3764 K2 Trial 2007

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SULIT

3764/2 Section A Bahagian A Answer any one question [20 marks] Jawab mana-mana satu soalan [20 markah]

1

Figure 1(a) shows a part of the blow moulding process to produce a plastic bottle as shown in figure 1(b). Rajah 1(a) menunjukkan sebahagian proses pengacuan tiup untuk menghasilkan botol plastik seperti ditunujkkan dalam rajah 1(b). a) Name the type of thermoplastic that can be used to produce the plastic bottle. Namakan jenis plastic haba yang boleh digunakan untuk menghasilkan botol plastik itu. [ 2 marks ] b) With the aid of sketches, describe the steps of the blow moulding process to produce the plastic bottle. Dengan bantuan lakaran, huraikan langkah-langkah proses pengacuan tiup untuk menghasilkan botol plastik. [ 12 marks ] c) List two advantages and one disadvantage of blow moulding process. Senaraikan dua kelebihan dan satu kelemahan process pengacuan tiup. [ 6 marks ]

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FIGURE 2 2. Figure 2 shows a template, which is made from a130 mm X 60 mm X 6 mm mild steel plate. With the aid of sketches, Dengan bantuan lakaran, a) List the steps to mark the hollow part of the template. Senaraikan langkah-langkah untuk menanda bahagian templat yang berlubang. [6 marks] b) List the steps to produce the hole part of the template. Senaraikan langkah-langkah untuk menghasilkan bahagian berlubang templat itu. [14 marks]

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3764/2 Section B Bahagian B Answer any one question [20 marks] Jawab mana-mana satu soalan [20 markah]

FIGURE 3 3. Figure 3 shows a part of hydraulic system that is used to lift the load. The cross sectional areas of P is 0.7 m² and Q is 0.5 m² Rajah 4 menunjukkan satubahagian sistem hidraulik yang digunakan untuk mengangkat beban. Luas keratan rentas P ialah 0.7 m² dan Q ialah 0.5 m².

a) i). Calculate the force at P and the work done if the distance R is 3cm Hitungkan daya pada P dan kerja yang dihasilkan jika jarak R ialah 3cm. [ 8 marks ] ii). If the time taken for the piston rod to move upward in the cylinder Q is 0.8 minute, calculate the value of power used. Jika masa yang diambil oleh rod omboh naik didalam selinder Q ialah 0.8 minit, hitungkan nilai kuasa yang digunakan. [4 marks ] iii). Calculate the total pressure in the cylinder if the original force decreases by 10%. Hitung jumlah tekanan yang terdapat dalam selinder itu jika daya asal merosot sebanyak 10%,. [ 4 marks ] b). i) State two factors that influence the pressure of fluid in a pipe Nyatakan dua faktor yang mempengaruhi tekanan bendalir didalam paip.

[ 2 marks ]

ii) State two media that are used to transfer energy in the hydraulic system. Nyatakan dua medium yang digunakan untuk memindah tenaga dalam sistem hidraulik. [2 marks

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FIGURE 4 4. Figure 4 shows the diagram of a gatepost with the dimensions given. Rajah 4 menunjukkan gambarajah satu tiang pintu pagar dengan ukuran tertentu diberi. The cost rates are as below: •

Cost of reinforced concrete Harga konkrit bertetulang



Cost for digging foundation hole not more than 1.5m depth : RM 70.00/m3 Harga menggali lubang asas tidak melebihi 1.5m dalam :

: RM 850.00/m3 :

a. List out four materials used to construct the gatepost. Senaraikan empat bahan binaan yang digunakan untuk membina tiang pintu pagar itu [4 marks ] b. By using appendix A, calculate the cost estimation to build two concrete gateposts, using bill of quantity method. Dengan menggunakan lampiran A, kira anggaran kos bagi membina dua tiang pintu pagar itu dengan kaedah senarai kuantiti. [16 marks]

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Section C Bahagian C Answer all questions [60 marks] Jawab semua soalan [60 markah]

FIGURE 5 5. Figure 5 shows a block diagram of an incomplete intercom system. Rajah 5 menunjukkan gambarajah bloksistem interkom yang tidak lengkap. a. State two types of intercom. marks ] Nyatakan dua jenis interkom

[2

b. By referring to the amplifier block: Merujuk kepada blok penguat: i) ii)

Explain the function of the block. Terangkan fungsi blok itu. By using appendix B, complete an electronic circuit of the block. Dengan menggunakan lampiran B, lengkapkan litar eletronik pada blok itu [8 marks ]

c. By using appendix B complete the wiring circuit of the intercom block diagram. Dengan menggunakan lampiran B, lengkapkan litar pendawaian bagi gambarajah blok interkom itu. [ 10 marks ]

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FIGURE 6 6

Figure 6 shows a circuit diagram of pneumatic system for a machine. Rajah 6 menunjukkan satu gambarajah litar sistem pneumatik sebuah jentera. a) i) Name the type of component B used in the circuit. Namakan jenis komponen B yang digunakan dalam litar itu. ii) State the function of component A. Nyatakan fungsi komponen A. [ 4 marks ]

b)

By using appendix C. Dengan menggunakan lampiran C. i)

By referring to figure 6, complete the symbol of component A. Merujuk kepada rajah 6, lengkapkan simbol komponen A.

ii)

Modify the circuit by adding a suitable component and complete the connecting line so that, the cylinder can be controlled and the system functions properly. Ubahsuai dengan menambah komponen yang sesuai dan lengkapkan litar skematik itu supaya kelajuan selinder boleh dikawal dan litar berfungsi. [6 marks]

c) Explain the operation of the circuit that has been modified in b). 7 3764/2 SULIT

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3764/2 Terangkan kendalian litar yang telah diubahsuai di b). [10 marks]

FIGURE 7 7. Figure 7 shows a flat slanting toward the lake and it may collapse. Rajah 7 menunjukkan sebuah pangsapuri telah condong kearah tasik dan akan roboh. a. Explain 3 factors that cause the failure of the building from the aspects below: Terangkan 3 faktor yang menyebabkan kegagalan bangunan itu dari aspek-aspek berikut: i) Material Bahan ii) Working process Proses kerja marks ]

[ 18

b. State 2 safety precautions of construction personnel while carrying out concrete work. Nyatakan 2 langkah keselamatan pekerja yang perlu diambil kira semasa melakukan kerja konkrit [ 2 marks ]

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END OF QUESTION PAPER KERTAS SOALAN TAMAT Appendix A Lampiran A

Name ……………………………………………………….. Nama Form …………………………

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Tingkatan

Question no. 4.b)

Dimension form

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3764/2 DIMENSION

DESCRIPTION

1

Volume for pad foundation

1

Volume for gate post

1

Digging the foundation hole with depth not more than 1.5m

Multiplie r column

Dimension column

Multiplying column

Description column

Bill of quantity form No

Detail work

Unit

Quantity

Rate (RM)

Total (RM)

1 2

Construction the gate post

3 OVERALL COST

Appendix B Lampiran B

Name ……………………………………………………….. Nama Form …………………………

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Tingkatan

Question no. 5.b. ii)

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Question no. 5.c.

Appendix C Lampiran C

Name ……………………………………………………….. Nama Form …………………………

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Tingkatan

Question no. 6.b.)

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