SULIT JA201: AUTOMOTIVE TECHNOLOGY 2

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1 INSTRUCTION: This section consists of SIX (6) essay questions. Answer FOUR (4) questions only. ARAHAN : Bahagian ini mengandungi ENAM (6) soalan esei. Jawab EMPAT (4) soalan sahaja. QUESTION 1 SOALAN 1 (a) Describe the function of the following carburetor fuel delivery system components: Huraikan fungsi komponen di dalam sistem penghantaran bahan api karburetor berikut: i. Air filter Penapis udara ii. Fuel pump Pam bahan api iii. Fuel tank Tangki bahan api [6 marks] [6 markah] (b) i. Explain the working principle of Air Induction System in Electronic Fuel Injection (EFI). Terangkan prinsip kerja bagi sistem induksi udara di dalam sistem suntikan bahan api elektronik (EFI). [6 marks] [6 markah] 2 SULIT

2 ii. State THREE (3) type of sensors in Electronic Fuel Injection (EFI). Nyatakan TIGA (3) jenis penderia di dalam sistem suntikan bahan api elektronik (EFI). [3 marks] [3 markah] (c) Explain the operation of Inline (PE) Diesel Fuel Injection Pump. Terangkan operasi pam suntikan bahan api diesel sebaris. QUESTION 2 SOALAN 2 (a) DOT 3 and DOT 4 brake fluids are hygroscopic. Explain the term hygroscopic. Cecair brek DOT 3 dan DOT 4 adalah higroskopik. Terangkan maksud higroskopik. [3 marks] [3 markah] (b) List down FOUR (4) characteristics of brake fluid. Senaraikan EMPAT (4) sifat-sifat bendalir brek. [8 marks] [8 markah] (c) Describe TWO (2) functions of handbrake system and list down TWO (2) types of handbrake. Terangkan DUA (2) fungsi sistem brek tangan dan nyatakan DUA (2) jenis sistem brek tangan. 3 SULIT

3 (d) State FIVE (5) differences between disc brake and drum brake system. Nyatakan LIMA (5) perbezaan di antara brek cakera dan brek gelendong. QUESTION 3 SOALAN 3 (a) List down FIVE (5) functions of the steering system. Senaraikan LIMA (5) fungsi sistem stering. [5 marks] [5 markah] C3 (b) With the aid of a diagram, explain the operation of hydraulic power assisted rack and pinion steering system. Dengan bantuan gambarajah, terangkan operasi sistem stering bantuan kuasa hidraulik rak dan pinan. (c) List down FIVE (5) component of electric power steering system (EPS) and state the function for each components. Senaraikan LIMA (5) komponen Stering Kuasa Elektrik dan terangkan fungsi bagi setiap komponen. 4 SULIT

4 QUESTION 4 SOALAN 4 C3 (a) Sketch circuit diagram for vehicle starting system and explain the function for each components. Lakarkan gambarajah litar sistem penghidup kenderaan dan terangkan fungsi setiap komponen. [12 marks] [12 markah] (b) List down THREE (3) types of internal starter motor circuit. Nyatakan TIGA (3) jenis litar dalaman motor penghidup. [6 marks] [6 markah] (c) Explain the operation of the vehicle starter motor. Terangkan operasi motor penghidup kenderaan. [7 marks] [7 markah] QUESTION 5 SOALAN 5 (a) List down FOUR (4) functions of charging system in the vehicle. Senaraikan EMPAT (4) fungsi sistem pengecas dalam kenderaan. 5 SULIT

5 (b) State FOUR (4) possible cause of low charging rate and FOUR (4) possible cause of excessive charging rate in the charging system. Nyatakan EMPAT (4) penyebab berlakunya kadar cas rendah dan EMPAT (4) penyebab berlakunya kadar cas yang berlebihan dalam sistem pengecas. [8 marks] [8 markah] (c) List down THREE (3) types of alternator testing method. Senaraikan TIGA (3) jenis ujian bagi alternator. [3 marks] [3 markah] C3 (d) With the aid of a diagram, explain the operation of charging system. Dengan bantuan gambarajah, terangkan kendalian sistem pengecas. QUESTION 6 SOALAN 6 (a) State TWO (2) functions of clutch system. Nyatakan DUA (2) fungsi sistem cekam 6 SULIT

6 (b) With the aid of a diagram, explain the operation of diaphragm spring clutch when: Dengan bantuan gambarajah, terangkan operasi cekam jenis spring gegendang apabila: i. The clutch engaged. Cekam bersambung. ii. The clutch disengaged. Cekam tidak bersambung. [12 marks] [12 markah] (c) State TWO (2) function of lubricant in the manual transmission system. Nyatakan DUA(2) fungsi minyak pelincir di dalam sistem penghantaran manual. 7 SULIT

7 (d) Refer Figure 1 below, find the gear ratio of the compound gear. Rujuk Rajah 1 dibawah, kira nisbah gear bagi gear gabungan. [5 marks] [5 markah] Main Drive (3 rd ) Gear 2-3 Syncronizer (2 nd ) Gear engaged 2 nd Gear 1 st Gear 1-Rev Syncronizer Reverse Gear Counter Gear Rev. Idler Gear Figure 1 Rajah 1 SOALAN TAMAT 8 SULIT