Small Vessel Second Engineer 060-01 Exam: Marine Diesel Engineering
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Questions and Answers

Explain the term 'atomisation' with reference to the combustion of fuel.

Breaking down of fuel into fine mist for better combustion.

State the factors that influence atomisation in the combustion of fuel.

Factors include fuel pressure, fuel viscosity, and fuel temperature.

Explain the purpose of labyrinth glands in diesel engine turbocharger construction.

To prevent air leakage in the turbocharger.

Describe the transfer of gas force from the piston crown to the crankshaft in a four-stroke diesel engine.

<p>The force is transferred through the connecting rod to the crankshaft.</p> Signup and view all the answers

Describe the principle of operation of a simple hydraulic governor.

<p>Hydraulic governors regulate engine speed by controlling the flow of hydraulic fluid to adjust the fuel supply.</p> Signup and view all the answers

Explain the operation of an overspeed trip of the centrifugal type.

<p>It activates when the speed exceeds the set limit, causing a mechanism to trip and shut down the machine.</p> Signup and view all the answers

Describe the main components of a fuel injector nozzle.

<p>The main components are the nozzle body, needle valve, and nozzle tip.</p> Signup and view all the answers

What are the factors influencing centrifugal separator efficiency?

<p>Factors include bowl speed, temperature, viscosity, and feed rate.</p> Signup and view all the answers

How can oil loss be minimized in a centrifugal separator?

<p>Oil loss can be minimized by adjusting the water level and ensuring proper maintenance.</p> Signup and view all the answers

What determines the discharge frequency of an engine lubricating oil purifier?

<p>The factors include the oil quality, engine load, and operating conditions.</p> Signup and view all the answers

What are possible reasons for variations in the oil level of a main engine sump?

<p>Variations can be due to leaks, temperature changes, oil consumption, or improper maintenance.</p> Signup and view all the answers

Why should lubricating oil be supplied before main reduction gearing rotates?

<p>Providing oil before rotation ensures proper lubrication and reduces wear on the gearing.</p> Signup and view all the answers

What condition monitoring techniques can be used to assess the main reduction gearing?

<p>Techniques include vibration analysis, oil analysis, thermography, and visual inspections.</p> Signup and view all the answers

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