In an auxiliary diesel engine, the reason for knurling the piston skirt is to（）

A . low exhaust back pressure B . high lube oil temperature C . insufficient cranking speed D . excessive fuel atomizatio

A . Full power cannot be developed B . The exhaust will contain black smoke C . Complete combustion will be impossible D . All of the above

A . a glazed surface on the spring B . nicks in the protective coating C . a build up of sludge deposits D . cracks in the surface of the spring

A . caustic embrittlement of the boiler metal B . acidic corrosion of the boiler metal C . hard scale deposits on the boiler tubes D . etching of the heat exchange surface

A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

A . check the air filter for obstruction B . check for an exhaust leak C . check the exhaust temperature D . secure the engine

A . increased fuel consumption B . increased feed water consumption C . fuel pump failure D . combustion control system failure

A . maintain higher than normal jacket water temperature B . change the lube oil more frequently than normal C . maintain a higher air-box temperature than normal D . maintain a higher air-box pressure than normal

A . a burned out solenoid in the oil supply valve B . high temperature excess air C . incorrectly setting the hot-well dump valve D . an incorrectly positioned burner snubber realy

A . steam stop valve B . dry pipe C . feedwater system D . generating tube

A . air supply is shut off B . fuel supply is shut off C . water supply is shut off D . safety valve lift

A . increase B . decrease C . remain the same D . increase on compression decrease on expansio

A . later and close sooner B . sooner and close later C . sooner and close sooner D . later and close later

A . low exhaust back pressure B . air in the fuel system C . gasket blow-by or leakage D . incorrect assembly of idler spring

A . dissolved oxygen B . chlorides C . sludge D . dissolved nitroge

A . soap hardness B . nitrog encontent C . chloride content D . dissolved CO

A . monkey B . donkey C . waste heat D . mai

A . cavitation erosion in the water jackets B . excess corrosion inhibitor in the coolant C . dirty jacket water cooler D . defective turbocharger

A . excessive purging before lighting off B . insufficient trail for ignition period C . a faulty transformer in the ignition circuit D . insufficient purging before lighting off

A . incorrect electrode setting B . incorrect nozzle position C . clogged fuel nozzle D . broken high tension lead

A . Clean all electrical connections B . Lift the relief valves by hand C . Inspect and clean all solenoid valves D . Inspect for oil and water leak

A . relight the boiler immediately to prevent loss of steam pressure B . relight the fire off the brickwork as the bricks are cherry red C . purge the furnace of any combustible gases before attempting to relight the fire D . speed up the feed pump to prevent dry firing when the burner flame is reestablished

A . fuel pump failure B . fan motor failure C . increased feedwater consumption D . decreased boiler efficiency

A . manoeuvring operations B . bad combustion C . cooling D . mooring trial