38.Fuel oils vary widely in quality and often contain significant amounts of sulfur. Please select a following procedure that can form aquatic sulfuric acid in the exhaust gas path.
(A)Vaporization
(B)Sublimation
(C)Melting
(D)Condensation

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

39.Which section of the shafting system is used to secure the propeller? (A)Thrust shaft (B)Intermediate shaft (C)Stern tube shaft (D)Tail shaft

40.ABC乾粉所以能撲滅D類火災之主要關鍵為何？ (A)稀釋火場的空氣含量 (B)抑止可燃氣體的蒸發 (C)破壞燃燒連鎖反應 (D)降低燃燒溫度

1.觀測者測得某天體上中天高度為70°、方位為180°及下中天高度為40°、方位為000°，則該天 體之赤緯為何？ (A)55°N (B)55°S (C)75°N (D)75°S

2.本船位於緯度24°S ，經度161°45' E ，本船5月4日ZT 06-39-38，求UT？ (A)5月3日，17-39-38 (B)5月3日，19-39-38 (C)5月4日，17-39-38 (D)5月4日，19-39-38

3.傍晚約1800時，月亮在天空的正中央，請問當日的月象為： (A)滿月 (B)下弦月 (C)上弦月 (D)娥眉月

4.1990年2月20日，某船於黎明前，使用船用六分儀測金星，得Hs 26°14.8 ′，IE 1.5在弧外 （off the arc），HE 16公尺，試以航海曆求此時金星的觀測高度（Ho）？ (A)26°05.8 ′ (B)26°07.3 ′ (C)26°07.7 ′ (D)26°08.2 ′