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輪機英語單項選擇題每日一練(2019.08.11)

單項選擇題
The tube in a boiler should be blinded if found （）.
A.scaled
B.informed
C.leaky
D.deformed
單項選擇題
The amount of fuel injection into a diesel engine cylinder by a unit injector, is controlled by（）
A.the firing pressure in the cylinder
B.a metering helix inside the pump
C.varying the physical length of the plunger stroke
D.varying the clearance between the injector cam and the injector rocker arm
單項選擇題
Defective air cooler in a diesel engine will lead to （）.
A.smoky exhaust
B.starting failure
C.overload
D.over speed
單項選擇題
Distilled water from an evaporator may be discharged into a potable water tank （）.
A.through a detachable hose connection
B.after passing through an activated charcoal filter
C.after chemical analysis shows it is fit for consumption
D.through a solenoid operated three-way valve
單項選擇題
Tools with （）handles should be used to check electric circuit.
A.plastic
B.metal
C.stainless steel
D.copper