Match the fluid mechanics measurements in List A with the corresponding measuring instruments in List B by writing the letter of the correct answer in the table provided. LIST A i) Measures the pressure of a gas ii) Measures relative density of liquid iii) Measures the atmospheric pressure iv) Measures the gauge pressure v) Measures the difference between the absolute pressure and atmospheric pressure LIST B A. A Barometer B. Bourdon gauge C. Pressure gauge D. Hydrometer E. Hygrometer F. Manometer G. Thermometer H. Thermostat

1. Measures the pressure of a gas (1 alama)
2. Measures relative density of liquid (1 alama)
3. Measures the atmospheric pressure (1 alama)
4. Measures the gauge pressure (1 alama)
5. Measures the difference between the absolute pressure and atmospheric pressure (1 alama)

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Match the fluid mechanics measurements in List A with the corresponding measuring instruments in List B by writing the letter of the correct answer in the table provided. LIST A LIST B i) Measures the pressure of a gas A. A Barometer B. Bourdon gauge ii) Measures relative density of liquid C. Pressure gauge iii) Measures the atmospheric pressure D. Hydrometer iv) Measures the gauge pressure E. Hygrometer v) Measures the difference between the absolute pressure and atmospheric pressure F. Manometer G. Thermometer H. Thermostat List A (i) (ii) (iii) (iv) (v) List B

1. Measures the pressure of a gas (1 alama)
2. Measures relative density of liquid (1 alama)
3. Measures the atmospheric pressure (1 alama)
4. Measures the gauge pressure (1 alama)
5. Measures the difference between the absolute pressure and atmospheric pressure (1 alama)

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When a body travels in a straight line with an initial velocity ‘u’ m/s accelerates uniformly by ‘a’ m/s2 until it reaches a final velocity of ‘v’ m/s at a time ‘t’ and cover a distance ‘s’. Prove that s = ut + ½at².

1. Prove that s = ut + ½at². (0 alama)

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A uniform scaffold plank 6 m long and weight 100 N rests on supports at B and C as shown in the figure below. A man of weight 700 N stands 2 m from end A where there is a hanged weight of 50 N. What additional weight at A would make the plank just tilt about B thus endangering the safety of the man?

1. Calculate the reaction X and Y at the supports. (0 alama)
2. What additional weight at A would make the plank just tilt about B thus endangering the safety of the man? (0 alama)

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A group of students was assigned to put a load of 5000 N into the vehicle at a height of 2m above the ground by using an inclined plane. The efforts required to haul the load was 50N. The students were required to select inclined plane to be used for a job with lengths 5m or 7m respectively. Which inclined plane would you advise the students to use with consideration to their efficient?

1. Which inclined plane would you advise the students to use with consideration to their efficient? (0 alama)

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(b) You are given an iron tyre of diameter 50cm at 15°C to shrink it on a wheel of diameter 50.35cm. To what temperature will you heat the tyre so that it will slip over the wheel with a radial gap of 0.5mm? (Linear expansivity of iron is 0.000012/K).

1. How would you differentiate the increment between both scenarios? (0 alama)
2. To what temperature will you heat the tyre so that it will slip over the wheel with a radial gap of 0.5mm? (0 alama)

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(a) A Coca Cola company experiences an excessive consumption of electrical power due to various frictions developed on the mechanical drives. What are the four laws which both static friction and kinetic friction depend on? (i) .................................................................................................................. (ii) ................................................................................................................. (iii) .............................................................................................................. (iv) .............................................................................................................. (b) The figure below shows a box of 20 kg, which is pushed by a student on a horizontal surface by using a force of 118N. Calculate the coefficient of friction between the two surfaces in contact.

1. What are the four laws which both static friction and kinetic friction depend on? (4 alama)
2. A box of 20 kg is pushed by a student on a horizontal surface by using a force of 118N. Calculate the coefficient of friction between the two surfaces in contact. (6 alama)

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Two cells each having an e.m.f of 1.5V and internal resistance of 2Ω were connected in series and then in parallel. a) Find the current in each case when the cells are connected to a 1Ω resistor. b) If the 1Ω resistor is substituted by an 11Ω resistor, calculate the new current in both cases. c) Advise a better connection for 1Ω and 11Ω resistors.

1. Find the current in each case when the cells are connected to a 1Ω resistor. (0 alama)
2. Find the current in each case when the cells are connected to a 1Ω resistor. (5 alama)
3. If the 1Ω resistor is substituted by an 11Ω resistor, calculate the new current in both cases. (5 alama)
4. If the 1Ω resistor is substituted by an 11Ω resistor, calculate the new current in both cases. (0 alama)
5. Advise a better connection for 1Ω and 11Ω resistors. (0 alama)
6. Advise a better connection for 1Ω and 11Ω resistors. (5 alama)

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