31.Turbocharging tends to reduce fuel consumption because the friction losses of the turbocharged engine do not increase as fast as the increase in power output, and because the improved charging results in better combustion conditions. Based on this description, which is the correct statement?
(A)The friction losses of the turbocharged engine are beneficial for reducing fuel consumption.
(B)The better combustion conditions resulted from the improved charging are beneficial for reducing fuel consumption.
(C)The friction losses of the turbocharged engine are beneficial for better combustion conditions.
(D)The increased friction losses of the turbocharged engine are beneficial for better combustion condition.

27.船舶在發航前多少小時以內，船舶之操舵裝置應由該船之船員予以檢查及試驗？ (A)6 (B)8 (C)10 (D)12

28.依SOLAS電力與電動液壓操舵裝置之附加規定，主供電迴路及馬達應備防止過電流之保護裝 置，其電流不應低於受保護馬達或迴路滿載電流之多少倍？(A)1 (B)2 (C)3 (D)4

29.依SOLAS救生艇推進之規定，每艘救生艇應以壓燃式引擎為動力。該引擎所用燃油之閃點 （flash point）應在攝氏幾度以上（採閉杯式試驗法），才能提供救生艇使用？ (A)43 (B)30 (C)20 (D)15

30.Magnetic bearings are used in applications where noise and vibration are important considerations or where lubricants are not acceptable. Like the hydrostatic bearings they do not require shaft rotation to generate bearing support forces. The rotor is floated in the space and levitated by magnetic forces, which are generated within the bearing by magnets. Therefore, (A)the air is necessary to be used as the lubricant to provide the film pressure for magnetic bearings. (B)the air is necessary to be used as the lubricant to reduce the noise and vibration for magnetic bearings. (C)the shaft rotation is important for generating the supporting forces for the magnetic bearings. (D)the magnetic forces are generated in the magnetic bearing to support the load of bearing.

32.Which is the equipment in a ship that often uses the heat recovered from the jacket water of a main diesel engine? (A)Superheater of boiler (B)Freshwater generating plant (C)Exhaust-gas boiler (D)Turbo-generator

33.Misalignment in shafting systems can produce very significant bending loads and this factor is probably responsible for the majority of inboard shafting failures. Therefore, (A)the avoidance of misalignment is mainly for the minimization of outboard shafting failure. (B)the misalignment has no influence on the loads applied on the outboard shafting. (C)most of the inboard shafting failures could be attributed to the misalignment in shafting systems . (D)the misalignment should be artificially introduced during the sea trial.

34.For a seawater cooled condenser in a steam turbine power plant, which is the correct statement regarding the seawater temperature and the performances of condenser? (A)Low seawater temperature permits high vacuum of condenser. (B)Low seawater temperature permits high steam saturated temperature in condenser. (C)Low seawater temperature permits high steam dryness in condenser. (D)High seawater temperature permits high moisture rate of steam in condenser.

35.The principal reason for turbocharging is to increase the power output of an engine of given size and speed, by enabling the cylinders to be charged with air at an elevated pressure and, therefore, at a higher density than air at atmospheric pressure. What is the main purpose to use a turbocharger? (A)To elevate the density of air in order to decrease the pressure in cylinder. (B)To elevate the pressure of air in order to decrease the density in cylinder. (C)To improve the power output of an engine of given size and speed by increasing the compressed air intake temperature. (D)To improve the power output of an engine of given size and speed by increasing the density of charged air.

36.The main function of the intercooler of a multistage air compressor is . (A)to increase the enthalpy of working fluids (B)to increase the entropy of working fluids (C)to reduce the specific volume of working fluids (D)to increase the internal energy of working fluids

37.Which equipment is an ejector that operates with a liquid motive fluid? (A)Eductor (B)De-ballasting device (C)Ventilation gear (D)Cavitation damper