REG 261 Building Services (Perkhidmatan Bangunan)

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UNIVERSITI SAINS MALAYSIA Second Semester Examination Academic Session 2012/2013 June 2013 REG 261 Building Services (Perkhidmatan Bangunan) Duration: 3 hours (Masa: 3 jam) Please check that this examination paper consists of NINE pages of printed material before you begin the examination. Sila pastikan bahawa kertas peperiksaan ini mengandungi SEMBILAN muka surat yang tercetak sebelum anda memulakan peperiksaan ini. Students are allowed to answer all questions in English OR in Bahasa Malaysia. Pelajar dibenarkan menjawab semua soalan dalam Bahasa Inggeris ATAU Bahasa Malaysia. Answer FIVE questions only. Jawab LIMA soalan sahaja. In the event of any discrepancies, the English version shall be used. [Sekiranya terdapat sebarang percanggahan pada soalan peperiksaan, versi Bahasa Inggeris hendaklah diguna pakai]. 2/-

[REG 261] - 2-1. (a) Building is not just a shelter to the occupants but also be an environment where people can live, work and achieve what they desire. In your own words, discuss FOUR (4) important characteristics of optimal building services system to be provided that may enhance the internal atmosphere and quality of a building holistically. Sesuatu bangunan tidak hanya berperanan sebagai tempat perlindungan kepada para penghuninya tetapi pada masa yang sama menyediakan persekitaran di mana mereka boleh hidup, melaksanakan kerja dan mencapai apa yang mereka inginkan. Dengan menggunakan penerangan sendiri, jelaskan EMPAT (4) ciri-ciri penting sistem perkhidmatan bangunan optimum yang perlu disediakan yang berkemampuan untuk meningkatkan persekitaran dalaman dan kualiti sesuatu bangunan secara keseluruhan. (8 marks/markah) Card reader generally been used in physical security system to allow an access through the access control points, typically a locked door. Discuss FOUR (4) types of card reader and their advantages and disadvantages. Pembaca kad pada umumnya digunakan dalam sistem keselamatan fizikal untuk membolehkan akses melalui titik kawalan akses pada kebiasaannya pintu yang berkunci. Bincangkan EMPAT (4) jenis pembaca kad beserta dengan kelebihan dan kekurangan setiap daripadanya. (8 marks/markah) Total luminous outputs of 2 fluorescent lamps are 4868ml. The wattage for each lamp is 38W. Calculate the efficiency of each fluorescent lamp? Jumlah output luminen untuk 2 lampu fluorescent adalah 4868ml. Jumlah watt bagi setiap lampu ialah 38W. Kira kecekapan setiap lampu fluorescent tersebut. (4 marks/markah)...3/-

[REG 261] - 3-2. (a) Fire prevention and control system is the practice of mitigating the unwanted effects of fires. Explain in detail FOUR (4) active fire prevention systems and give examples for each category. Sistem pencegahan dan pengawalan kebakaran adalah praktis untuk mengurangkan kesan-kesan kebakaran yang tidak diingini. Huraikan dengan terperinci EMPAT (4) sistem pencegahan kebakaran aktif dan berikan contoh untuk setiap kategori. (8 marks/markah) The objectives of automatic fire detectors are to indicate the location of outbreak of fire, to operate the alarm bells and to communicate with the local authority system. Discuss FOUR (4) types of operating characteristics of automatic fire detectors with the aid of sketches? Tujuan pengesan kebakaran automatik adalah untuk mengesan lokasi permulaan kebakaran, mengendalikan loceng penggera dan berinteraksi dengan sistem pihak berkuasa tempatan. Huraikan EMPAT (4) jenis ciri operasi pengesan kebakaran automatik dengan bantuan lakaran. (8 marks/markah) Calculate the fire vent area (in percentage %) for a single storey house which has a floor area of 5950 m 2 ; fire hazard perimeter of 495 meter; floor to centre line of vent height of 4.2 meter and vent factor of 0.59. Kira luas lubang angin untuk kebakaran (dalam peratus; %) untuk sebuah rumah satu tingkat yang mempunyai luas lantai 5950 m 2 ; perimeter risiko kebakaran 495 meter; ketinggian sebanyak 4.2 meter dari lantai ke garis tengah lubang angin dan faktor lubang angin sebanyak 0.59. (4 marks/markah)...4/-

- 4 - [REG 261] 3. (a) Solar energy is one of the sources of renewable energy. Define renewable energy and state FOUR (4) advantages of solar energy. Tenaga solar merupakan satu daripada sumber tenaga diperbaharui. Berikan definisi tenaga diperbaharui dan nyatakan EMPAT (4) kelebihan tenaga solar. (5 marks/markah) Based on the International Standard IEC 60364, there are THREE (3) main commonly used earthing arrangements found in domestic electrical installation. State the meaning of each designated letter used and with the aid of sketches, explain those earthing arrangements. Berdasarkan standard antarabangsa IEC 60364, terdapat TIGA (3) aturan pembumian utama yang biasa digunakan dalam pemasangan elektrikal domestik. Nyatakan maksud setiap huruf yang digunakan dan dengan bantuan lakaran, terangkan aturan-aturan pembumian tersebut. (15 marks/markah) 4. (a) State FIVE (5) purposes of mechanical ventilation in building. Nyatakan LIMA (5) tujuan pengudaraan mekanikal di dalam bangunan. (5 marks/markah) Explain THREE (3) of the air-conditioning system design and selection criteria that always been considered by users. Terangkan TIGA (3) daripada kriteria rekabentuk dan pemilihan sistem pendingin hawa yang selalu diberi pertimbangan oleh pengguna. (6 marks/markah)...5/-

- 5 - [REG 261] An air-conditioning system ductwork (Figure 1) contains air at 21 o Cdb and 15 o Cwb, mixing with fresh air 36 o Cdb and 25 o Cwb before processing in an air-handling unit. If the ratio of mixed air (return air:fresh air) is 3:1, plot the conditions of mixed air on the psychrometric chart (Appendix 1). (i) (ii) (iii) wb and db temperature Relative humidity (RH) Moisture content Satu saluran udara sistem penyamanan udara (Gambarajah 1) mengandungi udara balik pada keadaan 21 o Cbk dan 15 o Cbb yang kemudiannya bercampur dengan udara segar pada keadaan 36 o Cbk dan 25 o Cbb sebelum diproses di dalam unit pengelolaan udara. Jika nisbah campuran udara balik kepada udara segar ialah 3:1, plotkan keadaan berikut pada carta psychrometric (Lampiran 1) bagi udara campuran yang dihasilkan. (i) (ii) (iii) Suhu wb dan db Kelembapan relatif (RH) Kandungan lembapan Figure/Gambarajah 1 : Air-conditioning system ductwork / saluran udara sistem penyamanan udara (9 marks/ markah)...6/-

- 6 - [REG 261] 5. (a) What are the factors to be considered when designing a lift system? Apakah faktor-faktor yang perlu dipertimbangkan dalam merekabentuk sistem lif? (6 marks/markah) An office building of 12 floors above the main terminal is to be built, each floor of 1200 sqm of net space. The inter-floor distance is 3.5m. The required up peak interval is 30s (i.e. satisfactory grade) Estimation of population: assume 12sqm per person per floor. Assume 12.5% population peak arrival rate. Assumed lift rated speed = 1.5m/s Sebuah pejabat 12 belas tingkat diatas terminal utama akan dibina dengan setiap tingkat berukuran 1200 mps ruang guna. Jarak antara lantai ialah 3.5m. Sela puncak yang diperlukan ialah 30s (i.e. gred kepuasan). Anggaran populasi : andaikan 12mps setiap orang setiap tingkat. Andaikan 12.5% populasi kadar ketibaan masa puncak. Andaikan kelajuan lif = 1.5m/s Given that / Diberi : ts=7.7s (from code/dari kod) tp=1.2s (assumed/andaian) H=9.5, S=6.7 (from code/dari kod) Determine the following information: Tentukan maklumat-maklumat berikut: i) Persons per floor Bilangan orang setiap tingkat ii) iii) iv) Number of persons per arrival Bilangan orang bagi setiap ketibaan Number of lift trips per 5 minutes Jumlah perjalanan lif setiap 5 minit Car size required (person car) Saiz lif yang diperlukan (bilangan orang) v) Total travel distance per lift Jumlah jarak perjalanan setiap lif vi) Transit time between 2 floors Masa transit antara 2 tingkat...7/-

- 7 - [REG 261] vii) viii) ix) RTT (Round Trip Time) MPP (Masa perjalanan pergi-balik) Number of car required Jumlah lif diperlukan Handling Capacity (persons per 5 mins) Kapasiti tanggungan (orang setiap 5 minit) x) What is the difference between quantity of service and quality of service? Apakah perbezaan di antara kuantiti dan kualiti perkhidmatan? (14 marks/markah) 6. You have been assigned to plan the sanitary facility of a luxury 10 storey apartment. Every unit has three toilets. Every floor has 2 units. You can propose ONE (1) of the following systems: (a) Dual Pipe System One Pipe System One Stack System With the aid of sketches, describe the main characteristics of your proposed sanitary system. Elaborate also on the differences and advantages / disadvantages of your proposed system in comparison to the other systems. Assume the quantity and types of sanitary appliances for each unit. Anda ditugaskan untuk merancang sistem sanitari satu bangunan pangsapuri mewah 10 tingkat. Setiap unit mempunyai tiga bilik air. Di setiap tingkat terdapat 2 unit. Anda boleh mencadangkan SATU (1) daripada sistem berikut:- (a) Sistem Dua Paip Sistem Satu Paip Sistem Satu Stak (Setindan) Dengan bantuan lakaran, huraikan ciri-ciri utama cadangan sistem sanitari anda. Bincangkan juga perbezaan serta kelebihan dan kekurangan sistem cadangan anda berbanding sistem yang lain. Andaikan bilangan dan jenis peralatan sanitari bagi setiap unit. (20 marks/markah)...8/-

[REG 261] - 8-7. You have been assigned to plan the toilet facility of a water theme park. With the aid of sketches, describe the main characteristics that a good designed toilet should have taking into consideration the following factors; layout, lighting, construction material, sanitary appliances (wash basin, water closet and urinal), ventilation, basic amenities and the needs of the handicapped. Anda ditugaskan untuk merancang kemudahan tandas sebuah tandas di taman tema air. Dengan bantuan lakaran, huraikan ciri-ciri utama yang perlu ada bagi satu tandas yang direkabentuk dengan baik dengan mengambil kira faktor berikut; tatatur, pencahayaan, bahan binaan, peralatan sanitari (besin basuh tangan, mangkuk tandas dan urinal), pengudaraan, kemudahan asas dan keperluan warga handicap. (20 marks/markah)...9/-

[REG 261] - 9 - APPENDIX/LAMPIRAN 1 : Psychrometric Chart / Carta Psikrometrik (To submit together with answer script / Sertakan dengan kertas jawapan) -ooo0ooo-