(a) Describe a gearbox inspection. (6)
(b) State, with reasons, TWO gear tooth faults. (4)
MDE Unit 20 Q1 MDE Unit 20 Q1 Quiz
With reference to main reduction gearing:
(a) explain why lubricating oil should be supplied before the gearing rotates:(4)
(b) state the condition monitoring techniques that may be employed to assess the condition of the gearing.(6)
MDE Unit 20 Q2 MDE Unit 20 Q2 Quiz
With reference to reduction gears, state the advantages and disadvantages of EACH of the following:
(a) helical teeth compared with spur teeth;(5)
(b) double helix compared to single helix.(5)
MDE Unit 20 Q3 MDE Unit 20 Q3 Quiz
With reference to reduction gearing, explain EACH of the following:
(a) the purpose of the magnetic filter in the lubricating oil system;(3)
(b) why the surface finish of the gear teeth is important;(4)
(c) why EP lubricating oil is preferred.(3)
MDE Unit 20 Q4 MDE Unit 20 Q4 Quiz
Describe, with the aid of a sketch, an epicyclic planetary reduction gear.
(10)
MDE Unit 20 Q5 Quiz
(a) State how gearbox oil may become contaminated with water.(1)
(b) Explain the effects of water contamination of gearbox oil.(5)
(c) Describe the actions to be taken should a gearbox become contaminated with water.(4)
MDE Unit 20 Q6 MDE Unit 20 Q6 Quiz
(a) Sketch a block diagram of a lubricating oil system suitable for use with a reduction gearing, including all the protective devices.(5)
(b) State the engineering purpose/function of EACH item in the system sketched in part(a).(5)
MDE Unit 20 Q7 MDE Unit 20 Q7 Quiz
Explain why main reduction gearing uses oil sprayers for lubrication rather than rely on a wet sump and the gearing picking up oil as it rotates.(10)