You are provided with specimens: A1, A2, A3, B1, B2, B3, B4, B5, C1, C2, C3, C4, and C5. (a) (i) Identify specimens A1, A2, and A3 (ii) State two main types of specimen A1 and their functions (iii) Outline three operational faults that would indicate specimen A1 is damaged (iv) Mention the unit of a tractor transmission system in which specimen A3 is used and explain its working principle (b) (i) Identify specimens B3, B4, and B5 (ii) Describe the use of specimens B1, B2, and B5 (iii) Differentiate between the functions of specimen B3 and B4 (c) (i) Identify specimens C1, C2, C3, and C4 (ii) Show their correct arrangement and name the fitting used when joining specimen C5

1. Mention the unit of a tractor transmission system in which specimen A3 is used and explain its working principle (4 mk)
2. Differentiate between the functions of specimen B3 and B4 (3 mk)
3. Show their correct arrangement and name the fitting used when joining specimen C5 (3 mk)

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You are provided with specimens: D1, D2, E1, E2, and E3. (a) (i) Identify specimens D1 and D2 (ii) Outline four unique features of specimen D2 (iii) State the use of specimens D1 and D2 (iv) Mention the stage of crop growth when specimen D2 is recommended for application (b) (i) Identify specimen E1 by its botanical name (ii) State the disease on specimen E1 and its causative agent (iii) Identify the disease on specimen E2 (iv) List two methods of transmission of the disease in specimen E2 (v) Give the scientific name of specimen E3 (vi) Mention three crops mainly attacked by specimen E3 (vii) Suggest whether specimen E3 is a storage or field pest, giving two reasons

1. Mention the stage of crop growth when specimen D2 is recommended for application (2 mk)
2. List two methods of transmission of the disease in specimen E2 (2 mk)
3. Suggest whether specimen E3 is a storage or field pest, giving two reasons (3 mk)

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You are provided with specimens: F1, F2, F3, and F4. (a) (i) Identify specimens F1, F2, F3, and F4 by their scientific names (ii) Describe how specimens F1 and F2 may be preserved effectively (iii) Give three reasons farmers conserve specimens F1 and F2 (b) (i) Explain how farm animals can be infested by specimen F4 (ii) Mention two livestock species that are common hosts of specimen F4 (iii) Explain the biological relationship between specimen F3 and F4 (iv) Outline three ways of controlling specimen F4 on livestock

1. Give three reasons farmers conserve specimens F1 and F2 (3 mk)
2. Outline three ways of controlling specimen F4 on livestock (3 mk)

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