Kenya Certificate Of Secondary Education(KCSE 2013) Aviation Technology Paper 2

STATION 1
Figure 1 shows a pictorial view of a hydraulic system paper filter.
On the drawing paper provided:

1. Sketch in good proportion the exploded view of the filter. (8 marks)
2. Name four parts. (2 marks)
   

STATION 2
Using the tools, equipment and materials provided, make an overlap patch as shown in Figure 2. (10 marks)

STATION 3
Using the tools and the connecting rod parts provided, carry out the following tasks:

1. Measure and record the following:
   
   1. inside diameter of the small end;
   2. roundness of the Gudgeon pin;
   3. pitch of the cap bolt;
   4. width of the cap bearing. (4 marks)
2. Identify two rejection criteria for the nut. (2 marks)
3. State the function of the two design features painted red and blue on the cap bearing.
   Red .................................................................................................................................
   Blue .................................................................................................................................
4. Give two inspection checks carried out on the connecting rod assembly.
   
   1. .................................................................................................................................
   2. .................................................................................................................................
5. Identify and state the function of the piston rings labelled X and Y.
   X .................................................................................................................................
   Y ................................................................................................................................. (2 marks)

STATION 4

1. Using the materials provided, make and label the aircraft wing plan forms to suit each of the following flow regimes:
   1. subsonic;
   2. hypersonic, (6 marks)
2. On the subsonic plan form, determine and show its:
   
   1. surface area; (2 marks)
   2. aspect ratio. (2 marks)

STATION 5

1. Identify the materials labelled A, B, C and D and state where each is used in the aircraft.
                                      NAME                                     WHERE USED
   A __________________________________ ____________________________________
   B __________________________________ ____________________________________
   C __________________________________ ____________________________________
   D __________________________________ ____________________________________
2. Using the materials provided, demonstrate to the examiner the correct procedure of carrying out the dye penetrant test on the part labelled P. (6 marks)

STATION 6

1. Using the tools and equipment provided, carry out the tabulated tests on the materials labelled P and Q and record your observations in the table. (8 marks)
   

   Test	Material P	Material Q
   Breaking
   Cutting
   Burning
   Bending

2. Identify the materials P and Q and state one application of each in an aircraft. (2 marks)
   P
   Application
   Q
   Application

STATION 7

1. Study the instrument labelled X and identify the following:
   
   1. principle of operation of the instrument;
   2. aircraft system used;
   3. starting requirement.
2. Using the pump and instrument assemblies labelled Y, W and Z, carry out the following
   1. connect the pump to the instrument labelled Y, pump slowly and state: ( 1 2 mark)
      
      1. your observation;
      2. the reason behind your observation;
      3. one application in an aircraft. (2 marks)
   2. Repeat b(i) above with instrument labelled W. (2 marks)
   3. Repeat b(i) above with instrument labelled Z. (2 marks)
3. For the instruments labelled Y, W and Z state:
   
   1. the principle of operation;
   2. two maintenance tasks. (2 marks)

STATION 8
Using the tools, equipment and materials provided, carry out the following tasks:

1. strip one end of the cable provided to expose about 5mm of each layer.
   Let the examiner check your work. (2 marks)
2.    
   1. Identify the type of cable;
   2. State one application in an aircraft;
   3. Sketch and label the four layers. (4 marks)
3. Solder the connector provided to the other end of the cable. Let the examiner check your work. (4 marks)

STATION 9
Using the tools provided, carry out the following tasks:

1. Remove the spark plug from the aeropiston cylinder provided and:
   1. measure and record the size of the gap; (1 mark)
   2. state the condition of the gap;
   3. state the function of the gap. (3 marks)
      Replace the spark plug and let the examiner check your work.
2. Identify the parts marked A and B. (1 mark)
   A ..................................................................................................................................
   B ..................................................................................................................................
3. Study the spark plug hole marked H and:
   
   1. identify the defect;
   2. state the repair method for the defect. (2 marks)
4. Remove the tappet cover and list four missing parts: (2 marks)
   
   1. .......................................................................
   2. .......................................................................
   3. .......................................................................
   4. ......................................................................
5. Replace the tappet cover and let the examiner check your work. (1 mark)

STATION 10

1. State the system in which each of the aircraft parts labelled L, M and N is used.
   L ........................................................................................................
   M ........................................................................................................
   N .........................................................................................................
2. Identify the aircraft components labelled P, Q and R and complete the table below:
   

   COMPONET	NAME	APPLICATION	MAINTENANCE REQUIRED
   P
   Q
   R

3. Study the components labelled S, T, U and V and state one reason for discarding. (4 marks)
   

   COMPONENT	NAME	REASON FOR DISCARDING
   S
   T
   U
   V