Marine Engineering Feedwater Temperature Quiz
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Marine Engineering Feedwater Temperature Quiz

Created by
@SweetMeadow

Questions and Answers

If a boiler ignition system on a merchant vessel uses a gas pilot light, which fuel oil ignition method is being employed?

A high energy electric spark

What could be a potential consequence of using lube oil that has not been properly filtered?

Clogging of fuel injectors in the diesel engine

In a diesel engine, what effect could a decrease in the fuel pump delivery pressure have on engine performance?

Increase in injection lag

When operating in parallel, diesel engines driving alternators must maintain a set frequency. What does the governor characteristic 'Promptness' refer to in this context?

<p>Quick response to load variations</p> Signup and view all the answers

What issue could lead to excessive vibration in an automatically fired auxiliary boiler?

<p>Mechanical rigidity in the lube pump mechanism</p> Signup and view all the answers

After filtering lube oil, what contaminant would typically not be removed?

<p>Fuel/Diesel oil</p> Signup and view all the answers

What should you do if it becomes necessary to reduce the feed water temperature below 165°F in an evaporator?

<p>Secure the evaporator until the feedwater temperature can be raised to 165°F or more</p> Signup and view all the answers

What do exhaust pyrometer readings provide an indication of?

<p>Amount of fuel penetration into the engine cylinders</p> Signup and view all the answers

When should fuel combustion in a diesel engine cylinder begin?

<p>End when fuel injection has been completed</p> Signup and view all the answers

Which type of filter will deplete the additives in lubricating oil?

<p>Absorbent filter</p> Signup and view all the answers

What is it called when a change in engine speed is required before a governor can make a corrective movement of the fuel rack?

<p>Speed droop</p> Signup and view all the answers

What will be the result of reducing the clearance between a valve stem and rocker arm?

<p>Decreased valve opening time</p> Signup and view all the answers

Why must diesel engines driving alternators operating in parallel maintain a set frequency regardless of load changes?

<p>To maintain grid stability</p> Signup and view all the answers

What could be a likely cause of excessive vibration in an automatically fired auxiliary boiler?

<p>Combustion pulses</p> Signup and view all the answers

In a diesel engine starting circuit, what would an indicator using a pneumercator primarily measure?

<p>Tank fluid level</p> Signup and view all the answers

When using a dry uncoated sounding rod or tape to measure water depth in a reserve feed water tank, what kind of reading can be expected?

<p>Satisfactory with floating oil on the surface</p> Signup and view all the answers

Where does contaminated oil enter the centrifuge in a disk type centrifugal purifier?

<p>At the bottom through the oil inlet</p> Signup and view all the answers

Why is condensate pumped from the condenser to the DC heater instead of directly to the boiler?

<p>To increase feedwater temperature gradually</p> Signup and view all the answers

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