Instructions To Candidates
- There are TEN stations in this examination.
- Candidates are allowed 15 MINUTES at each station.
- Candidates are NOT allowed to either review the previous station’s work or read instructions for other stations.
- Write your NAME and INDEX NUMBER on all projects.
- Attempt ALL exercises in each station.
- All dimensions are in millimeters unless otherwise stated
Questions
STATION 1
INSTRUCTIONS
The figure below shows parts of a valve operating mechanism of aeropiston engine. On the drawing paper provided:
- Sketch in good proportion an assembled unit vertically.
- Name at least FIVE parts on the assembled units. [10 marks]
STATION 2
INSTRUCTIONS
Using the tools, equipment and material provides, make the exhaust Cone as shown in the drawing below. [10 marks]
STATION 3
INSTRUCTIONS
Identify each of the aircraft hardware numbered and state one use for each. [10 marks]
HARDWARE | USE | |
1 | ______________________ | ______________________ |
2 | ______________________ | ______________________ |
3 | ______________________ | ______________________ |
4 | ______________________ | ______________________ |
5 | ______________________ | ______________________ |
STATION 4
INSTRUCTIONS
Study the two aircraft models carefully and answer the questions that follow:-
- Classify the two types of aircraft represented by the models and in each case give an example of such an aircraft. [4 marks]
- State the operational difference of the two types of aircraft with regards to the following:- [4marks]
- Landing
A
B - Take-off
A
B - Parking Configuration
A
B - Main undercarriage
A
B
- Landing
- Explain why design A is not commonly used. [2 marks]
STATION 5
INSTRUCTIONS
- Place the spring provided between the vice jaws endwise.
Tighten the vice and observe what happens to the spring.- State the type of load the spring is subjected to:
- State the loading effect on the spring.
- Relate this loading to an aircraft structure. [4 marks]
- Clamp the marked end of the metal plate provided between the vice jaws. Push the
plate at the point marked A and observe what happens.- State the two types of load the metal plate is subjected to.
- State the loading effect on the metal plate.
- Relate these loadings to aircraft primary control surface. [6 marks]
STATION 6
INSTRUCTIONS
- Roll the ball from the bottom of the concave surface of the basin provided.
- State what happens to the ball. [1 mark]
- Explain the relevance of this experiment to an aeroplane in flight. [2 marks]
- Roll the ball from the top of the convex surface of the basin
- State what happens to the ball. [1mark]
- Explain the relevance of the experiment to an aeroplane in flight. [2 marks]
- Roll the ball on the flat surface provided (table)
- State what happens to the ball. [1 mark]
- Explain the relevance of this experiment to an aeroplane in flight. [2 marks]
- State which of the above situations (a), (b) and (c) is best suited for an aeroplane in flight. [1 mark]
STATION 7
INSTRUCTIONS
- Replace the turn buckle provided and wire lock. Let the examiner check your work.
- Name the tool (s) suitable for use the exercise. [10 marks]
STATION 8
INSTRUCTIONS
Connect the components provided as shown in the circuit diagram below. Let the examiner check your work. [4 ½ marks]
- Select switch S1 to the ON position and measure the value of the current flowing through bulb B,
Current: ______________________ [1 mark] - With switch S1 in OFF position, measure the value of resistor R1. [1 mark]
- Select switch S1 and S2 to the ON position and explain what happens to bulbs B1 and B2.[2 marks]
- Measure the total circuit resistance.[1 mark]
- State one application of the circuit in an aircraft. [½ mark]
STATION 9
INSTRUCTIONS
- Mask the paper on the table in horizontal position.
- Let it flap down on the other end.
Blow air over the paper.
- Make your observation [2 marks]
- State the principle behind this experiment. [2 marks]
- Relate the principle (b) above to an aircraft.[6 marks]
STATION 10
INSTRUCTIONS
Study the set up below and answer the questions that follow:
-
- State the observation made before and after the fire cracker is lit.
Observation:-
Before
After [2 marks] - State the scientific law that is associated with the observation made in a (i) above. [2 marks]
- State the observation made before and after the fire cracker is lit.
-
- State why the experiment can only be successful in the innermost and not in the outer space. [1 mark]
- Name a type of an aircraft that has a mechanism to overcome the condition in b (i) above. [1 mark]
- Outline two safety measures you would take to ensure the experiment is successful. [2 marks]
- What is the relevance of this experiment in aviation? [2 marks]
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