In addition to a nozzle, a fuel oil atomizer uses which of the listed parts?

174. What is the purpose of the dehydrator in refrigeration?

195. Why is it necessary to transfer fuel oil to the settling tanks ?

253. An internal bypass is provided on some hydraulic system suction strainers to help reduce the posibility of?

152. Gas turbine uses a cycle that includes intake, compression, expansion and exhaust. Which of the following are you going to use to best explain the complete cycle.

192. When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to.

168. How is constant steam pressure maintained?

246. In air conditioning system, which part of the system where the refrigerant begins to boil and flash into gas?

255. Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce ?

200. Irregular feeding or surging of the feedwater supply to a low pressure distilling plant may be attributed to

217. Reduced capacity, vibration and noise at the centrifugal pump suction due to vapor pockets in the fluid being pumped is caused by

243. The measured temperature indicates the ?

232. A badly leaking refrigeration compressor discharge valves will cause ?

269. An air compressor is equipped with an intercooler and an aftercooler to ?

234. Which of the following is the purpose of the diffuser in a burner assembly?

235. If the discharge valve is closed before the drive motor is stopped, which type of pump will most likely be damaged?

231. On a medium pressure, differential piston, reciprocating air compressor, lubrication of the pistons/cylinders is usually accomplished,

165. The function of seal cages, or lantern rings installed in the centrifugal pump stuffing boxes, is to

177. Most fuel injection nozzles are opened by ?

171. Which equipment must be tested NOT more than 12 hours prior to getting underway from a port when the voyage is to be of 48 hours or greater duration?

190. Main engine lube oil sump tank is located ?

137. While overhauling a jerk-type pump and the pump plunger must be replaced. What other part must also be replaced?

197. Which of the items listed below is normally describe a ventilating fan?

212. Why should the boiler fire side be kept free from soot accumulations ?

239. In bunker tanks, which of the following tanks is used in storing fuel ready for immediate use for starting up the diesel engine?

163. Parts of the pump used to maintain the alignment of the pump are ?

162. Which of the listed conditions is responsible for causing the gland leak off steam from a propulsion turbine to pass through the gland exhaust condenser?

247. Purging air from a hydraulic oil system is necessary when ?

173. The purpose of the diffuser in a boiler burner assembly is to

267. In a low pressure air compressor, the loss of volumetric efficiency normally results from ?

138. During injection, the cam nose of the camshaft will push up the plunger of the pump, forcing the fuel to the ?

139. Increasing the speed of a centrifugal pump will result in an increase in the pump capacity. Another means of increasing the total head pressure of a centrifugal pump is to increase the ?

170. Which of the following is the result of excessively high fuel oil temperature ?

254. What is the function of boiler variable capacity pressure regulator in atomizing fuel insside burner

147. Which of the following statement is correct relative to distillation plant operation?

250. Why is it important to apply proper filtering and straining of diesel fuel oil ?

270. In hysraulic system, with an increase in temperature, what will happen to the volume of hydraulic fluid ?

160. An internally mixed steam atomizer requires which of the following compared to a return flow oil burner system?

240. The boiler water having a pH reading of 7.0 is said to be ?

241. What is a practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine?

207. Dirty condenser in a refrigeration system would indicate ?

264. The boiler feedwater control valve varies the relationship between steam and water flow during periods of ?

136. What is the cause of excessively low air pressure occurring in the intercooler of a reciprocating air compressor?

223. Which of the listed turbocharger component increases air density and helps improve engineoperating efficiency?

184. Passages are drilled at the diesel engine crankshaft in order to provide lubricating oil in the ?.

188. Which of the following statement is correct when a piston is said to be at top dead center?

248. Regarding the low pressure evaporator steam control orifice in the live steam supply line, the steam at the outlet of the orifice if not properly conditioned will be developed as ?

141. The greatest decrease in the temperature of a refrigerant is at the

209. What part of an engine transmits the reciprocating motion of the piston to the driven unit in the form of rotary motion?

229. Which items on the list could reduce high salinity in a steaming boiler?

211. If condensate is accumulated in the steam side of a fuel oil heater, it could result in ?

185. If you hear a crackling sound coming from a salt water centrifugal pump casing, the most probable cause of the noise would be ?

178. One of the routine tasks onboard maintenance for Gas Turbine is mainly of daily visual checks of the running engine. What are you going to execute after a fix number of operating hours to remove any salt deposits on the compressor?