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

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

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

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

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

207. Dirty condenser in a refrigeration system would indicate ?

208. The rotary motion of a diesel engine crankshaft is obtained from the up and down motion of the piston via the?

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

210. How is the pressure and temperature affected in a diesel engine cylinder during compression?

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

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

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

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

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

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

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

218. What will be the result if carbon deposits accomulates in the burner throat and diffuser rings of boiler

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

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

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

222. What will happen if the needle valve in a fuel injection nozzle sticks open ?

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

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

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?

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

227. What happens when oil is heated up ?

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

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

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

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

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

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

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

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

237. Burned gas from each cylinder is directed to the exhaust manifold which is part of ?

238. When chemical energy of the fuel is converted to thermal energy during boiler operation, the conversion process occurs where ?

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

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?

242. Positive displacement helical gear pumps are well suited for pumping oil because ?

243. The measured temperature indicates the ?

244. Which of the following components is directly connected to the propellers and lies mainly encased in the stern tube?

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

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

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

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 ?

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

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

251. Which of the following methods is used to counter axial thrust in a single flow reaction turbine ?

252. Which is the function of a boiler diffuser assembly?

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

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

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

256. Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinder. If the cooling temperature from an individual cylinder begins to rise what should you suspect ?

257. Centrifugal pumps, used to handle hot liquids, must have a minimum flow through them under all operating conditions. This flow serves to ?

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

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

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

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

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?

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

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

265. It is a form of energy which crosses the boundary of a system during a change of state produced by a difference of temperature between the system and its surroundings.

266. The high pressure cut-out switch will stop the refrigeration compressor when there is ?

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

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

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

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

271. In a diesel engine, the fuel consumption is expressed in ?

272. Which of the following controls the amount of fuel atomized by a return flow oil burner ?

273. Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from ?

274. If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the

275. Which of the following characteristic that determines the temperature to which fuel must be heated for proper atomization is ?

276. Stern tube is used to ?

277. Differential needle valves used in fuel injectors are directly closed by what?

278. An excessive pressure differential across a lube oil strainer could indicate the ?

279. The by-products of oxidation, as a result of water contamination of hydraulic oil, are generally ?

280. The action should take when water is found in the fuel oil setting tank is to ?

281. To what purpose why is strainer install on hydraulic system?

282. A mooring winch should be equipped with mechanical brakes capable of holding,

283. You observed an efficiency drop caused by compressor fouling of the gas turbine, what is the most effective counter measure to carry out?

284. What will happened to air compressor unloading system if all of the air charge has been lost from ship service air receiver?

285. Which part of a diesel engine that fuel is admitted into the cylinder combustion chamber?

286. The dimension of the thinnest hydrodynamic film developed within a full journal bearing, when all other factors remain constant, depends upon the ?

287. Diesel engine jacket water is used in the fresh water distillation process as the ?

288. Nozzle diaphragms are installed in pressure-compounded impulse turbines to

289. In the Hydropore tank, What is the device intalled to starts/stops the pump ?

290. Gas turbine has operational flexibility. Which of the following is the reason?

291. What is the reason why steam pressure reduces its pressure while accomplishing work in the engine or turbine?

292. Before loosening pump covers how should the pressure be checked ?

293. What type of engine uses a high cetane number?

294. What is the importance of the control box of a differential gearsystem in a steering gear system?

295. if the water level cannot be seen in the lower part of the boiler gage glass, which of the following actions must be carried out immediately ?

296. The net positive suction head of a boiler centrifugal feed pump should be calculated over and above the

297. A reading of zero on a Bourdon tube instrument generally means ?

298. Which significant combustion elements of fuel oil is a major source of air pollution?

299. If a higher than normal water level is observed through the inspection port of a low pressure distilling plant, you should suspect ?

300. Air trapped in the hydraulic fluid of a steering system would be indicated by: