Forest fires can be caused by______.

A . low combustion temperature B . a leaking fuel nozzle check valve C . late fuel injection D . plugged oil-scraper ring hole

A、using a slightly dirty air filter B、using oil having an excessive viscosity C、intercooler or after-cooler leaks D、carrying the oil level higher than normal

A . Paints，varnish，or other liquid flammables are stowed in a dry stores locker B . Inert cargoes such as pig iron are loaded in a wet condition C . Oily rags are stowed in a metal pail D . Clean mattresses are stored in contact with an electric light bul

A . insufficient cooling water flow to the condenser B . a low refrigerant charge in the system C . the liquid valve is open too much D . high evaporator superheat

A . dry chemical B . foam C . high-velocity fog D . water

A . late ignition B . water in the fuel C . high compression temperature D . starting valve stuck ope

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 . high compression pressure B . low intake air temperature C . low exhaust pressure D . high scavenge air pressure

A . low coolant temperature B . insufficient fuel C . high ambient temperature D . carbon buildup on the injector ti

A . excessively late fuel injection B . oil in the air charge C . water in the fuel D . injection continuing after the fuel charge is ignited

A . worn bearings and piston pins B . slugging due to flooding back C . too much oil in circulation D . All of the above

A . the heat B . the fuel C . the oxygen D . any of the above

A . fuel dribbling from leaking fuel injectors B . burning fuel with a high carbon content C . burning fuel with a high vanadium content D . burning fuel with a lower sulphur content

A . excessive compression pressure B . air in the fuel lines C . high fuel pressure D . excessive load

A . insufficient condenser cooling water B . excessive condenser cooling water C . air in the refrigeration system D . excessive refrigerant in the system

A . clogged coolant passages B . a leaking cylinder head gasket C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

A . a worn water pump B . not enough coolant C . air in the cooling system D . all of the above

A . improperly seating intake valves B . leaking cylinder liner seal rings C . late fuel injection timing D . carbon deposits on the pisto

A . air or water in the furnace B . combustion pulses C . fuel oil pump failure D . flame failure