问题：
[单选] What is an advantage of diesel over steam turbine propulsion? （）
Less fuel consumption per SHP。Diesel fuel costs less than bunker C or its equivalent。Less routine maintenance required。Less weight per SHP。
问题：
[单选] What is the effect of heated intake air on a diesel engine? （）
Increases efficiency。Increases engine horsepower。Increases engine life。Reduces engine horsepower。
问题：
[单选] What is the operating principal of a flash type evaporator?（）
Sea water is heated to boiling temperature under a vacuum。Sea water is passed over heated plates in a thin film。Heated sea water is injected into a vacuum chamber。Sea water is forced through a heated eductor。
问题：
[单选] What is the purpose of the intake/exhaust valves in a diesel engine? （）
They regulate the combustion cycle。They supply cooling water。They synchronize the ignition spark。They supply and regulate the lubricant flow。
问题：
[单选] What monitoring device best indicates the load being carried by a diesel engine?（）
Lube oil pressure gauge。Jacket water temperature gauge。Tachometer。Exhaust pyrometer。
问题：
[单选] 设X服从参数为λ>0的指数分布，其数学期望EX=（）
λ。λ的倒数。λ的平方。λ的负数。
问题：
[单选] Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.
a exhaust valve。a piston skirt。a piston crown。an air suction valve。
问题：
[单选] 如果细胞甲比细胞乙的RNA含量多，可能的结果是（）
甲合成的蛋白质比乙多。甲含的染色体比乙多。乙合成的蛋白质比甲多。甲含的DNA比乙。
问题：
[填空题] 在并联交流电路中，支路电流有可能（）总电流。
