B.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Aircraft Maintenance Science
PISTON ENGINE AND PROPELLER
(Upto 2015 batch)
Time 3 Hours Maximum 75 Marks
Part A x 3 15)
Answer any five questions.
1. Differentiate Valve lead and valve lag.
2. Define firing order and write the sequence of 12 cylinder
of radial engine.
3. What do you understand by heat range of spark plug?
4. Write the requirements of lubricating oil used in engine
lubrication system?
5. Write the basic characteristics of fuel used in aviation.
6. What is Ignition Harness?
7. What is direct type starter?
8. Write the importance of wooden propeller.
Part B x 12 60)
Answer all questions.
9. Describe four stroke fire events of petrol engine
cycle with P.V diagram?
Or
Write short notes on:
Brake Horse Power
Indicated Horse Power
Thermal Efficiency
Crank shaft.
Sub. Code
41
CP-7818
2
Sp 1
10. Write down the constructional details of various
types of pistons.
Or
Draw an external type supercharger system and
explain.
11. Describe float type carburetor and its components
with diagram.
Or
Explain the operation of dry sump lubrication
system of reciprocating engine.
12. Explain the construction of a spark plug in detail.
Or
Explain about the engine Starter motor.
13. Explain in detail about various types of propellers.
Or
Describe the fixed and variable pitch propeller.
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