(a) Describe TWO methods of cylinder liner lubrication in medium speed diesel engines.(6)
(b) Describe the possible effects of EACH of the following:
(i) insufficient lubrication;(2)
(ii) excessive lubrication.(2)
MDE Unit 10 Q1 MDE Unit 10 Q1 Quiz
(a) State FOUR functions of lubricating oil.(4)
(b) Explain EACH of the following terms:
(i) hydrostatic lubrication;(2)
(ii) boundary lubrication.(2)
(c) State ONE advantage and ONE disadvantage of using grease as a lubricant in a plain bearing.(2)
MDE Unit 10 Q2 MDE Unit 10 Q2 Quiz
With reference to diesel engine lubricating oil:
(a) state the main functions;(6)
(b) list FOUR contaminants that may be identified from laboratory analysis of a lubricating oil sample, stating their effects on the engine.(4)
MDE Unit 10 Q3 MDE Unit 10 Q3 Quiz
Describe, with reasons, FIVE properties required of lubricating oil.
(10)
MDE Unit 10 Q4 MDE Unit 10 Q4 Quiz
With reference to a gearbox:
(a) explain why large quantities of lubricating oil are used;(2)
(b) state FOUR possible causes of excessive lubricating oil temperature when at normal operating speeds;(4)
(c) state how EACH cause stated in part (b) may be remedied.(4)
MDE Unit 10 Q5 MDE Unit 10 Q5 Quiz
With reference to diesel engine lubricating oil:
(a) explain how the oil may become contaminated during service;(5)
(b) describe how to keep the oil in a satisfactory condition.(5)
MDE Unit 10 Q6 MDE Unit 10 Q6 Quiz
(a) Explain what is meant by microbial degradation of a lubricating oil.(4)
(b) State FOUR indications that could be observed if a lubricating oil was suffering from microbial degradation.(4)
(c) Describe TWO actions that should be taken on detecting the early start of microbial degradation of the main engine lubricating oil.(2)