单项选择题
Fuel oil is regularly transferred to the day tank in order to （）
A.allow impurities to settle out of the fuel B.allow air to escape from the fuel C.make fuel available for immediate use D.all of the above
单项选择题 Starting air valves are held firmly on their seats by（）
单项选择题 The depth of fuel oil in a tank is normally measured through the（）
单项选择题 Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）
