Podcast
Podcast
Podcast
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Questions and Answers
Questions and Answers
Why should the air outlet from the turbocharger be cooled before entering the diesel engine cylinder?
Why should the air outlet from the turbocharger be cooled before entering the diesel engine cylinder?
To increase the density of the air and improve combustion efficiency
Why does the charge air cooler have fins attached to its tubes?
Why does the charge air cooler have fins attached to its tubes?
To increase the heat transfer rate
State possible reasons why the charge air cooler's performance may be reduced.
State possible reasons why the charge air cooler's performance may be reduced.
Possible reasons include fouling, corrosion, or leakage
Identify the component parts A-E in the section of timing chain shown in the figure below.
Identify the component parts A-E in the section of timing chain shown in the figure below.
Explain the reasons why chains may elongate or slacken in service and the areas that may wear.
Explain the reasons why chains may elongate or slacken in service and the areas that may wear.
Describe a procedure for manually testing the set points on diesel generator HT cooling water, high temperature alarm, and shut down.
Describe a procedure for manually testing the set points on diesel generator HT cooling water, high temperature alarm, and shut down.
How can the pump sketched in part (a) vary the end of delivery?
How can the pump sketched in part (a) vary the end of delivery?
What is the meaning of the term 'microbial contamination' in relation to diesel engine fuel?
What is the meaning of the term 'microbial contamination' in relation to diesel engine fuel?
What problems may a diesel engine encounter if the fuel is contaminated with microbes?
What problems may a diesel engine encounter if the fuel is contaminated with microbes?
How can microbial contamination in diesel fuel be avoided?
How can microbial contamination in diesel fuel be avoided?
What actions should be taken if microbial contamination in diesel fuel is severe?
What actions should be taken if microbial contamination in diesel fuel is severe?
What are FOUR functions of lubricating oil in a diesel engine?
What are FOUR functions of lubricating oil in a diesel engine?
Explain the terms 'hydrostatic lubrication' and 'boundary lubrication' in the context of lubricating oil.
Explain the terms 'hydrostatic lubrication' and 'boundary lubrication' in the context of lubricating oil.
What is one advantage and one disadvantage of using grease as a lubricant in a plain bearing?
What is one advantage and one disadvantage of using grease as a lubricant in a plain bearing?
Sketch the assembly of a plate-type heat exchanger, label the main components, and indicate the direction of flow.
Sketch the assembly of a plate-type heat exchanger, label the main components, and indicate the direction of flow.
Describe the possible causes and remedies for low lubricating oil pressure in a diesel engine.
Describe the possible causes and remedies for low lubricating oil pressure in a diesel engine.
What are three advantages and three disadvantages of using a wet clutch in a friction clutch system?
What are three advantages and three disadvantages of using a wet clutch in a friction clutch system?
What is one advantage and one disadvantage of using multiple plates in a friction clutch system?
What is one advantage and one disadvantage of using multiple plates in a friction clutch system?
Questions and Answers
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Flashcards
Flashcards
Microbial Contamination
Microbial Contamination
The presence of microorganisms in diesel engine fuel.
Problems from Microbial Contamination
Problems from Microbial Contamination
Fuel filter blockages, fuel pump failure, and injector fouling.
Avoiding Microbial Contamination
Avoiding Microbial Contamination
Using fuel additives, storing fuel in clean tanks, and regularly testing fuel.
Functions of Lubricating Oil
Functions of Lubricating Oil
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Hydrostatic Lubrication
Hydrostatic Lubrication
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Boundary Lubrication
Boundary Lubrication
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Purpose of Corrugated Plates
Purpose of Corrugated Plates
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Purpose of Tell-tales
Purpose of Tell-tales
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Causes of Low Lubricating Oil Pressure
Causes of Low Lubricating Oil Pressure
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Remedies for Low Lubricating Oil Pressure
Remedies for Low Lubricating Oil Pressure
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Causes of Engine Overheating
Causes of Engine Overheating
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Remedies for Engine Overheating
Remedies for Engine Overheating
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Causes of Unstable Engine Speed
Causes of Unstable Engine Speed
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Remedies for Unstable Engine Speed
Remedies for Unstable Engine Speed
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Advantages of Wet Clutches
Advantages of Wet Clutches
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Disadvantages of Wet Clutches
Disadvantages of Wet Clutches
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Advantage of Multiple Clutch Plates
Advantage of Multiple Clutch Plates
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Disadvantages of Multiple Clutch Plates
Disadvantages of Multiple Clutch Plates
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Flashcards
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Study Notes
Study Notes
Diesel Engine Fuel
- Microbial contamination refers to the presence of microorganisms in diesel engine fuel.
- Microbial contamination can cause problems such as:
- Fuel filter blockages
- Fuel pump failure
- Injector fouling
- Microbial contamination can be avoided by:
- Using fuel additives that inhibit microbial growth
- Storing fuel in clean, dry tanks
- Regularly testing fuel for microbiological activity
Lubricating Oil
- Functions of lubricating oil:
- Reduces friction between moving parts
- Cools engine components
- Prevents corrosion
- Carries away contaminants
- Hydrostatic lubrication: a type of lubrication where a thin film of lubricant is maintained between moving parts.
- Boundary lubrication: a type of lubrication where the lubricant forms a thin film between moving parts, but does not completely separate them.
Plate Type Heat Exchangers
- Assembly:
- Plates are corrugated to increase heat transfer area
- Plates and seals are typically made of stainless steel or titanium
- Purpose of corrugated plates: to increase heat transfer area
- Purpose of tell-tales: to indicate fluid flow
Diesel Engine Faults
- Low lubricating oil pressure:
- Causes: worn engine bearings, low oil viscosity, oil pump failure
- Remedies: check oil level, replace engine bearings, replace oil pump
- Overheating:
- Causes: coolant leaks, radiator blockages, thermostat failure
- Remedies: check coolant level, clean radiator, replace thermostat
- Unstable speed:
- Causes: faulty fuel injectors, governor malfunction, turbolag
- Remedies: clean or replace fuel injectors, adjust or replace governor, check turbine performance
Friction Clutches
- Advantages of wet clutches:
- Can dissipate heat quickly
- Can handle high torque loads
- Are resistant to wear
- Disadvantages of wet clutches:
- Require regular maintenance
- Can be noisy
- Require a high-pressure oil system
- Advantage of multiple plates: increased friction surface area
- Disadvantages of multiple plates:
- Increased weight
- Increased complexity
- Increased cost
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