GP315: PLANT UTILITY. State function of a compressed air system. Nyatakan fungsi sistem udara termampat. [2 marks] [2 markah]

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1 STRUCTURED (100 marks) STRUKTUR (100 markah) INSTRUCTION: This section consists of SIX (6) structured questions. Answer FOUR (4) questions only. ARAHAN: Bahagian ini mengandungi ENAM (6) soalan struktur. Jawab EMPAT (4) soalan sahaja. QUESTION 1 SOALAN 1 State function of a compressed air system. Nyatakan fungsi sistem udara termampat. List THREE (3) subsystems in a compressed air system. Senaraikan TIGA (3) sistem sampingan dalam sistem udara termampat 2 SULIT

2 (c) Define each types of compressed air below. Takrifkan setiap jenis udara termampat berikut. i) Plant Air Udara loji ii) Instrument Air Udara Peralatan iii) Process Air Udara Proses iv) Breathing Air Udara Pernafasan Explain briefly THREE (3) types of distribution system in a compressed air system. Jelaskan TIGA (3) jenis sistem pengedaran di dalam sistem udara termampat. [6 marks] [6 markah] CLO 2 (e) (i) Draw the process flow diagram of a compressed air plant. Lukis gambarajah aliran proses bagi loji udara termampat 3 SULIT

3 (ii) Explain briefly the process flow in a compressed air plant. Jelaskan aliran proses pada loji udara termampat. QUESTION 2 SOALAN 2 State THREE (3) characteristics of Nitrogen gas. Nyatakan TIGA (3) ciri-ciri gas nitrogen. Define the application of nitrogen listed below. Takrifkan aplikasi nitrogen berikut i) Blanketing Blanketing ii) Purging Purging iii) Carrier Carrier (c) Nitrogen gas, in term of its characteristics, is suitable to fill the tyres of vehicles. Justify this statement. Gas nitrogen mempunyai ciri ciri yang sesuai digunakan untuk mengisi tayar kenderaan. Buktikan kenyataan ini 4 SULIT

4 CLO3 List THREE (3) types of nitrogen production methods in industry. Senaraikan TIGA (3) jenis cara penghasilan nitrogen dalam industri. [6 marks] [6 markah] CLO2 (e) (i) Draw a process flow diagram for the process which produces the highest purity of nitrogen. Lakarkan gambarajah aliran proses untuk proses yang menghasilkan ketulenan nitrogen yang paling tinggi (ii) Discuss briefly the process flow in (e)(i). Bincangkan aliran proses bagi proses di (e)(i). QUESTION 3 SOALAN 3 Define the Blowdown system. Takrifkan sistem Blowdown. Describe the function of Flare Gas Stack. Jelaskan mengenai fungsi Flare Gas Stack. (c) List THREE (3) types of flare systems in a gas processing plant and state the differences between them. 5 SULIT

5 Senaraikan TIGA (3) jenis sistem flare dalam loji pemprosesan gas dan nyatakan perbezaan antara sistem tersebut. [6 marks] [6 markah] Which industries usually use flare and blowdown system? Explain the importance of flare and blowdown system in these indusries. Nyatakan industri yang menggunakan sistem flare dan blowdown. Jelaskan kepentingan sistem flare dan blowdown dalam industri tersebut. (e) State the function of every component below. Nyatakan fungsi setiap komponen di bawah i) KO Drum KO Drum ii) Flare Air Blower Flare Air Blower iii) Flare Protection Air Blower Flare Protection Air Blower iv) Burnpit Burnpit 6 SULIT

6 v) Flare Header Flare Header QUESTION 4 SOALAN 4 Define terminal operation. Takrifkan operasi terminal. List all units involved in terminal operation. Senaraikan semua unit yang terlibat di dalam operasi terminal. [4 marks] [4 markah] (c) Identify the full name of each Plastic Identification Code below. Kenal pasti nama penuh bagi setiap Kod Pengenalan Plastik berikut [6 marks] [6 markah] State the full name of each acronym of Plastic Identification Code below. Nyatakan nama penuh bagi setiap akronim Kod Pengenalan Plastik berikut i) HDPE HDPE ii) PVC PVC 7 SULIT

7 CLO 2 (e) iii) BTX BTX Sketch each type of storage tanks below and state the function for every storage tank. Lakarkan setiap jenis tangki penyimpanan di bawah dan fungsi bagi setiap tangki simpanan tersebut. CLO 2 CLO 2 i) Cone roof Bumbung Kon ii) Floating type roof Bumbung Terapung iii) Spherical tank Tangki Sfera QUESTION 5 SOALAN 5 Name TWO (2) types of intake used in raw water treatment plant. Namakan DUA (2) jenis masukan yang digunakan di loji rawatan air mentah. Sedimentation tank is one of the components in a raw water treatment plant. Explain the function of the sedimentation tank. 8 SULIT

8 Tangki mendapan adalah salah satu komponen dalam loji rawatan air mentah. Jelaskan fungsi tangki mendapan. (c) Explain clearly the process of demineralization to produce boiler feed water. Jelaskan dengan terperinci proses dimineralisasi untuk menghasilkan air masukan dandang. [8 marks] [8 markah] (e) Explain the difference between Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD). Jelaskan perbezaan antara Chemical Oxygen Demand (COD) dan Biological Oxygen Demand (BOD). [4 marks] [4 markah] C.O.D (mg/l) Chemical Oxygen Demand B.O.D (mg/l) Biochemical Oxygen Demand ph Value D.O (mg/l) Dissolved Oxygen Figure 1 Rajah 1 9 SULIT

9 Figure 1 shows some of the parameters that need to be monitored in wastewater treatment plant in order to make sure that they are in the permitted range before discharging the effluent. For each parameter, explain the effect to the water if the range exceeds the permitted level. Rajah 1 menunjukkan parameter yang perlu diawasi di loji rawatan air buangan bagi memastikan ianya pada tahap yang dibenarkan sebelum di buang. Bagi setiap parameter, terangkan kesan kepada air jika parameter tersebut melebihi had yang dibenarkan. [8 marks] [8 markah] QUESTION 6 SOALAN 6 Explain briefly the process of Cooling Pond System. Jelaskan proses Sistem Kolam Penyejukan. Fill is one of the most important parts in cooling tower. State the function of fill in cooling tower. Fill adalah salah satu bahagian yang paling penting pada menara penyejuk. Nyatakan fungsi fill pada menara penyejuk. CLO 2 (c) (i) Draw the process flow diagram of natural draft cooling tower. Lakarkan gambarajah aliran proses bagi menara penyejuk natural draft. [4 marks] [4 markah] (ii) Explain briefly the process flow of a natural draft cooling tower. Jelaskan dengan terperinci aliran proses menara penyejuk natural draft 10 SULIT

10 State THREE (3) differences between fire tube boiler and water tube boiler. Nyatakan TIGA (3) perbezaan antara dandang tiub api dan dandang tiub air. (e) There are FOUR (4) types of problems that usually occur in a boiler. List and explain clearly each of the problem. Terdapat EMPAT (4) jenis masalah yang kerap terjadi pada dandang. Senaraikan dan jelaskan setiap masalah tersebut. [8 marks] [8 markah] SOALAN TAMAT 11 SULIT