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Q1— Section header —
1.1Various options are given as possible answers to the following questions. Choose the answer and write only the le tter (A D\ next to the question number (1.1.1
1.1.10\in the ANSWER BOOK.
1.1.1Instrument used to measure crankshaft end float
1.1.2hich component opens and closes the inlet port n a four stroke engine?
1.1.3The main constituent in clutch plate manufacturing: Fi bre
1.1.4Wankel Otto diesel petrol
1.1.5il pum with the most pulsation:
1.1.6Which oil additive reduces sludge formation in the crankcase? Corrosion inhibitors Oxidation inhibitors Detergent or dispersant Foaming inhibitors
1.1.7The lu bricant system most commonly used in small engines
1.1.8The component in a ooling system that controls engine temperature
1.1Engine layout in F1 rac ing cars: Front
1.1.10The wheel rim design exclusively used for passenger cars and light commercia l vehicles:
1.2Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'True' or 'False' next to the ques tion number (1.2.1
1.2.10\the ANSWER BOOK.
1.2.1Unsafe acts and conditions cause accidents.
1.2.2It is acceptable to work underneath a car without axle stands if you are in a hurry.
1.2.3A pin punch is used to make a guide hole for d rilling holes.
1.2.4A reamer is a cutting tool used to accurately size drilled holes.
1.2.5A gudgeon pin holds the piston and connecting rod together.
1.2.6Hydraulic cam followers allow the valve train to run at 0 mm valve clearance.
1.2.7A micrometer is used to measure external and internal diameters. 11040651 Copyright reserved Please turn over
1.2.8Because the two stroke engine delivers power on every downward stroke, it is more powerful and efficient than the four stroke engine.
1.2.9Oil diluti on occurs when the sump is over filled with oil.
1.2.1020
Q2— Section header —
2.1Draw a neat labelled sketch of a vernier calliper . Include at least FIVE labels. (5 + 5
2.2Name the FIVE categories of safety signs. (5\ [15]15
Q3— Section header —
3.1List the 10 main components th at make up a conventional short block sub assembly.
3.2Name the material that pistons are made of and explain why this material is preferred. (1 + 2\ (3\
3.3Name THREE camshaft drive systems used on engines. (3\
3.4Give THREE advantages of belt drive systems. (3\
3.5Which conventional cam drive system directly drive the camshaft in the opposite direction of cran
Q4— Section header —
4.1Explain how radiator shutters control engine temperature. (7\
4.2Give THREE advantages of an air cooled system over a water cooled system. (3\
4.3How are the cylinders in air cooled engine s adapted to improve heat dissipation? (2\
4.4What is the boiling point of pure water at sea level? (1\
4.5Give TWO methods to in crease the boiling point of engine coolant. (2\ [15] 1104065115
Q5— Section header —
5.1Explai n the process of testing engine oil pressure. (5\
5.2Give FIVE reasons why the oil light will flicker when the engine is at idle. (5\
5.3Make a neat , labelled sketch of a plunger type oil pressure control valve. (5\ [15]15
Q6— Section header —
6.1What advice will you give to a customer if the tyres of his/her car are wearing on the outer edges? (1\
6.2Name THREE constituents used in tyre production. (3\
6.3Give FOUR advantages of tubeless tyres. (4\
6.4Give THREE reasons why a battery may be flat in the morning. (3\
6.5Which TWO types of springs are used in pressure plate assemblies? (2\
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