Match the electrical parameters in list A with their corresponding components in list B by writing the letter correct response beside the number in the table provided. LIST A i) It allows electric current to pass through human body and metals. ii) It prevents serious electrical shocks iii) It prevents the quantity of electricity. iv) It is a pontential difference between two points. v) It prevents over loading of electric circuit. LIST B A. An electric lamp B. Conductors C. Coulomb D. Earth rod E. Electric current F. Fuse G. Ressistance

1. It allows electric current to pass through human body and metals. (1 mk)
2. It allows electric current to pass through human body and metals. (1 mk)
3. It prevents serious electrical shocks (1 mk)
4. It prevents serious electrical shocks (1 mk)
5. It prevents the quantity of electricity. (1 mk)
6. It prevents the quantity of electricity. (1 mk)
7. It is a pontential difference between two points. (1 mk)
8. It is a potential difference between two points. (1 mk)
9. It prevents over loading of electric circuit. (1 mk)
10. It prevents over loading of electric circuit. (1 mk)

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A uniform beam 4m long, is simply supported at two points A and B. Points A is 0.5m from left-hands ends and the point B is 1.5m from the right_hand end. The beam carries load of 600N at the lefts end, 800N at its centre and 400N at the right end. Determine the magnitude of the support reactions at A and B.

1. Determine the magnitude of the support reactions at A and B. (10 mk)

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In a sugar industry the copper tubes of the boiler are 4.2m long at a temperature of 20 C. Determine the length of the tube when: (a) Surrounded only by feed water at 10 C. (b) The boiler is operating and the mean temperature of the tubes rises to 320 C. Assume the coefficient of linear of expansion of copper to be 17x10^-6 K.

1. Surrounded only by feed water at 10 C. (5 mk)
2. The boiler is operating and the mean temperature of the tubes rises to 320 C. Assume the coefficient of linear of expansion of copper to be 17x10^-6 K. (5 mk)

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The lighting gear on a vehicle body is situated 3m from the pivot. If the body contains two loads of 15kN and 7.5 Kn whose centres of gravity are 0.8m and 2m respectively from the pivot. Calculate the effort required from the gear to raise the body.

1. (0 mk)
2. Why is reccommended to use a spanner of longer stem to loosen a nut on a bolt? (0 mk)
3. The lighting gear on a vehicle body is situated 3m from the pivot. If the body contains two loads of 15kN and 7.5 Kn whose centres of gravity are 0.8m and 2m required from the gear to raise the body. (0 mk)

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A simple machine raises a load of 120 kg through a distance of 1.2m. The effort applied in the machine is 150N and it moves through a distance of 12m. Determine: a) The mechanical advantage. b) Velocity ratio. c) The efficiency of the machine.

1. The mechanical advantage. (0 mk)
2. The mechanical advantage. (2 mk)
3. Describe the motion of the car during the first 10 seconds and from 20 to 30 seconds. (1 mk)
4. Velocity ratio. (0 mk)
5. Velocity ratio. (2 mk)
6. The efficiency of the machine. (0 mk)
7. The efficiency of the machine. (2 mk)

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A student performed an experiment to measure the density of a solid with an irregular shape by means of measuring cylinder and recorded the results as follows: Mass of an irregular solid, m=178g. Initial volume of water in the measuring cylinder, V1 = 80cm³. Final volume of water in the measuring cylinder, V2 = 80cm³. (a) Draw a net sketch diagram to show the levels of water in the measuring cylinder: (i) Before the solid is immersed. (ii) After the solid is immersed. (b) Formulate an equation to find the difference in volume V in terms of V1 and V2. (c) Use the equation you have formed in (b) to find the volume of the irregular solid.

1. Draw a net sketch diagram to show the levels of water in the measuring cylinder: (i) Before the solid is immersed. (ii) After the solid is immersed. (2 mk)
2. Draw a net sketch diagram to show the levels of water in the measuring (0 mk)
3. Formulate an equation to find the difference in volume V in terms of V1 and V2. (1 mk)
4. Use the equation you have formed in (b) to find the volume of the irregular solid. (2 mk)

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Determine the length of the tube when:

1. Surrounded only by feed water at 10°C. (0 mk)
2. The boiler is operating and the mean temperature of the tubes rises to 320°C. Assume the coefficient of linear of expansion of copper to be 17x10⁻⁶ K⁻¹. (0 mk)

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The bus started for rest and in 30 seconds reached a speed of 20m/s. The speed remained steady for 15 second and decrease steadily until the bus stopped in 5 second later. (a) Draw a velocity time graph. (b) Use the diagram in (a) to calculate; (i) The distance covered from start to end of the journey. (ii) The acceleration during the motion

1. Draw a velocity time graph. (1 mk)
2. Use the diagram in (a) to calculate: (1 mk)
3. The distance covered from start to end of the journey. (1 mk)
4. The acceleration during the motion (1 mk)

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