The mechanical exhaust valve operation system is replaced by

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.

A.low firing pressure

B.low exhaust temperature

C.mechanical knock in each cylinder

D.fuel knock in each cylinder

You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?

A.Cut in another IG fan to increase gas flow

B.Open the pressure control valve until the pressure increases

C.Open the tank isolation valve to the fully open position

D.Reduce the pumping rate

High cylinder firing pressure, accompanied by low exhaust temperature, can result from ___.

A.improper fuel rack positing

B.lengthy exhaust valve duration

C.extend operation at light load

D.excessively early injection timing

During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.

A.effective cylinder scavenging and cooling

B.constant pressure from the turbochargers

C.cooler operation of the exhaust system

D.effective constant pressure for turbocharger operation

Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．

A.warm up the exhaust blower motor

B.provide a proper supply of fresh air for the engine（s）

C.see the system is in good operating condition

D.insure at least one complete change of air in the compartments concerned

Operation of the valve control release on a fixed CO2 system must immediately ______.

A.release CO2 to the protected space

B.secure all mechanical ventilation in the protected space

C.sound the rig’s general alarm signal for a fire

D.sound an alarm in the ballast control room