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 turbocharger 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.If a centrifugal pump gradually develops insufficient discharge pressure as a result of worn wearing rings, which of the following corrective actions is required?

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 ?