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CSEE 🇹🇿 NECTA ✓ Official NECTA answers

Agriculture · Paper 2 · 2022

3 questions

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Questions (3)

Section A

1. 0 marks

Procedures (i) Strap specimen G in the back in a comfortable position. (ii) Use the handle to pump up and down until it becomes hard to do so, then stop. (iii) Direct the lance into the bucket provided. (iv) Press the trigger control to release the content in the tank into the bucket and observe its flow for one minute. (v) Unstrap the specimen.

(i) Briefly describe the purpose of doing procedure (ii). 2 mk
(a) What caused the bubbles to come out? 3 mk
(b) Why did you stir the mixture for bubbles to come out? 3 mk
(ii) Assume you are spraying pesticide on crops in the field (procedure (iv)), outline three important safety precautions would you have to consider. 3 mk
(c) Comment with reason on the volume of the mixture before and after shaking and stirring in both cylinders. 5 mk
(iii) How would you care for and maintain part of specimen G that disperses liquid spray into the spray area? Give six points. 6 mk
(iv) Compare the volume of bubbles lost in soil samples A and B. Give reasons to support your answers. 5 mk
(d) Compare the volume of bubbles lost in soil samples A and B. Give reasons to support your answers. 7 mk
(e) State the relationship between bubbles that have been lost in the experiment and water in the soil. 3 mk
(v) State the relationship between bubbles that have been lost in the experiment and water in the soil. 2 mk
(f) What conclusion can you draw from the experiment you have done? 4 mk
(vi) What conclusion can you draw from the experiment you have done? 4 mk

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Section B

2. 25 marks

You are provided with specimen G filled with water and bucket. Perform the following procedures and answer the questions that follows:

(i) Briefly describe the purpose of doing procedure (ii). 2 mk
(ii) Assume you are spraying pesticide on crops in the field (procedure (iv)), outline three important safety precautions would you have to consider. 6 mk
(iii) How would you care for and maintain part of specimen G that disperses liquid spray into the spray area? Give six points . 12 mk

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