22. 「摩爾斯碼信號(The Morse symbols)」係由固定「短」「長」的「點(dot)」與「劃 (dash)」之「音頻」或「可見光信號」搭配，組成為不同符號，數字或意義。試問信號與信號間，例如「boy」中的「b與o」或「o與y」之間的時間間隔，依規定是多少「時間單位」? (A) 一 (B) 二 (C) 三 (D) 四

8. You load a liquefied gas which can react dangerously with water so moisture control of cargo tank is required before loading. What dew point of the dry air you should purge into cargo tank to remove moisture prior to loading as per IGC Code (International Gas Carrier Code)? (A) Air which has a dew point of -45 degrees Celsius or below at atmospheric pressure. (B) Air which has a dew point of -40 degrees Celsius or below at atmospheric pressure. (C) Air which has a dew point of -35 degrees Celsius or below at atmospheric pressure. (D) Air which has a dew point of -30 degrees Celsius or below at atmospheric pressure.

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