This section consists of FOUR (4) structured questions. Answer ALL questions.

Transcription

1 This section consists of FOUR (4) structured questions. Answer ALL questions. ARAHAN: Bahagian ini mengandungi EMPAT (4) soalan berstruktur. Jawab semua soalan. QUESTION 1 SOALAN 1 (a) Diagram 1(a) shows a type of equipment used to reduce size of materials. Rajah 1(a) menunjukan alat yang digunakan untuk mengecilkan saiz bahan. Diagram 1(a) Rajah 1(a) (i) Name the equipment in Diagram 1(a). Namakan peralatan dalam Rajah 1(a). (ii) Describe the working operation of equipment in Diagram 1(a). Huraikan cara operasi alat dalam Rajah 1(a). (iii) Name the equipment that is used to reduce size of materials to powder or dry small particles. Namakan alatan yang digunakan untuk mengecilkan saiz bahan untuk menghasilkan serbuk atau zarah kecil. 2 SULIT

2 (b) Describe the instrument tag given below. Huraikan tag instrument di bawah. (i) (ii) (c) Valve is essential in almost every pipeline. From housing piping to a large scale plant piping, valve is often used. Injap adalah penting dalam hampir kesemua jenis pempaipan. Dari pempaipan di rumah sehingga pempaipan di logi berskala besar injap selalu digunakan. (i) What is valve? Apakah yang dimaksudkan dengan injap? (ii) Name the valve that is usually used for draining purposes. Namakan injap yang selalu digunakan bagi tujuan penyaliran. (iii) Draw the symbol of the valve from your answer in c(ii). Lukiskan simbol bagi injap dari jawapan anda di c(ii). (iv) What is the function of a pressure regulator? Apakah fungsi penyelaras tekanan? [2 mark] 3 SULIT

3 (d) Draw the symbols for the following equipments. Lukiskan simbol bagi alatan dibawah. (i) Atmospheric tank Tangki atmosfera (ii) Screener skriner (iii) Tray dryer Pengering tray (iv) Dessicant Desikan (v) Dual Drive engine Injin dual drive [5 marks] [5 markah] (e) Mixer is used in processing equipment. Pengadun digunakan dalam peralatan pemprosesan. (i) What is the function of a mixer with agitator? Apakah fungsi pengadun dengan pengaduk? (ii) Apart from mixer, name TWO other equipments that is used in processing. Selain daripada pengadun, berikan DUA peralatan lain yang digunakan dalam pemprosesan. 4 SULIT

4 QUESTION 2 SOALAN 2 (a) Give FOUR characteristics of block flow diagram. Berikan EMPAT ciri gambarajah blok. (b) Convert the given situation into a block flow diagram : Tukarkan situasi di bawah kepada gambarajah blok. Crude palm oil was stored in cone bottom bin storage tank for several hours. Steam refining is carried out where steam is introduced in the crude oil in a column tower. Refined crude palm oil the moves to a mixer through the main pipeline for degumming process where acid is introduced. Then separation process will be carried out where the oil will move to distillation tower. Distillation tower contains two sections, the upper most section collects palmitic acid and second column collects stearic acid. Palmitic acid will be stored in close top bulk storage where stearic acid will be placed in a steam tower so that it stays in liquid form. After that both the acid will continues to next process separately. [4 marks] [4 markah] [9 marks] [9 markah] (c) Give FOUR differences between block flow diagram and process flow diagram. Berikan EMPAT perbezaan antara gambarajah blok dengan gambarajah pemprosesan. [8 marks] [8 marks] (d) Define flow diagram. Berikan definisi gambarajah alir. C3 (e) Why do we need a flow diagram? Mengapa kita memerlukan gambarajah alir? 5 SULIT

5 QUESTION 3 SOALAN 3 (a) Construct a Piping Identification System (PIS) for the situation below: In unit 8 of the urea plant, a pipe with diameter 75 mm and material specifications 1P2 was found to bring acid into the next unit. The pipe was equipped with 76 mm heat conservation insulation. The line is located at number 100. Bina sistem pengenalan perpaipan bagi situasi dibawah: Di unit 8 sebuah loji urea, terdapat satu perpaipan dengan diameter 78mm dan spesifikasi1p2 yang mengalirkan asid ke unit seterusnya. Paip dilengkapi dengan penebat setebal 76mm jenis penebatan haba. Saluran berada pada nombor 100. [6 marks] [6 markah] (b) List THREE (3) advantages of an automatic control system. Senaraikan TIGA(3) kelebihan sistem kawalan automatik. [6 marks] [6 markah] Diagram 3(c) / Rajah 3(c) (c) (i) Name type of flow diagram shown in Diagram 3(c) above. Namakan jenis rajah aliran dalam Rajah 3(c) seperti di atas. [1 marks] 6 SULIT

6 (ii) Describe the type of control system and instrumentation used in Diagram 3(c). Jelaskan jenis sistem kawalan dan instrumentasi yang digunakan dalam Rajah 3(c). [7 marks] [7 markah] C3 (d) A furnace is used to heat a process fluid to a desired temperature by manipulating the flow rate of fuel gas via a pneumatically actuated 2 fail closed control valve. The control system uses electrically connected locally mounted transmitter and a locally board mounted indicator to a shared display control Distributed Control System (DCS) indicator controller. Assuming the inlet process fluid into the furnace as a major disturbance to the system measured, sketch a feedforward control loop numbered as 110 to control the unmeasured outlet process fluid temperature. Sebuah relau digunakan untuk memanaskan bendalir proses kepada suhu yang dikehendaki dengan melaraskan kadar alir bahan api gas dengan menggunakan injapkawalan pneumatik gagal tertutup bersaiz 2.Sistem kawalan secara elektrikal menghubungkan transmitter setempat dan penunjuk yang dipasang pada panel paparan setempat ke Sistem Kawalan Teragih (DCS) perkongsian paparan kawalan penunjuk dan pengawal. Dengan menganggap kadar aliran masuk bendalir proses sebagai gangguan utama kepada sistem yang diukur, lakarkan gegelung suap hadapan yang dinomborkan sebagai 110 yang diperlukan untuk mengawal suhu keluaran bendalir proses yang tidak diukur. [5 marks] [5 markah] 7 SULIT

7 QUESTION 4 SOALAN 4 The following questions in based on flow diagram given in Appendix 1. Soalan berikutnya adalah berdasarkan kepada rajah aliran proses dalam Appendix 1. (a) Process flow diagram is an illustration of a plant that is usually used as an observatory work for engineers and technician. There are several types of flow diagram that can be used according to desired functions. Gambarajah proses aliran adalah gambarajah logi yang digunakan oleh jurutera dan juruteknik bagi kerja kerja pemantauan. Terdapat pelbagai jenis gambarajah aliran yang boleh digunakan untuk pelbagai fungsi. (i) State the type of process flow diagram, title and drawing number in Appendix 1. Nyatakan jenis rajah aliran proses, tajuk dan nombor lukisan dalam Appendix 1. (ii) Describe the symbol, operational data and fluid cooled in the equipment EB Jelaskan simbol, data perkakasan dan bendalir yang disejukkan dalam perkakasan EB (iii)describe the abbreviation CWS, CWR dan RVH at the equipment EB Jelaskan maksud singkatan CWS, CWR dan RVH pada perkakasan EB [4 marks] [4 markah] (b) At the equipment EB-0103, Pada perkakasan EB-0103, (i) State the piping code for deisobutamizer to and from EB Nyatakan kod pempaipan untuk deisobutamizer yang masuk dan keluar melalui EB SULIT

8 (ii) State the size of pipe reducer used for EB-0103 and pipe size used for CWS and CWR. Nyatakan saiz paip pengecil yang digunakan untuk EB-0103 dan saiz paip yang digunakan untuk CWS dan CWR. (iii)describe the monitored variable and instrumentation used at CWR pipe. Jelaskan pembolehubah yang dipantau dan alat instrumentasi yang digunakan pada paip CWR. (c) At the equipment EB-0103, explain the instrumentation used to monitor variable for loop Pada perkakasan EB-0103, terangkan instrumentasi yang digunakan untuk memantau pemboleh ubah pada gelung [4 marks] [4 markah] C3 (d) Describe briefly the flow of deisobutamer from 62-D-0103 to 62-D-0201 trough EB-0105 Terangkan dengan ringkas aliran deisobutamer daripada 62-D ke 62-D-0201 melalui EB [5 marks] [5 markah] SOALAN TAMAT 9 SULIT