30. The diagram in Fig. 4.12 shows a device which makes use of the principle of transmission of pressure.FIXED SUPPORTLEVERХCYLINDERCYLINDER PRELEASEVALVEVALVE AVALVEBCONNECTOREWATER SUPPLYTANKFig. 4.12(i) Name the parts labelled by the letters X and Y.(ii) Describe what happens to the valves A and B andto the quantity of water in the two cylinders whenthe lever arm is moved down.(iii) Give reasons for what happens to the valves Aand B in part (ii).(iv) What happens when the release valve isopened?(v) What happens to the valve B in cylinder P whenthe lever arm is moved up?(vi) Give a reason for your answer in part (v).(vii) State one use of the above device.

30. The diagram in Fig. 4.12 shows a device which makes use of the p

1.	30. The diagram in Fig. 4.12 shows a device which makes use of the principle of transmission of pressure.FIXED SUPPORTLEVERХCYLINDERCYLINDER PRELEASEVALVEVALVE AVALVEBCONNECTOREWATER SUPPLYTANKFig. 4.12(i) Name the parts labelled by the letters X and Y.(ii) Describe what happens to the valves A and B andto the quantity of water in the two cylinders whenthe lever arm is moved down.(iii) Give reasons for what happens to the valves Aand B in part (ii).(iv) What happens when the release valve isopened?(v) What happens to the valve B in cylinder P whenthe lever arm is moved up?(vi) Give a reason for your answer in part (v).(vii) State one use of the above device.
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