SULIT DJA2013: AUTOMOTIVE TECHNOLOGY 1

Transkripsi

1 INSTRUCTION: 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) Define displacement volume and compression ratio of an engine. Takrifkan isipadu anjakan dan nisbah mampatan dalam sesebuah enjin. (b) Identify SIX (6) classification of an engine based on its design features. Kenal pasti ENAM (6) pengkelasan enjin merujuk kepada ciri-ciri rekabentuknya. [6 marks] [6 markah] (c) List the functions of an engine s cooling system. Senaraikan fungsi sistem penyejukkan enjin. CLO2 C3 (d) i. Draw an engine s splash type lubrication system i. Lukiskan sistem pelinciran enjin jenis simbah ii. Explain how does the splash lubrication system works. ii. Terangkan cara kerja sistem pelinciran jenis simbah. 2 SULIT

2 C3 (e) List the differences between the ignition system used for the spark ignition (SI) engine and compression ignition (CI) engine. Senaraikan perbezaan sistem penyalaan yang digunakan oleh enjin pembakaran cucuhan dan enjin pembakaran mampatan. QUESTION 2 SOALAN 2 (a) List THREE (3) components of a manual linkage/parallelogram type of steering system. Senaraikan TIGA (3) nama-nama komponen bagi sistem stering manual jenis perangkai. C5 (b) Predict the consequences if power steering fluid in the Hydraulic Power Steering system is insufficient. Ramalkan apa yang akan berlaku jika bendalir stering kuasa berkurangan di dalam sistem Stereng Kuasa Hidraulik. (c) i. Identify FIVE (5) components of Electric Power Steering System (EPS). i. Kenal pasti LIMA (5) komponen stering kuasa Elektrik. ii. Explain briefly the function of Electric Power Steering System (EPS) components. ii. Terangkan secara ringkas fungsi bagi setiap komponen Stering Kuasa Elektrik. 3 SULIT

3 CLO2 (d) i. Draw and label the construction of Mc Pherson Strut type front suspension system. i. Lukis dan labelkan binaan bagi sistem gantungan hadapan jenis Topang Mc Pherson. ii. Explain the operation of the Mc Pherson Strut system. ii. Terangkan kendalian bagi sistem Topang Mc Pherson. QUESTION 3 SOALAN 3 (a) Identify FOUR (4) causes in the manual transmission gearbox that produce excessive sound during operation. Kenalpasti EMPAT (4) penyebab kotak gear transmisi manual mengeluarkan bunyi bising berlebihan semasa beroperasi. [8 marks] [8 markah] (b) i. List FIVE (5) components of a synchronizer unit. i. Senaraikan LIMA (5) komponen unit penyegerak. ii. Explain THREE (3) functions of synchronizer unit. ii. Terangkan TIGA (3) fungsi unit penyegerak. 4 SULIT

4 (c) There are two methods used to move the release fork in the clutch system, either through a hydraulic or cable mechanism. Explain the advantages of a clutch system that uses hydraulics mechanism. Di dalam sistem cekam terdapat dua kaedah untuk menggerakkan tuil pelepas iaitu mekanisma hidraulik atau kabel. Terangkan kelebihan sistem cekam yang menggunakan mekanisma hidraulik. C5 (d) The floods that hit the country recently resulted in heavy damage to property including vehicle systems. Discuss the effects of damage to the clutch system and the manual gear box of car that submerged in the flood. Bencana banjir yang melanda negara baru-baru ini mengakibatkan banyak kerosakan harta benda termasuk sistem kenderaan. Bincangkan kesan kerosakan pada sistem cekam dan kotak gear yang tenggelam dalam banjir. 5 SULIT

5 QUESTION 4 SOALAN 4 (a) Based on figure 1 below, identify and explain the meaning of coding i,ii,iii & iv labelled at the tyre sidewall. Berdasarkan Rajah 1 dibawah, kenalpasti dan terangkan maksud kod berlabel i,ii,iii & iv pada dinding tayar tersebut. [8 marks] [8 markah] ii iii i iv CLO2 C3 Figure 1 Rajah 1 (b) i. Sketch relevant diagram that shows the differences of the positive camber and negative camber on car tyres. i. Lakarkan gambarajah yang sesuai bagi menunjukkan perbezaan diantara kamber positif dan kamber negatif pada tayar kereta. ii. Identify the effect of the positive and negative camber. ii. Kenal pasti kesan-kesan akibat 'kamber positif dan 'kamber negatif pada tayar kereta. 6 SULIT

6 (c) A motorist was driving a car at a speed of 60 km /h. Suddenly, he pressed the brake pedal because there were obstacles on the road. Unfortunately he failed to slow the car due to the problem with the brake system Based on the above situation, identify FIVE (5) possible causes that might exist in the car brake system. Seorang pemandu sedang memandu kereta pada kelajuan 60 km/j. Tiba-tiba, beliau menekan pedal brek kerana terdapat halangan di atas jalan. Malangnya beliau gagal memperlahankan kereta tersebut disebabkan masalah pada sistem brek Berdasarkan situasi di atas, kenal pasti LIMA (5) penyebab masalah yang berlaku pada sistem brek kereta tersebut. C5 (d) Based on the situation in Question 4 (c), suggest FOUR (4) steps to improve the efficiency of the car braking system. Berdasarkan situasi dalam Soalan 4 (c), cadangkan EMPAT [4] langkah untuk meningkatkan kecekapan sistem brek kereta tersebut. END OF QUESTIONS SOALAN TAMAT 7 SULIT