单项选择题
A.boiler water level is low B.feedwater is too hot C.boiler steam demand is low D.feedwater is too cold
Fuel is admitted to a diesel engine cylinder through th...
单项选择题Fuel is admitted to a diesel engine cylinder through the （）.
A.intake valves B.carburetor C.exhaust ports D.injector nozzles
Diesel engine main and connecting rod precision bearing...
单项选择题Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.
A.clearance B.crush C.pitch D.thrust
If an operating auxiliary boiler has a water pH reading...
单项选择题If an operating auxiliary boiler has a water pH reading of 7, you should （）.
A.bottom blow the boiler B.treat the water with caustic soda C.treat the water with chemical scavengers D.reduce the water alkalinity to recommended readings
