KCSE 2015 Aviation Paper 2 with Marking Scheme

STATION 1
INSTRUCTIONS
Figure 1 shows a pictorial drawing of a hydraulic system component.

On the A3, drawing paper provided:

1. Sketch in good proportion of the cross section of the component.
2. Identify the component.
3. Label six main parts of the component. (10 marks)

STATION 2
INSTRUCTIONS
Using the template, tools, and materials provided, make the aircraft ram air scoop shown in figure 2. (10 marks)

STATION 3
INSTRUCTIONS
Using the tools and materials provided, carry out the following tasks:

1.    
   1. Scribe each of the materials labeled A, B and C. Record your observations. (1 marks)
   2. Centre punch each material in a(i). Record your observations. (1, marks)
   3. File each of the materials in a(i). Record your observations. (1} marks)
   4. Bend each of the materials in a(i) to 90°. Record your observations. (1 marks)
2. From the observations (1) - (iv), comment on the hardness of each material. (1, marks)
3. Identify the materials labelled A and C. (1 mark)
4. State where each of the materials in a(i) can be used on an aircraft. (1, marks)

SECTION 4
INSTRUCTIONS

1. Figure 3 shows a sectional view of an aircraft pulley provided.
   
   Using the tools, measure and record the dimensions A-H as shown in the figure. (8 marks)
2. Identify the function of the part painted red on the pulley.
3. State two rejection criteria and one maintenance aspect of the pulley.
   
   1. Rejection criteria (1 mark)
   2. Maintenance aspect

STATION 5
INSTRUCTIONS
Study the set up provided and perform the following tasks:

1.      
   1. Pour 300 ml of water at point A. Record the amount collected in beaker A1.
      Amount of water .........
   2. Repeat a(i) at B. Record the amount of water collected in beaker B1.
      Amount of water .............
   3. Repeat a(i) at C. Record the amount of water collected in beaker Ci.
      Amount of water ............. (6 marks)
2. State the reasons for your observations in a(i), (ii) and (iii)
   Observation in (i), (ii) and (iii) (12 marks)
3. Relate your observation in (b) to an aircraft in flight.
   Relationship in b(i), (ii) and (iii) (1, marks)
4. State two overall effects of using body ‘A’on an aircraft effects (1 mark)

STATION 6
INSTRUCTIONS
Using the tools and materials provided, carry out the following tasks.

1. Identify the materials labelled 'X' and 'Y' (1 mark)
2. Strip one end of material labelled “X' and name the parts. (2 marks)
3.    
   1. Tin the stripped end of material labelled 'X'.
   2. Clip the male and female connectors on the material labelled 'Y'. (7 marks)

STATION 7
INSTRUCTIONS
Using the tools, wheel assembly and brake assembly provided, carry out the following

1. On the whole assembly
   
   1. Check the tyre pressure.
      Pressure ... (1 mark)
   2. Torque load the nut painted red to 60 450 lbs. Let the examiner check your work. (1 mark)
   3. Identify the tyre size and ply rating.
      Size .............
      Ply rating .... (1 mark)
   4. Identify and record two rejection criteria.
      Criteria (1) (1 mark)
   5. State the purpose of the blue and white marks.
      Blue
      ....................................
      White ............ (1 mark)
2. Safely wire the bolts on the brake assembly. (5 marks)

STATION 8
INSTRUCTIONS
Using the tools and the engine components provided, carry out the following tasks:

1.    
   1. Identify the components labelled M and N.
   2. Measure and record the gap of the component labelled N.
      Gap
      ........ (2 marks)
2.    
   1. Remove the cap on the component M. Let the examiner check your work.
   2. Identify the parts painted white and yellow.
      White
      .........
      Yellow ...........
   3. State the condition of distribution points.
   4. Replace the cap. Let the examiner check your work. (4 marks)
3.    
   1. Fit the leads on the component marked M to match the best firing order. Let the examiner check your work.
   2. State two rejection criteria of the part labelled P.
   3. State two functions of the part painted blue on component M. (4 marks)

STATION 9
INSTRUCTIONS
Study aircraft instruments marked 1 to 9 and carry out the following tasks. (6 marks)

1. Group the instruments into three major categories and complete the table below.
   

   GROUP NAME	RELATED INSTRUMENTS
   1.	(i) (ii) (iii)
   2.	(i) (ii) (iii)
   3.	(i) (ii) (iii)

2. State the reasons for each grouping in (a).
   GROUP       REASON (13 marks)
3. Name three settings made on instrument labelled 10. (1, marks)
4. Name one common error and maintenance task for instruments labelled 1 to 9. (1 mark)
   Error ...........
   Maintenance task .....

STATION 10
INSTRUCTIONS

1. Demonstrate to the examiner six marshalling signals from starting to taxing out on a twinned engine aircraft. (3 marks)
2. Identify and state the use of areas labelled A, B, C, D and E. (5 marks)
   AREA NAME         USE
3.      
   1. State the name of runway and the direction of take off/landing.
      Runway
      Direction
   2. Give the functions of G and H. (2 marks)